ML17310A393
| ML17310A393 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 10/27/2017 |
| From: | NextEra Energy Seabrook |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17310A361 | List:
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| References | |
| SBK-L-17157 | |
| Download: ML17310A393 (145) | |
Text
SEABROOK UPDATED FSAR APPENDIX 2C GEOLOGIC INVESTIGATIONS OF THE SCOTLAND ROAD FAULT (CLINTON - NEWBURY FAULT), NEWBURY, MASSACHUSETTS, AND PORTSMOUTH FAULT INVESTIGATIONS The information contained in this appendix was not revised, but has been extracted from the original FSAR and is provided for historical information.
SCOTLAND ROAD FAULT INVESTIGATIONS CONTENTS I.
LOCATION OF FAULT INVESTIGATIONS II.
INVESTIGATION PROCEDURES A.
Preliminary - General Area B.
Final - Property of Marion H. Marshall Estate III. TECHNICAL INVESTIGATIONS A.
Seismic REfraction Survey B.
Borings Investigations 1.
Soils 2.
Bedrock C. Trenching Investigations 1.
Trench 1 2.
Trench 2 3.
Trench 3 4.
Trench 4 D. Age of Pleistocene Deposits E.
Petrographic Examinations F.
Radiometric Age Dating IV. CONCLUSIONS References
Figure 1 Figure 2 Plate 1 Plate 2 Plate 3 Plate 4 Location Map - Regional Fault Investigations Location Map - Scotland Road Fault Investigations Site Plan - Sub-Surface Investigation Geologic Map - Scotland Road Fault Geologic Profile - Scotland Road Fault Surficial Deposits and Trenches Seismic Refraction Survey Geologic and Soils Logs Petrologic Examinations Radiometric Age Determinations
PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE SEABROOK STATION SCOTLAND ROAD FAULT INVESTIGATIONS Investigations have been conducted over a portion of the Scotland Road fault in Newbury, Massachusetts, to determine the presence, lo-cation, orientation and physical characteristics of the fault, and to examine the nature and structure of the unconsolidated Pleistocene deposits which overlie the fault trace. The investigations have indicated that the fault structure is of Permian age, and that Pleistocene deposits overlying the fault zone show no evidence of movement on the fault subsequent to their deposition.
I. LOCATION OF FAULT INVESTIGATIONS The Scotland Road fault was inferred by A. F. Shride of the U. S Geological Survey (Shride; 1971) to trend easterly through the towns of West Newbury, Newbury and Newburyport, Massachusetts, about 7 miles to the south of the proposed Seabrook Station (see Figure 1). Shride has Interpreted the Scotland Road fault to represent the eastern portion of the Clinton-Newbury fault, which is inferred to trend northeasterly for about 60 miles from the area of Worcester, Massachusetts, to project offshore at Plum Island, Newbury.
2 Detailed investigations to locate and examine the fault and its over-lying Pleistocene deposits have been carried out just to the north of Scotland Road near the north corner of Newbury, Massachusetts, in an open field owned by the Marion H. Marshall Estate (see Figure 2). In this area, the fault forms the boundary between Newburyport granodiorite of presumed Devonian age on the north, and an unnamed complex of diorite and schist of unknown geologic age on the south. Diabase dikes of prob-able Triassic age intrude both the Newburyport and the unnamed diorite/
schist on both sides of the fault.
II. INVESTIGATION PROCEDURES A. Preliminary - General Area As preliminary investigation of the Scotland Road fault zone, J. R. Rand walked portions of the fault trace, and inquired of A. F. Shride by telephone as to his studies of the fault zone in the area. R. J. Holt of Weston Geophysical Research, Inc., and J. R. Rand together viewed the inferred trace of the fault zone between Plum Island and Groveland, Massachusetts, by helicopter flying at various altitudes. Diorite ridges aligned parallel to, and about 1000 feet to the south of the trace of the Scotland Road fault in West Newbury are readily seen from the air, but no anomalous physiographic features were noted along the trace of the fault Itself. Backhoe trenching investigations over the inferred trace of the fault were attempted on the farm of Miss Alice Elwell, adjacent to Holman Lane,
West Newbury. This exploration, ultimately involving a 232-foot trench excavation in boulder till, sand-cobble till and clay till, was terminated because these glacial materials did not appear suitable for demonstrating the presence or absence of tectonic fault deformation.
B. Final - Property of Marion H. Marshall Estate As geographic control for all investigations at the final study area on property owned by the Marion H. Marshall Estate in Newbury, a stadia survey of the area and a base map showing all pertinent features were provided by McKenna Associates, Engineers, Portsmouth, New Hampshire (see Plate 1). Technical investigations in the study area have included a seismic refraction survey; the excavation of four backhoe trenches; and the drilling of nine core borings. Laboratory investigations conducted on drill core samples from the study area have included petrographic examina-tions and radiometric age dating.
III. TECHNICAL INVESTIGATIONS A. Seismic Refraction Survey A seismic refraction survey was conducted across the study area during the period November 5-19, 1973, by Weston Geophysical Engineers, Inc.,
Weston, Massachusetts, to determine thicknesses of unconsolidated overburden and weathered rock materials, as well as velocities of the various geologic materials in the study area. Technical details of this survey are presented In a report by Weston Geophysical Engineers, Inc., attached herewith.
4 This seismic survey report concludes:
"The bedrock surface, as interpreted from seismic data, does not have any sharp breaks indicating faulting. The seismic velocities of the bedrock do not change sufficiently along the 1000-foot line of investiga-tion to indicate the presence of any significant bedrock anomaly. The fault zone does not exhibit significant velocity differences from adjacent bedrock."
B. Borings Investigations During the period December 4, 1973, to February 13, 1974, nine borings were put down along the centerline of the seismic refraction survey (Seismic Line "A") to locate, define and sample the Scotland Road fault zone (see Plates 2 and 3). These borings, designated SRF-1 through SRF-9, were drilled by American Drilling and Boring Co., Inc., East Providence, Rhode Island, under the supervision of Geotechnical Engineers, Inc., Winchester, Massachusetts. Geotechnical Engineers' personnel logged the unconsolidated soils materials in these borings, and J. R. Rand logged the bedrock cores. Detailed logs of these borings are attached herewith.
- 1. Soils The unconsolidated soils materials encountered in 7 of the study area borings include a blanket of silty clay ranging to 40 feet in thickness,
overlying sandy deposits of varying grain sizes which range to 55 feet in thickness. Locally, a basal section of boulders of a few feet in thickness underlies the sand deposits immediately upon the bedrock sur-face. Soils materials were not sampled in the two angle borings, SRF-5 and SRF-7.
Plates 3 and 4 describe J. R. Rand's interpretation of the strati-graphy of the soils materials along the line of borings. The geologic interpretation is that of a blanket of glacial-marine clay of late Pleistocene age overlying glacial outwash and marine sands, all underlain by a smooth bedrock surface on which were deposited discontinuous thin sheets of glacial till or ground moraine. The sands in borings SRF-1 and SRF-4, on the southeastern end of the line of borings, are largely yellow-brown, medium-to coarse-grained, and resemble glacial outwash. The sands In SRF-6, SRF-9, SRF-2, SRF-8 and SRF-3 are commonly finer-grained and gray in color, and contain occasional thin interbeds of gray clay.
These sands underlying the northern part of the line of borings are in-terpreted as having been derived from erosion of the outwash, with rede-position in the near-shore marine environment prior to, but historically essentially contemporaneously with deposition of the marine clays. The boundary between the two types of sandy deposits is in the area of SRF-6, where the elevation of the top of the sandy material is low, and the over-lying clay blanket is thick.
6
- 2. Bedrock The bedrock in the study area has been defined by outcrops of Newburyport granodiorite at the north end of Seismic Line "S", and by the nine borings which extend intermittently from the outcrop area on the north to Scotland Road on the south. The Newburyport outcrops at the north end of the line consist of massive, mottled pink and green, medium-grained granodiorite which exhibits saussurite alteration of feld-spars and chloritization of biotite. The rock does not show evidence of shearing on the outcrop surfaces.
Proceeding southeasterly along the line of borings, the bedrock is seen in cores from SRF-5, SRF-7 and SRF-3 to become progressively more altered chemically and more deformed mechanically, becoming light tannish-green in color, and medium-fine grained and foliated in texture and fabric.
With continued distance to the southeast, the bedrock in the hangingwall of the fault is seen in SRF-7, -8, -2, -9 and -6 to be an intensely de-formed, light yellow-green welded breccia or cataclastic rock. All of the rock in the fault zone is compact and well consolidated, and no zones of clay gouge or other unconsolidated crushed or sheared materials were encountered in borings in the study area.
Borings SRF-7, SRF-8 and SRF-9 all progressed through the intensely deformed portion of the Scotland Road fault zone into unaltered, dark gray diorite and schist of the unnamed complex which lies to the south of the fault.
7 In each of these borings, a thin (1" to 2"), tan aphanitic rock layer was cored about 5 feet stratigraphically above the horizon where altera-tion and cataclastic deformation ceased, and this thin marker has been termed "mylonite" on Plates 3 and 4. Borings SRF-4 and SRF-2 drilled only unaltered bedrock of the diorite/schist complex.
Core in borings SRF-2, -3, -7, -8 and -9 was taken with an orienting barrel. Orientation measurements made by Geotechnical Engineers consistently show schistosity or foliation fabric of cores of the fault zone in these borings to dip in the range 35 0 to 60 0 toward the north or N10 °W.
On Plate 2, the subcrop of the footwall of the fault is interpreted to strike N80°E and to dip to the north at an average of about 44 °. The trace of the footwall lies within only about 150 feet of the location inferred by A. F. Shride from his regional mapping studies. The true thickness of the rock section subject to mechanical deformation in the fault zone ap-proaches 300 feet, indicating that the Scotland Road fault is a regional tectonic feature of major geologic significance.
C. Trenching Investigations At various times during the period November 20, 1973, to March 4, 1974, four backhoe trenches were excavated in the study area to expose and examine the glacial-marine clay which overlies the Scotland Road fault zone (see Plate 2). In all trenches, the organic topsoil zone was about 6 inches to 8 inches thick overlying weathered clay, and was continuous and lay parallel with the nearly planar surface of the study area field.
8 1.
Trench 1 Trench 1, near the north edge of the fault zone, was excavated on November 20, 1973, in massive olive-gray clay to a depth of about 12 feet at the north end of the trench, and was carried for about 150 feet toward the southeast with a depth of 4 feet to 5 feet. A 2-inch to 3-inch layer of fine laminated silty sand occurred in the clay at a depth of 3 feet to 3i feet below ground surface, sloping gradually to the south. This laminated sand-silt layer was continuous and not disrupted in the southern 100 feet of the trench. At the northern end of the trench, the sand-silt layer merged upward into the weathered portion of the soil zone and became unidentifiable.
2.
Trench 2 Trench 2, to the south of the fault trace, was excavated on Decem-ber 12, 1973, to a depth of 7 feet to 8 feet in clay, and was carried north-westerly for about 50 feet until collapse of the trench walls terminated the work. This trench exposed a thin, flat-lying laminated sand-silt layer in the clay at a depth of about 6 feet. This sand-silt layer generally resembled that found in Trench 1, although the layer was saturated in Trench 2, and small springs issued from it locally when cut by the backhoe bucket.
- 3. Trench 3 Trench 3 was excavated across the fault zone from south to north on February 26-27, 1974, for a total length of 435 feet and to an average depth of about 7 feet. The trench was cut in olive-gray clay which was internally
9 massive, but which had a thick-bedded characteristic which permitted measuring the gentle undulating layering structure in the clay. Strike-and-dip plots of these layering features are shown in plan on Plate 2, and the projected layering of the clay is shown schematically in profile on Plate 4.
In addition to gross layering structure seen in the clay throughout the length of the trench, a 2-inch to 4-inch laminated fine sand and silt layer was identified within the clay overlying the footwall trace of the underlying fault zone. This sand-silt marker layer dipped northerly out of the weathered soil zone at about 100 feet north of the south end of the trench, and sloped northerly into a synclinal sag at 135 feet north of the south end of the trench, to rise back into the weathered soil zone and be lost about 170 feet north of the south end of the trench.
The structure of layering in the clay throughout Trench 2 forms gently undulating, open folds which appear generally to parallel the upper surface of the underlying outwash and marine sand deposits. No tight or abrupt folds were seen to disrupt the continuity of layering in the clay, and close examination throughout the length of the trench failed to detect any drag folding within the clay beds The clay is jointed throughout the trench area, with joints tending to change orientations to conform to changing attitudes of the broad undulations in clay layering. No slickensides or other evidence of displacement were detected on any joints in the trench. No
10 sand dikes cutting across clay layering or filling joints were found.
No offsets were found in the thin, sagged sand-silt marker horizon which was interbedded in the clay between Stations 100 and 170 in Trench 3.
Between 55 feet to 65 feet north of the south end of Trench 3, the backhoe excavated a pocket into the floor of the trench to a depth of about 14 feet, to determine whether there were any stratigraphic changes to that depth which might be useful to examine while proceeding northerly with the excavation across the fault zone. To the 14-foot depth tested, no sand layers were seen in the clay, and the pocket was backfilled to restore the trench floor to the normal 7-foot depth. Within a few moments of completing and tamping the backfill, several springs erupted from the trench floor within the backfill area, with artesian flows rising 1 inch to 2 inches above the floor of the trench. Fine gray sand suspended in the flowing waters of the several springs rapidly built sand cones several inches thick around the springs. A dam was built across the trench to the north of the springs, to protect the proposed excavation to the north from flooding, and thereafter the southern 80 feet of the trench filled to within 2 feet of ground surface, with the highly mobile fine gray sand continuing to be deposited from the springs onto the floor of the flooding trench.
- 4. Trench 4 Trench 4 was excavated on March 4, 1974; in an attempt to locate the westerly projection of the laminated sand-silt marker horizon found between
11 Stations 100 and 170 in Trench 3. A similar layer was found in Trench 4, taking the form of an open synclinal sag which plunged gently to the north-east toward Trench 3. Spoon sampling of the soils in Boring SRF-6, be-tween the two trenches, also had detected a sand-silt layer in the clay at an elevation corresponding with that which projected between the two trenches.
Various points on the sand-silt horizon in each of the two trenches were then surveyed in by McKenna Associates in order to provide lo-cations and elevations with which to define the structure of the horizon as it passed over the footwall and portions of the intensely deformed base of the Scotland Road fault. These surveyed points are designated points "A" through "J" on Plate 2. The structure of the horizon is defined in plan in an insert on Plate 2, and in profiles showing, the east wall of Trench 3 and the east and west walls of Trench 4 on Plate 4.
As shown on Plate 2, the structure of the sand-silt marker horizon takes the form of an open, doubly-plunging syncline which strikes south-westerly across the footwall of the fault. No offsets of the sand-silt layer were detected in either trench, and no abrupt folding or drag folds were detected in this layer or in the clay beds in either trench. The sand-silt layer in both trenches does not apparently thicken or show increased grain sizes toward the trough of the syncline. No sand dikes were found in Trench 4, nor were joints slickensided.
12 No evidence was found to suggest that the synclinal structure of the sand-silt layer crossing the fault in the area of Trenches 3 and 4 was formed by other than passive deformation due to differential settlement of the underlying clay. The relatively non-compressible outwash and marine sands underlying the clay in the study area are at a low elevation beneath the area of this synclinal sag, and the relatively compressible clay.
section is thick. Conversely, the sand elevation is high and the clay is thin as seen in borings put down to the north and south of the sag. With the gradual post-depositional compaction of the clay materials through time, the thicker clay sections settled more deeply than the thin clay sections, passively producing sags in the originally horizontal layering of the fine-grained clay deposits.
There is no detectable sag in the topsoil zone which overlies the synclinal sag in the sand-silt marker horizon in Trenches 3 and 4, and there is no noticeable variation in thickness of the topsoil zone in these trenches. Since the sand-silt layer does not thicken or show coarser grain sizes toward the trough of the synclinal sag, the sand-silt layer appears to have been deposited on an originally horizontal surface which lay strati-graphically above the present ground surface. Differential settlement and sagging of the sand-silt horizon must have been completed prior to the last erosional beveling of the present ground surface, presumably upon retreat of the last post-glacial marine transgression, since the topsoil zone built
13 upon this beveled horizon shows no evidence of having sagged over the sand-silt sag or over any other of the gently undulations seen in the clay layering throughout the length of Trench 3. There is no evidence of dis-ruption of any of the sedimentary layers overlying the fault zone in any of the trenches, to suggest movement on the Scotland Road fault subsequent to deposition of the overlying Pleistocene deposits.
D. Age of Pleistocene Deposits No shells or other organic materials were found in the clay in the study area with which to establish an age of deposition of the clay. The clay deposit Is, however, considered correlative with similar glacial-marine clays which blanket portions of the seaboard lowland throughout eastern New England.
Borns (1973) reports that "a major amelioration of climate began prior to 14,200 years ago which resulted in a rapid dissipation of the ice sheet in New England at least by 12,500 years ago". The recession of the ice sheet was accompanied by a marine invasion of the seaboard lowland, with deposition of glacial-marine clay sediments. Borns brackets the time of deposition of the glacial-marine clay in the region between 13,500 and 12,500 years ago.
Schafer and Hartshorn (1965) report that radiocarbon dates of shells from glacial-marine sediments on the seaboard lowland in Maine range from 11,800 to 12,800 years old. Kaye and Barghoorn (1964) have constructed
14 a curve of sea-level fluctuations for the Boston, Massachusetts, area which describes the last marine submergence as having ended about 12,500 years ago in that area.
It appears, therefore, that the glacial-marine clays of the Newbury study area are at least older than 11,800 years, and are probably in the range of 12,500 to 13,500 years old.
E. Petrographic Examinations The petrography of eight samples of drill core from borings in and adjacent to the Scotland Road fault has been described by Professor Gene Simmons and Dorothy Richter of Massachusetts Institute of Technology.
Sample Boring Depth (feet)
Description SRF-1A SRF-1 74.0 to 74.4 Amphibolite breccia SRF-2A SRF-2 60.0 to 60.4 MyIonized quartz-muscovite schist SRF-2B SRF-2 72.9 to 73.4 Brecciated quartz-muscovite schist SRF-3A SRF-3 67.0 to 67.5 Muscovite mylonite SRF-4A SRF-4 92.9 to 93.3 Chlorite augen gneiss SRF-5A SRF-5 42.1 to 42.6 Sheared granodiortie SRF-5B SRF-5 175.1 to 175.6 Altered olivine basalt SRF-7A SRF-7 115.9 to 116.4 Ultramylonite Simmons and Richter conclude from their studies that "the samples (with the exception of sample SRF-5B) all show evidence of dynamic defor-mation; that is, cataclasis, brecciation and intense crushing--all probably due to motion along the fault. The deformation clearly took place after the regional metamorphism of the rocks (which was probably associated with the Devonian Acadian orogeny). The microcracks produced in the deformational
15 events appear in thin section to have either annealed, or have been filled by secondary minerals. There is no firm petrographic evidence of recent deformation of these samples". The complete text of the Simmons and Richter report is attached herewith.
A further indication of the old age of deformation of the fault zone is evidenced by sample SRF-5B, from a diabase dike which is enclosed within deformed rocks of the fault zone. Petrographically the dike is seen to be completely undeformed. The dike has been dated radiometrically (K-Ar) at 199+/-9 million years.
F. Radiometric Age Dating K-Ar age determination have been obtained on six samples of drill core from borings in and adjacent to the Scotland Road fault by Geochron Laboratories, Division of Krueger Enterprises, Inc., Cambridge, Massachusetts.
Sample Boring Depth (feet)
Material Age SRF-5A SRF-5 42.1 to 42.6 whole rock 272 10 M.Y.
SRF-3A SRF-3 67.0 to 67.5 whole rock 269 10 M.Y.
SRF-2A SRF-2 60.0 to 60.4 whole rock 256 10 M.Y.
SRF-8A SRF-8 155.6 to 156.0 sericite/
feldspar 248 9 M.Y.
SRF-1A SRF-1 74.0 to 74.4 amphibole 324 14 M.Y.
SRF-5B SRF-5 175.1 to 175.6 whole rock 199 9 M.Y.
Samples SRF-5A 1 -3A, -2A, and -8A are from within the fault zone; SRF-1A is from the diorite/schist complex which lies to the south of the fault zone; SRF-5B is from an undeformed diabase dike which is enclosed within deformed rocks of the fault zone (see Plate 3). Of apparent geologic
16 interest is the fact that radiometric ages increase progressively with distance from the footwall of the fault zone. SRF-8A is from about 5 feet above the mylonite band near the footwall of the fault, whole SRF-5A is in relatively undeformed granodiorite about 250 feet stratigraphically above the footwall. Radiometric dating of rocks within the Scotland Road fault zone indicates that the fault is of Permian age, and suggests that deforma-tion in the zone may have been active through a period of as much as 20 million years. The dike (SRF-5B) which intruded the fault zone is com-pletely undeformed, indicating that movement on the fault had ceased by Triassic time.
IV. CONCLUSIONS The Scotland Road fault has been located within 150 feet of the lo-cation inferred by A. F. Shride on the basis of his regional field studies.
Nine core borings have defined the fault zone as being about 300 feet thick and dipping at about 44° to the north adjacent to Scotland Road in Newbury, Massachusetts. Chemical alteration and mechanical deformation in the fault zone increases progressively from north to south across the fault zone, and alteration effects of faulting terminate abruptly at the footwall of the fault zone, about 5 feet stratigraphically below a thin mylonite band. The fault is a feature of major geological significance in the region.
The fault is geologically very old, of early to middle Permian age, and the altered and deformed bedrock materials in the fault zone are annealed and compact. No unconsolidated gouge, shear zones or polished joint surfaces
were detected in cores from borings drilled across the width of the fault zone. The bedrock surface overlying the fault zone slopes gradually up to undeformed bedrock outcrops at the north edge of the fault zone, and appears from refraction seismic surveys and borings data to be smooth and sub-planar, with no detectable topographic anomalies.
Surficial materials overlying the fault zone include glacial till, glacial outwash and marine sands, and glacial-marine clays, all of Pleistocene age. The youngest of these Pleistocene deposits are the glacial-marine clays, estimated from regional studies to be older than 11,800 years. A thin, essentially horizontal layer of post-Pleistocene topsoil covers the glacial-marine clay in the area.
Examination of the glacial-marine clay in four trenches excavated over the area of the fault zone failed to detect any evidence of tectonic fault displacement in the clay and its interbedded sand-silt layers. Bedding in the clay displayed no abrupt monoclinal or drag folds. Joints were not slickensided. The thin laminated sand-silt horizons interbedded in the clay were not offset. No sand dikes were found in the clay, which directly overlies deposits of highly mobile fine sand.
All evidence observed in the current investigations indicate that Pleistocene deposits overlying the Scotland Road fault have not been sub-jected to disruption by tectonic faulting.
John R. Rand Consulting Geologist
References:
Borns, H. W., Jr. (1973) Late Wisconsin Fluctuations of the Laurentide Ice Sheet in Southern and Eastern New England. in The Wiscon-sinan Stage; Geological Society of America, Memoir 136; Boulder, Colorado.
Kaye, C. A. and E. S. Barghoorn (1964) Late Quarternary Sea-Level Change and Crustal Rise at Boston, Massachusetts, with Notes on the Autocompaction of Peat. Geological Society of America, Bulletin Vol. 75, 63-80.
Schafer, J. P. and J. H. Hartshorn (1965) The Quaternary of New England.
in The Quaternary of the United States; Princeton University Press; Princeton, New Jersey.
Shride, A. F. (1971) Igneous Rocks of the Seabrook, New Hampshire-Newbury, Massachusetts, Area. in Guidebook for Field Trips in Central New Hampshire and Contiguous Areas. New England Inter-collegiate Geological Conference - 1971.
NOTE: The study area was visited on March 13, 1974, by M. H. Pease, Jr.
and P. J. Barosh, U. S. Geological Survey, Boston. Trenches 3 and 4 were inspected. The trenches were thereupon filled in.
18
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"" DEC. 17, cows. R. rE 6, IICX SO 73-1012 100x No 9.9 KALI ssiE puu,
OUTCROP
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441 44.*V.0%*
Newbury Port e
granodiorit SRF-5 GEOLOGIC MAP-SCOTLAND ROAD FAULT on property of MARION H. MARSHALL ESTATE NEWBURY, MASSACHUSETTS for PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE by John R. Rand Consulting Geologist 6'13 - 74 STUCTURE CONTOURS ESTIMATED FOR A LAMINATED SANDY SILT BED WHICH OVERLIES THE FAULT TRACE TRENCH 1 Zone of intermittent, local bedrock deformation
--SRF-40-50 1 SRF-3
° Zone of pervasive, moderate bedrock deformation TRENCH 3 N-%
ow moi c.o..0
- Zone of extreme bedrock deformation - welded breccia EST 1.1v121F,...DOL:11-1,EFOOTIVALl..
---OF THE SCOTLAND ROAD FAULT ZONE TRENCH 2 TRENCH 4 SRF-4 No apparent bedrock alteration due to Scotland Road Fault
\\TAG 10..12 diorl e
9.011, k 5 e
Unnamd
\\, and 05 5 '
10`C
$ c hi s t
\\\\
0 SRF-10 Diamond Drill Hole 40-60 I 7z, 0
Strike (1 Dip of Bedrock Foliation Averaged from Oriented Drill Core Strike Dip of Bedding mapped in Surficial Clays and Silts
\\,--*
0' 100' 200' BASE Si"( a PLAN" -M RE NNA ASSOC IATES LPL_ATi"--21 J. r 7.3- '012 1,-.17,73 REV.
. NW 248 my R-Ar age, million years SRF-BA Drill Core sample SE I
SCOTLAND ROAD FAULT ZONE L
0 0 PLATE or 10 IL L-W cr m
-200' 50' 100' INTERMITTENT LOCAL DEFORMATION 256 my ssF sRF ;As SRF-4A
,f)
WOODED AREA rt
-272 my SRF-5A SRF-S8 Newbury port Granodiorite
-100'
)99 my (dike)',
Unnamed Diorite and Schist 020RoCK OUTCROP
'7) cz
- SO' ROAD
- 0' on ASSUMED MEAN SEA LEVEL 269 my
- s Glacial-marine Clay Sand-Variable Textures "Elf diArit ----------
324 my
-150' PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE by John R. Rend, Consulting Geologist E111
- £7 GEOLOGIC PROFILE -SCOTLAND ROAD FAULT on property of MARION H. MARSHALL ESTATE NEWBURY, MASSACHUSETTS 1-------1 Layering In clay IA, B.C. LTC. z laminated Sandy Sill Marker Horizon I SURFICIAL DEPOSITS AND TRENCHES over the Silly clay I
I SCOTLAND ROAD FAULT ZONE
\\
6 9
20' on property of MARION H. MARSHALL ESTATE NEWBURY, MASSACHUSETTS for
[7......:1 Fine silly sand r:;,:,::::::1 Pole to medium sand IL
_TOPSO
,r-
,..-.--1......_...._*E TRENCH 4 WEST WALL Medium to coarse sans' PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE V.,?:"*,..1 Gravel 20 9
by John R. Rand Consulting Geologist 1;,,FO'd Boulders 9
_TOPSOIL
..r.
6 74 IC TRENCH 4 0'
50' EAST WALL I PLATE 4 I 20 16 I
"I-
. 'TOPSOIL a
5.--'-'1--,
Springs
--._ TRENCH 3 10' t;'),6) 77:77, 7 ',.,r,..-.---,,,,.--..*-,,,
EAST WALL SE ft, NW
,t+;
lie 4.,,,*
m GROUND SURFACE Slit! flOIGlyrae y-g sraiyilySiclt ly oClay ASSUMED MEAN SEA LEVEL 0'-
..: E.i' I. iviAi: ED-ElE-DROCH SURFACE N.*.
N\\
Moderate Deformation N
..'.:ii *..*
OUT WASH
- '.:**-
- s. *
--:.*.:-,...:.,L.........:-......*........t.s*-
- ._*_t.
°C> b _ N.,.
l'eNN.
No Apparent Alteration due to Scotland Road Fault xso.
44.<
Ot'a
- re,...> e.
N.,..
MARINE
.t:re......g.v....'*.i:Y.e.r..r*Xt?"'1,01s
.`"*.e=%-
Extreme Deformation - Welded Breccia
- ,:":-."`i".;
N,,,
ATTACHMENT No. 1 SEISMIC REFRACTION SURVEY SCOTLAND ROAD FAULT ZONE NEWBURY, MASSACHUSETTS WESTON GEOPHYSICAL ENGINEERS, INC.
for PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE
SEISMIC REFRACTION SURVEY SCOTLAND ROAD FAULT ZONE NEWBURY, MASSACHUSETTS for PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE WESTON GEOPHYSICAL ENGINEERS, INC.
WESTON, MASSACHUSETTS
SEISMIC REFRACTION SURVEY SCOTLAND ROAD FAULT ZONE NEWBURY, MASSACHUSETTS INTRODUCTION A seismic refraction survey was conducted across the mapped lo-cation of the Scotland Road fault, as originally mapped by A. F. Shride (1971) and shown on Figure 1 and Plate 2 of_ the report. Seismic field work took place during the period of November 5 through 19, 1973. The location of this survey is shown on Figure 1 of this attachment.
The general purpose of this work was to determine thicknesses of overburden and weathered rock materials as well as the velocities of the venous geologic materials existing at this location.
RESULTS The results of this refraction survey are shown on a profile of the bedrock surface (Figure 2) Also shown on this profile are overburden and bedrock seismic velocities, boring locations, and bedrock depths as found from borings as well as the fault zone, as indicated by J. R. Rand.
-.2-The bedrock surface, as interpreted from seismic data, does not have any sharp breaks indicating faulting. The seismic velocities of the bedrock do not change sufficiently along the 1,000-foot line of investigation to indicate the presence of any significant bedrock anomaly.
The fault zone does not exhibit significant velocity differences from the adjacent bedrock.
t 00 zoo 300 400 boc.
- --r-SEISMIC LINE LOCATIONS SCOTLAND ROAD FAULT PUBLIC SERVICE CO. of NEW HAMPSHIRE SEABROOK NUCLEAR STATION Figure *I
1+0 3+0 2+0 5+0 4+0 9+0 20001:FT./SEC.
SRF-7 SRF-3 SRF-8 SRF-2 2000 /FT./SEC.
SRF-9 SRF-6 0+0 SRF-4 SRF-1 10+0 EL.450 8+0 SRF -5 EL. +50 17,000/FT./SEC.
16,500-18,000 FT./SEC.
-- INTERMITTENT LOCAL DEFORMATION 15,000 FT./SEC.
S.CV SCOTLAND ROA9vFAULT ZONE 0,7 MODERATE DEFORMATION 0
0 50 15,000 -16,000 FT./ SEC.,/
14,500 FT./SEC.
0 INTENSE DEFT-IATION /4"--- NO APPARANT 'DEFORMATION 7+0 6+0 15,50.0 FT. /SEC.
SRF -5 WOODED NEWBURYPORT OUTCROPS SRF-7 SRF-3 LINE A SRF-8 SRF-2 SRF-9 SRF-6 SRF-4 0+0 50' LINE A SEISMIC REFRACTION SURVEY SCOTLAND ROAD FAULT AREA NEWBURY, MASSACHUSETTS for PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE by WESTON GEOPHYSICAL ENGINEER, INC.
Figure 2
ATTACHMENT No. 2 GEOLOGIC AND SOILS LOGS OF BORINGS SRF-1 THROUGH SRF-9
BORING LOCATION See Scotland Rd. site plan INCLINATION Vertical BEARING DATE START/FINISH Dec. 4. 1973
/ Dec. 6. 1971 CASING ID 3 in.
CORE SIZE 1-7/8 In TOTAL DEPTH 69.0 ft DRILLED BY American Drilling 1, Boring Co.; W. Marion GROUND EL (MSL) 18.1 ft DEPTH TO WATER/DATE 0.5 ft /
Dec. 28, 1973 LOGGED BY Soil - K. Polk; Rock - J. R. Rand EL.
SAMPLE RATE WATER orflQD CONTENT PRESSURE TEST STRIKE, DIP F
- Foliation p.,
SOIL AND ROCK DESCRIPTIONS x
el 1481.
ft Depth ft Type and No.
N or Rec.
OF
- ADV, mm/ft Graphic SO_
pa 1 Compute
, k 10-' cm/see J -joint C
- Contact B = Bedding (Weathering, defecte, etc.)
(Type, texture, mineralogy, Q 14 color, hardness, etc.)
' in 18.1
' ' 1 )0 S = Slickenside 0.r:
-20 *- - -,
7 21 29 30 31 5
33.5 29.4 32.3 31.9 32.4 34.9 37.8 7
laucticc gray, olive-gray, and brown silty clay. Low plastioity;w> I. L.; s(tor)=.60 tat
'Slightly mottled gray & olive brown silty clay. Low to med. plasticity. a 0011> 1,Olaf Olive-brown silty clay. Low to medium plasticity; w > P. L. s u itor) > " 1.0 tsf Similar to Sample 53. a dor) > 1.0 tot Similar to 83, but someAat softer; contains few gray epots to 8 ram. s u (tor) = 0.95 tat Similar to S3, but softer; some gray spots. a (tor) = 0.65 tsf Similar to Sample S3, but medium stiff; contrails a gray silt layer < 0.5 mm thick; color varies slightly olive-brown to olive-gray. sitor) = 0.34 tat 13.0 720 r 730 =
7 E
- -40 r-
- 1..,
7 E
1...
--mot
[s10 S8 SO 511 51*
212 513 814 SIS Sl6A 10 9/6" 19 24 26 31 17 59 TOP TOP OF TILL OF ROCK 7
Gray layered silty clay and clayey fine sand. Silty clay in noft; medium to high plasti-city; slightly sticky; very soft when remolded. Layers vary 0.5-10 mm.s ultor) = 0.221 Gray silty fine sand. Uniform; fines are nonplaetic; very fast reaction to shaking test.
Similar to Sample SO, but aleo contains a few gray clay layers 1-2 mm thick.
Similar to Sample 39, but also contains some gray clay layers.
Brown silty fine sand. Uniform; fines are nonelastic; contains a few rusty-brown fine sand layers.
Brown slightly silty fine to medium sand. Uniform; fines are nonelastic; contains a layer of gray clayey gravelly sand with subrounded gravel up to 20 ram in size.
Brown very slightly silty uniform fine to medium sand.
Light brown silty fine sand. Uniform; fines are nonelastic; contains a few subrounded coarse sand grains and some rusty-brown medium eand layers.
Similar to Sample 814.
Similar to Sample 314.
Gray-brown silty sandy gravel. Widely graded; angular grains; contains grave pieces up to 30 mm in size; fines are nonelastic.
Light gray fine to medium sand. Uniform; angglar to subrounded grains; clean.
Light gray silty sandy gravel. Angular grains; appears to decomposed rock and rook fragments up to 30 mm in size.
Gray silty gravelly fine sand. Uniform; tines are nonelastic; contains angular gravel pieces up toll mm in size.
Cored boulders.
- -60
-69.0 S18B r-SI 7A C 817B 818 NX-1 NX-2 15/6" 79 28/6" 92/6" 4;
100 3 n
-70 Z..-
NX-3 NX-4 93 98
- 4. 2 3.6 43 83
- j. 75° Joint Fresh and hard. Drills Clean well. Only very alight surface wx effects on 75° Joint Joints and partings.
Minor wx
.ao
.d
, 4 a.
-'--'-'1
°!... a.
Diorite. Dark gray with large (?)horn blend cyrstals (1/2") in fine-grained quartz diorite matrix.
6 a, Gradational contact - fused.
Diorite. assive,fine-grained,dk gr
-'a Z.
-7 7_
r BOTTOM OF BORING N - Standard penetration resistance, blows/ft Ron - Length recovered/length cored, %
RQD - Length of sound core 4 in. and larger/length cored, %
S - Split spoon sample
- Groundwater U - Undisturbed samples S - Shelby tuba N - Denison F-Fixed piston P - Pitcher 0- Osterberg G - GEI D - Drilling break k - Coefficient of we - Weathered, weathering permeability NOTES
- 1) - niler)
- Shear strength measured a
with Torvane.
SEABROOK STATION PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY U utbad ongInsess.taaorwparsoa RIM' January 10, 1974 Project 7280 PAGE 1 of 1 I LOG OF BORING SR F 1 (t) 0110TICHNICAL ISNOINIC0718
BORING LOCATION See Scotland Rd. site plan INCLINATION Vertical BEARING DATE START/FINISH Dec. 7, 1973 / Dec. 10, 1973 CASING ID 3 in, CORE SIZE 2-118 to 1-5/8 TOTAL DEPTH 77.5 ft DRILLED BY American Drill. & Boring Cc. 1W, Mann. R.Lamourak GROUND EL (MSL) 17.6 ft DEPTH TO WATER/DATE 0.0 ft / Dec. 31, 1973 LOGGED BY Soil - K. Polk: Rock J. R. Rand EL.
pal.,
ft SAMPLE RATE OF
- ADV, min/ft WATER or RQD CONTENT PRESSURE TEST STRIKE, DIP F. Foliation J =Joint C. Contact B = Bedding al 11 SOIL AND ROCK DESCRIPTIONS 0 r11 (Weathering, defects, etc.)
(Type, texture, mineralogy, 8.
color, lukrdnese, eto.)
61 Depth ft Type and No.
or Rec.
Graphic PM.
pal Computed k
10 'cm/sec
- 17. 6 S = SI ickenside 0
-20.:
-so s.:77.5
,7 [
- --20 r
- L SIR 14 9 "
li itgsprriammovirliaM1M1.41:11110370t11.,
IVITMOISSIIM:1771 11, 111114111MIN a ve lgranaffty0clay. 010.,o 0w 'It: m R7g umruspras.t'fcTtny; aw)711. L. ; -n4or) >LP 5 fr 2)
- 8 Similar to Sample 53, but fewer brown spots; gray streaks te ar mm. su itorl> 1.0 to(
Similar to Sa,but fewer brown apots;more gray streakemomewhat softer. s (tor)=.90ta Olive-brown silty clay. Low to medium plasticity. a u(tor) = 0.50 tsf u Similar to 86, but no dark brown spots; soft to medium stiff; slightly sticky.
au(tor) = 0,23-0.30 tat Gray to olive-gray silty clay. Very soft to °oft; medium to high plasticity; slightly
.sticky. se nor) = 0.15 tat Similar to Sample 08. su itor) -0.10 tef i.24. 0j--
93 S4 85 86 57 88 S9 26 24 13 5
5 2
0
- 29. 0 30.1 33.8 35.6 35.5 49.5 52,5 37.8 TOP OF SAND
-30 7
-40 Z..50
- 5k5
-60
-70 E S10 C 511 C 912 E 513 C S14 NX-I 7
10 13 4
8 93 1)22 TOP OF ROCK Gray very silty fine sand. Uniform; fines are generally gray clay pockets up to 8 mm in size.
Similar to Sample 510.
Gray-brown fine to medium sand. Uniform; subrounded Light gray fine sand. Uniform; clean; contains Similar to Sample 813.
o 0 *=
nonplastie, but contains a few grains; clean.
one 8 mm size subrounded piece gravel NX-2 NX-3
- BX-4 BX-5 13X-6 100 100 100 100 100 4.7 2.6 2.0 32 23 67 55 100 520
49-53° 450 550 46° 46° 47 0
40 42° i No slickensides Not notably wx. Altered S. by metamorphic prooese
.5.1
\\,,4 \\
- .,,N..
- V ***.`
° `,\\N Cataclastic rock. Mottled light yellowish green, fine-grained matrix. Foliated with rounded pebble-like breccia, and sworle feldspethie and chloritic foil-ations. Thin feldspathic string-era and irregular veinlets dip 35° to 40° opposite to dip of loll-altos. Cross-stringera.
Cross-stringers ripy Trif
_ 1
-- n
- f 7 aN
- 4,
- g*
to light yellow green color. Not s I tokens !clod.
r
'85° 50° Joint Fresh. Drills well. Part Min r t
logs and some high-angt,..s, '
Minor 1* joints show crusty ear- \\;,..Y.V.
' Joint face wx effects. No slick;\\,*0NZN:\\
Irregular ensidee or other recent 'N-:** '
\\s' 60 o Joint, striated movements.
Not s I ickens Med 1..
Clean joints
1.,A 1
.7 BOTTOM OF BORING 7
e r, i 0
N - Standard penetration resistance, blows/ft Reo - Length reeovered/length cored, %
RQD - Length of sound core 4 in. and longer/length cored, %
s
- Split spoon sample
- Groundwater I i
- Undliturbed samples 9 - Shelby bibs N - Dantean F-Fixed piston P - Pitcher 0- Osterberg G - GEI 13 - Drilling break k - Coefficient of vrx
- Weathered, weathering permeability NOTES
- 1) Cored two boulders from 47.5 ft to 50.5 ft.
2) suffor) =Shear strength measured with Torvane
- 3) SI A =146.2, SIB -31.7
- 4) Rate of advance not available for NX-1 through 3.
SEABROOK STATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY U treed engineers a aoreevolon irc Date: January 10, 1974 Project 7286 PAGE I of 1 I LOG OF BORING SRF 2
- 41) orars,-tkencex BINOINICIAll INC.
BORING LOCATION See Scotland Rd. site plan INCLINATION Vertical BEARING DATE START/FINISH Dec. 11, 1973
/
Dec. 19, 1973 CASING ID 3 In.
CORE SIZE 2-1/8 to 1-7/8 In.
TOTAL DEPTH 95.0 ft DRILLED BY American Drilling & Boring Co.; Manes GROUND EL awn) 17.9 ft DEPTH TO WATER/DATE
- 0. 0 ft / Dec. 31, 1973 LOGGED BY Soil - K. Polk; Rock - J. R. Rand Q g color, hardness, etc.)
EL.
MSL ft SAMPLE BAIT OF
- ADV, min/ft WATER or RQD CONTENT PRESSURE TEST STRIKE, DIP F = Foliation J tr. Joint C = Contact B = Bedding ui in x SOIL AND ROCK DESCRIPTIONS
.0
- IS (Weathering, defects, etc.)
(Type, texture, mineralogy,
.. B Graphic ISP.M psi Computed A k 10 cm/ase Depth ft Type and No.
N or Rec.
111f/11f II 00 S.Slickenstd 17.9
-20
-40
-60 CI 1 2 1S3 154 Its '
- S7A 11 913 l
9 1510 4
19 33 9
7 2/6" 2
3 2
.,j,,,,
29.1 27.8 36.3 37,7 45,0 43.5 55,9 55.4
- 50. 94 36.3 TOP OF SAND 7.
7 1-011501.17 mottled brown and gray peaty silty clay. Low plaeticity. s u(tor) =0.60 tot 1)
Mottled olive-gray and runty brown silty clay. Low plasticity; w >..P. L. s u rtor)=0.90ta Sri% to Sample S2. s utt?r> 1.0 taf 0 ive-rown al t clay. k e ium plasticity; w> P. L.* a (tor) = 0.80 tsf Similar to Stung? 54, but contains several slit Inters ** 0951nm thick.*s u gor) = 0.48 taf Similar to Si, but medium atilt; contains ;revere! very thin riot lavers. a itorl = 0.45 to Olive-brown to gray silty clay. Slightly sticky; so (tob) =0.12-0.17 elf It Gray silty clay. Very soft to soft; medium plarttl6ity; sticky. s u (tor) = 0.10 taf Similar to Sample 87A. su (tar) = 0.12 tel.
Similar to Sample 87A. au ftor) = 0.15-0.19 taf Similar to Sample S7A, but also contains a few silt layers < 0.5 mm thick; color varies slightly lighter and darker. s gorl -0.18 tot 1.12 1
16 8
TOP OF TILL Gray layered soft silty clay and silty fine sand. Layers are 1-5 mm thick.
Gray silty fine sand. Uniform; fines are nonplaatic*
very fast reaction to shaking test; contains a few gray clay lavers up to 5 mm thick.
38.0 0
B.1 3 57
.e*
TOP OF ROCK Gray-green silty angular rock fragments up to 30 mm Ionize.
seen*, to '(smote S13. hut lam,. oboes Annpnra I, hp rioenmpnrarl rrsnl.
42 0
1:,
0 X-1 I X-2 I X -3 I X-4 I NX-5 INX-6 1NQ-7 Q-8, Q-9 it Q-10 Q-11 97 97 100 100 100 100 100 100 95 100 100 3.0 3.2 4.0 3.8
- 4. 2 4.0 3) 43 47 77 87 75 82 68 52 72 63 A
WA Vii ii Ift 11 iI i
1 FA N
67 2)
N50E, 31114W 10 N83W, 46NE J NOSE, 511,11N F tnn: mg N NW, WO 13 MM: ME 5 N 9W, 4NE
.!I i/
f150Joint joint-rustY Fairly fresh (as for wx) 45
° minor wx but is altered, presum-ably hydrotherrnally, to Vuggy a light gray-green to tan 40° joint green color. Joints show slight rusty wx effects.
Fresh, but altered hydro-thermally to light green-Intl (epirlote) gray. Joints and partinga are not altokenslcied, not pallahec Rough Driller Fresh, but altered hydro-ground thermally. QUart7./PYritE mineralization conforms to foliation. Joints are 61t not slickensided.
0 join Rough surface fresh, but altered.,
Fair y Joints not slickensided o polished.
l';'*-li Altered diorite I?). Fine-s", a grained, light gray-green p.'..
matrix with medium-grained Tan al.w.s==
.....\\"
..2
..,.,`,.,-.
- .\\:44
- \\..'....%';,.
- "..r7-
.., `:...*
1.2.-.;_
- -"":°°920
-,7.,
cls-,
x.;\\\\**.....
N N Ns.
`...., 4.
'(
`*.
..1\\ 'll 1
\\`.
feldspar phenocrysts. Sense diabase of vague foliation throughout.
Quartz-Pink feldspar 61.5.
- r.,., te Fault block (?) Fused, tight r'9."9 Claystone contacts-notable el:do:it:A(7.0N° strong foliation. Fine-grainy.
to.very tine-grained. locally Spidote _o I Ids p,,
thized light gray to Altered diorite (?). Moder-ately foliated, saussurItized feldspar phenocrysts in fine-pyrit e grained matrix. Appears to be moderately foliated New-buryport Diorite.
95 BOTTOM OF BORING 7
2 in 0
N N - Standard penetration reaietance, blows/ft Bee - Length recovered/length cored, %
RQD - Length of 'round core 4 in. and longer/length cored, %
s
-Spilt spoon sample g Groundwater U - Undisturbed samples s - Shelby tube N - Denison F-Fixed platen P - Pitcher 0- Osterberg G - GEI D - Drilling break 14 - Coefficient of ax - Weathered, weathering Permeability NOTES 1) su (tor) =Shear strength measured with Torvane.
2)
This is only a partial list of dip and strike data.
31 Rate of advance not available for NQ-8 through NQ-11.
.. Used 300 lb hammer.
SEABROOK STATIC) N PUBLIC SERVICE COMPANY OF NEW HAMPSH/RE YANKEE ATOMIC ELECTRIC COMPANY el uKed engineers. -,.
Date: February 13, 1974
- Project 7288 PAGE I of 1 I LOG OF BORING SR F 3 (11) 007rIICHNIC5L IINCIINCH58 OC
BORING LOCATION See Scotland Rd. site plan INCLINATION Vertical BEARING DATE START/FINISH Dec. 20, 1973
/ Jan. 3, 1974 CASING ID 3 In.
CORE SIZE 2-1/8 to 1-7/8 in.
TOTAL DEPTH 95.0 It DRILLED BY American Drilling F.: Boring Co.; W. Mance:
GROUND EL (MSL) 17. 5 ft DEPTH TO WATER/DATE 0.0 ft / Jan, 2, 1974 LOGGED 13? Soil - K. Polk; Rock - J. It. nAlla EL.
MSL ft SAMPLE RATE OF
- ADV, min/ft WATER or RQD CONTENT PRESSURE TEST STRIKE, DIP F = Foliation J = Joint C = Contact B = Bedding j,.; Q SOIL AND ROCK DESCRIPTIONS ix,*1 (Weathering, defects, etc.)
(Type, texture, mineralogy, 00 Cd color, hardness, etc.)
al Graphic gpra psi Computed
., k 10' cm/see Depth ft Type and No.
N or Rec.
- 07. 6 111,111i1 1,00 S ',. Stlekenalli 0
-20
-40
-6
.10
-,f si ALA S
S4 S5 06 57 S8 1 106 17 31 fi 9
11 13 21.0
- 28. 0
- 30. 7
- 33. 7 40.8
- 38. 5 41.3 33.0 r
TOP OF SAND SI -Deck brnoweaty. p topitiaosili. iS I la' rborootw.n, olive-mbronwn,aanwd agroaye spy clay.
Med.
ive-b riff t stiff; lo
. t e IL, c tat. S. 5m I di ; b li (Mr = 0,75 tel. )b2-Similar o Sir., but_ very stlf.f: somewhat blocky, Flerne layering; e
0 w slightly above PL. s (tor) 1.0 tst 03-olrown silty clay, Vry at low to ToetZuNiallirTi*vicMR,We'eutrO blocky, I niti."°srl (Zolr; tf.f0 14 iSeellrivt: Dronyglies?13t3) '41131'.
Medium stiff ro a S
tt..; -Similar me,,ium past cfr; cc:Maine several dark brown spots.
a (tor) 0
=, b2 ter e o Same e 65. au(tor) = 0.45 tot 07-Similar to Sample SE su itor) - 0.35 tat Gra silt cia Medium stiff. medium to hi.h laiiiteit ' contains some slit fine sand
-20 rL 7 [
-30 r
- L
- 34.0 SO sin 011 10 so 34 TOP OF TILL layer) up toll met thick nea r bottom. 09 (tor) = 0.30 trif Light grey silty fine riand. Uniform; fines are nonelastic; very fast reaction to shaking test; contninn a few cloy layers up to 1 mm thick.
Similar to Sample SO, but containe clay layers up to 5 mm thick.
Brown medium to coarse sand. Uniform; subrounded grains; contains a few olive-bro clay layers up to 8 elm thick and a few gravel pieces up toll rem in size.
7 ES12
- -40 r
- L513
-So rL CS1fi S15 15 17 18 9
15.
[s14 OF ROCK g
)2, n
E
.g,,,i g-,
=
7,\\
1"
,Striated Gray-brown silty gravelly sand. Widely graded; are nonelastic; contains a few gravel pieces up to Brown gravelly silty sand. Widely graded; subrounded loins a few gravel pieces op to 20 mm in size.
Similar to Sample 813, but also contains subangular Similar to Sample 013, but clean.
Brown medium nand. Uniform; sub -rounded grains; Rusty
..1s.,
Runty Fresh internally. LocallyN -,,,,,
Ile is subject to severe ox, C\\,,,
i,
,.s.
softening. Parts on foil-,\\,\\,
ation. Not slIckenskied. )\\ \\\\
Chlorite
\\\\).i
" \\
Fault-narrow Fresh. Closely broken onN.,,N 4Z, high-angle (einte or no
\\., \\ \\
partings on high-angle
",..\\\\,\\
02.5 folintion. Fresh, not ax. :,.'s*-,*\\,
Faulted 8 5.0
\\,..\\.\\
\\\\ <
,,,. \\.4,`,,
\\
u
- =i*..
subangular to subrounded grains; fines 20 mom in size.
grains; fines are nonplastle; con grains.
clean.
Schist. Feldspathic, fine-grained medium dark gray fel i-alien matrix with disaem(nated medium-grained feldspars. Not altered. May be foliated diorite Apparent narrow fault zones or shears et 77', 82.5-85' and 88.
linve feldspar stringers, and micaceous "gouge".
Feldspar veining Sense of drag-told apparent faulted zone 82.5-85' lag at 90.6 ft is up.
-60
-70
=440 96 NX -I NX-2 NX-3 NX-4 NX-5 NX-fi
,, NQ-8 SNO-9
-90 ion 77 inn 83 100 100 100 Si 100 3, 6 5.7 3.1 4.0 3.0 2.8 2) 0 0
14 0
0 33 7
45 0
N2OW, 44NW.
N 2E, 44SE J NNW, fiONE J NOW. 55NE J II Fir/
7
/
DI rif r
BOTTOM OF BORING e
0 N
N - Standard penetration roe istance, blows/ft Reo - Length recovered/length cored, %
RQD - Length of sound core 4 in. and longer/length cored, %
s
_ Split spoon sample
- g. Groandweter I) - Undisturbed samples s - Shelby tube N - Denbson F-Fixed piston P - Pitcher 0- Osterberg G - GEI D - Drilling break k - Coefficient of out - Weathered, weathering permeability NOTES
- 1) s (tar) =Shear strength meftsured 0
with Teri/env
- 2) Rate of advance not available for NQ-7 to 9.
. - Used 300 lb hammer x - Oriented core SEABROOK ST ATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY.
C. wited engineers a cm....0.1 11 Date: January 10, 1974 Project 7280 PAGE 1 of 1 I LOG OF BORING RIF 4 (I) GHOTISCHNICAL SNOININS14.0 INC.
BORING LOCATION See Scotland Road site Man INCLINATION 45 - 46" RF.ARINC 030E DA VE START/FINISH December 26, 1973 / January st, 1974 I)
CASING ID 3 in.
CORE SIZE 1-7/0 in, TOTAL DEPTH 197.7 ft DRILLED 11Y American Drilling 40 Poring Co., T. Canning.
GROUND EL (MSL) 17,1 ft DEPTH TO WATER/DATE 0.0 It / Dec. "6. 1973 LOGGED BY Soil - K. Polk; Rock -,I. It. Rand EL.
SAMPLE RATE WATER ROD CONTENT " -
PRESSURE TEST STRIKE, DIP F i-Foliation Still, AND ROCK DESCRIPTIONS cc,
(Weathering, defects, etc.)
(Type, texture,.mineralogy, 0w celnr, hardness, etc.)
u 4,6 MSL ft Depth ft Ty pe and No.
N or Rim OF
- ADV, mm/It 7
Graphic flP.
psi Compute.
k IS cm/see J =Joint C = Contact II = Bedding 17.6 1,1111 1 1,,,
11' Slickeneld 0-::- \\_ N-11
'..7
- .10 T-20
- 30 34.0 2) 3)
None TOP OF ROCK
.1
- 14
'740
- 0
--fin
-70 ro
--90
-I"
=
-1 (
13 4
1--
_ NO-1 NQ-2 NQ-3 NQ-4 NO-5 NO-6 NQ-7 NQ-8 NQ-9 NQ-10 NQ-11 NO-12 NQ -13 NO-14 NQ-15 NQ-16 NO-17 Q-19 NQ-19 NQ-20 NQ-21 NQ-22 NQ-21 88 100 92 1 00 98 95 75 100 93 95 98 97 197 100 100 100 98 02 1 0 0 100 100 00 PA 4) 1.6 1.5 1.6 1.7 1.9 2.0 2.0 2.5 2.5 2.8 3.5 3.8 4.0 1.7 1,6 1.9 1.7 1.7 1.7 1A 1.
2.0 2.2 71 58 62 50 70 77 75 52 49 28 27 35 35 72 7
85 67 (I
79 42 32 63 4
30.
- .,5-40' 40" s
30 35° Si n
50' Moot partings Granodiorite. Typical New-7 FaFare Fresh with minor powde l
.77 are joints so effects on joint surface isg Joint surfaces are not P. '
sl tokens ided.
i Chlorite
=
5 baryport, medium-grained,.-.,
---_---, medium gray, with greenish.:
X `1., "F i gray hue, and pink feldspar :
_14 y spotting. Gene rally massive:
Locally shows foliated zones-
' S s s-Cut by fused feldspar quartz :
s 's, stringers. 13lialto speckling..
S a Recoes ellitun-f inn
-i 7
m m
- SS-Med. grained at 50', foliation de- :
2, si velops locally vogue. First=
.yr.2, Grained mechanical effects of fault
' Finer y i. v
,. zone apparently at around
,0 ; 'rain( it 1656,. _
"° ' Pyrrhetite
=0-
...,...-.7
,, a Fused fault
= X.1 poterlal
-- - ' Diorite. Medium-fine A
W
=
- -a r.;
O
=2-y Rusty joint-Strikes I-- NW Rusty loin!
Fresh. Drills rills sell. Joint and partings show minor Minor rusty surface wx effects. Not sliekensidetl.
104 1
r r A 2
. 7 g Minor rusty r.
.... a
- a Fresh. Partings locally
_ -a-show minor wx effects,
- J._
/ Minor rusty hut not slIckensided.
7 i I
-..ii
- 2
'-= Minor rusty Fresh.
Not wx, but is ermally filtered hydroth to light greenish gray A
v-7 s, s
., r.
= -
grained. bleilturn greenish -
gray. Locally foliated.
Foliation is sometimes drag-folded. Reek is mechanically deformed, up- -
FM Fr A
A
= s preaching fault-carbonate veinlets.
÷-:=
_ I. '
Fine-grnined rock, with
,',...' ChertY S,
chlo rite (?) speckling. Lo-Vein A
fom
./.......
catty foliated, cut through-out by feldspar veinlets.
i.., ;,..'
Li..'-. 10,3, Contactiopen) dips 43' FA r
47-color. Pa rt ings n re not Minor rusty slickensided.
Miner rusty Fresh anti hard. Drills well. Relatively minor hydrothermal olterni ion.
Minor rusty Illenehed Bleached Fresh nnii hard. 1,011:1 minor bleaching. I' a 1 Joints stri n ted i
Ar i
PAi V
% n a s Granodionte. Medium grained, mod r s s ium greenishgr Billay,massive. ehlorit r v v SP"NS* (not y pltered) 0,,,v,jit, Contact dips 20 fused 1(1.1.-1c1C,Injn-Al iinp.e9 ' 15 V ek S 0 s v a y 5 r.....,, s v TIL F.:"
- " A s 000 Grancrilorite. Medium-grained. Locally shoos ten-deney to foliation. Medians m
- greenish gray.
iVollated-fused CnInchistie G ranodiorite, Medium-I logs show mine r sx
'Rough not slick-effects, but are not ensided.
s I tokens !dm!.
s 9 "f,
grained, medium greenish y, grny. Fairly massive. Dar FAri 9 vt, chlorite speckling. (Chlor-
...;,-,..4 Fine lies not alteil appreciably' m
Z 1
i I n c I u a ion Minor wx e 7,-;
1 v 5 NI i 1 Minor blenched 0
tu 0
N - Standard penetration resistance, blows/ft Flee - Length recovered/length cored, "T ROD - Length of aound core 4 in. and longer/length cored. 7-S
- Split spoon sample
- Groundwater 1.1 - Undisturbed samples S Shelby bibe N - Denison F-Fixed piston P - Pitcher 0- Osterberg G - GE!
D - Drilling break k - Coefficient of wx - Weathered, weathering permeability NOTES 11 Depths noted were measured "along the boring", not verticntly 21 Washed through clay to 34.0' - no samples taken
- Roller bitted to 36.11,
31 No clay= present; therelere no water i
eentents syro letc*rnlIrs d.
.11 !toner bitted to 52.0 11.
t3EABROOK STATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY UMW engIneets
- a: retructom nc Dote, January II, I 274 Project 7286 PAGE i of 2 I LOG OF BORING SRI" Ii GEl7TECIINICAL ENGINEERS INC.
BORING LOCATION See Scotland Road Cite plan INCLINATION 45 - 46 BEARING DA PE START/FINISH December 26, 1973 / January S. 1974 CASING ID 3 in.
CORE SIZE 1-7/0 in.
TOTAL DEPTH 197.7 1) It DRILLED TlY Amerienn Drilling k Boring Co,, T, Canning.
GROUND EL (14SL) 17.6 It DEPTH TO WATER /DATE IS It /
Dee. 2(1, 197 1 1 LOGGED 111' Soil - K.. Polk; Rock - J. 11, Rand EL.
SAMPLE RAT CONTENT WATER r RQD PRESSURE TEST STRIKE., DIP F = Foliation OIL AND HOCK DESCRIPTIONS S
AN id I'M' ft Depth ft Type an d No.
N or Rec.
OF ADV.
min/ft S
Graphic Ei.PM psi Computed
-1 k 10 ein/nre J = Joint C = Contact B = Bedding CU il (Weathering, defects, etc.
1 (Type, texture, mineralogy, 0,a color, hardnegs, etc.)
0 an I (
S Slick( aside CONTINUED 11(1111 PREVIOUS PAGE
-I00_,
-120 -:
1411
-150 16 7
1 717C
--IR
-19
- 197.71-g-24 Ng-25 Ng-26
_ Ng-27 Ng-28 97 100 97 98 102 2.5 2,7 3.1 3.4 3.2 3.5 3.1 3.1 3.2 2.5 0
00 68 47 47 35 57 62 63 55 A
rig 27
- ,r, 0 30
- 10 Fresh and hard. Parting are not a I ickens Wed.
Sli ght wx Fresh and ha rd. Partings are not slickensided.
Slight wx 7---4--(cr-0
)'
x V x s T.
1, *.
b s.;
sv ). b
- b. Y
, x
))".
Chlorites a re still dark green.
Becomes vaguely foliated. Ap-pn really calacInstic. Light greenish gray.
K x sbv.
.., w rfA Ng-29 92 Ng-3 0 93 NQ-31 97 Kg-34 100 Ng-3.1 1110 A
"-*s:"...)°,...,74.2 Open contact dips 0 f,....
,,....,,i,.x4 Diabase. Dark gray,not altered.
- 3 i
- e/pen contact dips 5(1. Not slicken sided. Cataclasl ie. Li...greenish gray, fine-gra I ned, foliated.
FA a;I 181.7 1--...ty4; loused, brecciaied cimtact. Dia-FA
-.,2".
base, dark gray, unaltered.
FA IF Note: Al 171.2'
- Eresh diabase butts 77 against light green fine-grained callastly fea m: leitel stringer in diabase does not extend across into eataelasite.
Note: At 181.7', contact of diabase is boacciated, and re-cemented h calcite. Diabase is not appreci-ably altered.
BOTTOM OF BORING 1-0Z at0 N -
flee Standard penetration resistance, blows 'ft
- Length recoyered/length cored, I RQD - Length of sound core 4 In, and longer/length cored, 0 S
- Split spoon sample Z Groundwater U - Undisturbed samples -
S - Shelby tube N - Denison E-Fixed piston P - Pitcher 0- Osterberg G - GEI D - Drilling break k - Coefficient of ox - Weathered, weathering permeability NOTES U utted engineers
- Vealna-10.*,
S EABROOK STATION PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY Date: Jana. ry 11, 1974 Project 7286 PAGE 2 of 2 I LOG OF BORING SR E 5 (I) GEOTMINICAL ENCINEEM INC
BORING LOCATION See Scotland Rd. site plan INCLINATION Vertical BEARING DATE START/FINISH Jan. 4. 1974 / Jan. IL 1974 CASING ID 3 in.
CORE SIZE 1-5/8 in. RX TOTAL DEPTH AR. n ft DRILLED BY American Drilling dr Boring; Manco GROUND EL (MSL) 17.8 ft DEPTH TO WATER/DATE 0.0 ft / Jan. 30. 1074 LOGGED By Soil - K. L. Polk; Rock - J. R. Rand EL.
SAMPLE RATE WATER.,. non CONTENT ---
PRESSURE TEST STRIKE, DIP F = Foliation SOIL AND ROCK DESCRIPTIONS 4z W a '4 (Weathering, defecte, etc.)
IType, texture, mineralogy, 9Q
- t4 color, hardness, etc.)
'"' IR MSL ft Depth ft Tn.
and No.
N or Ben.
OF ADV.
twin/ft Graphic ilM.
psi Computed
.4 k 10 am/see j -Joint C e. Contact B = Bedding 17.8 f IITTIMI 100 Ft = Slielpmeide 0 -=,: -,
-A"
- ..56
.l0 -.57 7 DR
- -20
=
7 Ees.
'73° 0511 7 D12
- -9I,S1A 55 I 0 13 I/8. 3 15 18 13 a
5 3
4 5
5 5
4 TOP OF SAND -
SI-ve-b Brown organic silt. SlA - ivratrid gray and brown silty clay; low plasticity.
Diirown silty clay. Stiff to very stiff; low plasticity; somewharblocky structure.
Similar to Sample 82, but fewer brown spo(s. su itor), 1.0 tsf I)
Olive-brown silty clay. V. stiff; low to med. plasticity; w above Pb; somewhat blocky.
Similar to Sample S4. su (tor), 1.0 tsf Similar to Sample S4, but also contains some gray streaks up to 3 mm thick.
Similar to Sample 84, but medium stiff. e u (tor) = 0.45 tef.
Gray silty clay. Soft; medium plasticity; slightly sticky. (qu art].) -0.20 tat Similar to Sample 18, but More Micky. su itor) = 0.15 isf Similar to Sample SR, but more sticky. suitor) = 0.14 tat Similar to Sample S8, but more sticky. au ftor) = 0.20 ter Similar to Sample SO. su itor) = 0.25-0.30 tsf Similar to Sample SO, few silty fine aand layers to 1 mm thick. a (tor) = 0.30 tat 7 an 14 Li/6" 06%
TOP OF TILL Layered gray silty clay and silty fine sand. Clay is soR; low to u medium plasticity; in layers up to 30 mm think. Sand is uniform; in layers up to 10 mm thick.
- 46,5
- _-017
- ft-518 70 81/0 -
TOP OF ROCK Gray-brown silty medium to coarse sand. Widely graded; fines are nonplastic; sub-angular to subrounded grains; contains a few gravel pieces up to 8 mm in size.
-53 7
sa BX-1 92
- 3. 0 57 0 Minor rusty Not wx. Altered by hydro-Minor rusty thermal bleaching.
'.,;; Cataclastic, foliated. Muted
- `° t1 breccia, medium-light greenish
(\\" \\x
\\.., gray.
7 BOTTOM OF BORING 7
7 Note: Casing bent at = 14 fl while driving Note: Rock is medium-fine grained, and hole count) not accept N-groundmass contains sub-barrel far 0 ft only. Could not rounded fragments and micro-risk a second run due to caving faulted piece. All fused.
potential at base of casing.
Joints show minor rusty aortae wx effects. Not slickenaided.
142
-.1 N - Standard penetration reelatance, blows/ft Mac - Length recovered/length cored, %
RQD - Length of sound sore 4 in. and longer/length cored, %
S
- Split spoon ample Groundwater U
- Undisturbed samples s - Shelby babe N -Denison F-Fixed piston P - Pitcher 0- Osterberg 0- GE!
D
- Drilling break k-Coefficient of wx - Weathered, weathering permeability NOTES I) Su itor) Shear strength measured with Torynne SEABROOK STATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY el wand engstnears sarremnsnereale Date: March 9, 1974 Project 7286 PAGE 1
of I 1 DOG OF BORING SRF 6 (I) 019CTICHNICAL ffNOINISMAH ;me.
BORING LOCATION ;ice Scotland Road site plan INCLINATION.13" HEARING 5140 or130B T DA TE STAIIT/FIN1SH Inn. 5, 197.1
./ Jan. 10, 1974 CASING ID 3 In.
CORE SIZE 1-7/S in.
TOTAL DEPTH.
255.0 It DRILLED BY Aineriean Drilling & Boring; T. Canning, GROUND EL iNISIJ 17.5 ft LEPTII TO MATER 'DATE at It ' Jan. 18, 1971 I,IGGED BY Soil - K. Polk; Rock - J. It. Rand EL.
SAMPLE RATE
.11 Bi4D
- i. ON FENT PRESSURE TEsr STRIKE. DIP F = FoliatIm Si )1E. AND ROCK DESCRIP MONS cc z cc,..fj tWentherIng, defects, etc, )
I Tyre, texture, mineralokv, 0,,,
Crdnr, hardness, etc.)
u cx; MSL ft Depth ft Type and Na.
N or Rec.
°I.
ADV.
lin/f Graphic Arm l',I I Computed
. k III ". em /se J - Joint C.) Contact I, r, Bead ing 17.5
' 00 S Slickens it
-20 40
-60
-1I0
...10
-20 30
-40 50
-60
-615 _
2)
None TOP OP ROCK
- an
-90
-gen
- 110 120
- 480
-110 148 NQ-2 NQ-3 NQ-4 NQ-5 NQ-.0 NQ 7 NQ-8 NQ_))
i Q-10 1 Q 11 Q 12 NQ-11 NQ -11 t Q-15
( lit Q-17 92 93 100 77 100 100 93 100 97 85
£10 100 98 91 97 89 92 1.5 1.3 1 3 1. 3 1.4 1.4 2.0 2.1 1.9 2.1 2.1 2.2
... 1
- 1. Il 3,1) 2.3 2.0 12 47 13 23 0
25 55 47 12 7
55 7,1 1.1 03 13 23 wali
-70 Fib 5)
N.1 HE, 83NW.
WM;,i'Ata; :'
NI II., 05611,l'.
Ngti", mai, e.
Minor rusty Fairly fresh and -.... T'Cataclastic. Foliated, sat's-Minor rusty hard throughout but B."' a suritized, deformed diorite.
a 1' core lost altered by bleaching. -.--,- Fine to medium grnined, light Partings are not -. greenish to tannish gray.
Minor rusty sliekensitied.
._,_ Aphanitie-rya rarA r
A v' Driller broken-
.----,. yellow-green at clime Interval. Not wx. Core broken,,t,! 7 Cataelastic. Fairly fine-throughout int n 1' to -- -
4' pieces by poor - v grnined, light greenish gray.
Foliated. Apparent dark drilling.
(chlorite?) minerals scattered locally.
Diacontintious
-.,, )).
vertical joint
- --..:..t."1:.
intrusive. contact NEstrik Pr A I
, ;I Pused strikes NW
- 95.
a 1se.,r gray inn grater i
Calcite younger than alteration n Not ws. Bleached by
- v9e9i.n count ' rock C IcIte veinlets.
,./;....
raj hydrothermal alter-Striated Minn to greenish- ').4 Y...s Cataclastic. Medium grained rorA gray.
x -.; '2.
v -
a-7-,
2' core lost 112' to 11.1' core..---
Soft, some talc lest In soft 7.0710.
Minor rough slii.k -
folinted diorite to 103'. Fine-grained, Colleted with small quartz eyes below. Becomea very fine-grained.
114.9' FirA I
13 Fir enskles.
e dr -a IreenIsh tan 1?)Dinbase 01-Blenched
- 1-.V.
reenInh tan, aphanitie. May be Nol wx* HYdridia l mn -,-4--i--+-4"...j-
- well, tri7ygiqnitc Hairline foliation.
Slickensided-nily altered thrtmgh- '--'-',, Welded tit-mein Cutnclantle. Pine-minor p olish mt. Fairly hard.
4...- r t Welded breceln g r I
,4 Pa rt ings 7.i_;',
tend lo Intranet Rdi-,,, I nod, medium light Internal 011ie-I) IA 11 greilnInh gray. Dom) enmities pni.n111.1 311,,,
.4 nol resemble dinbase, a tn Inflation 1-* c Irreg. veining Ifellhq I...
1.
thronglesit.
Flused k LIghtEreenish Inn 11 I A V
2
'.,1:1:1'
-r_,----
v
,-,` Dlorlte-grenoditirite. ()tedium a
grained, light greenish gray.
MIA:Itch Nnt 'AN. ilVdrOthel*rn - 1. e -7,
- 7. locality foliated.
I' core lost ed. Lig -K.*
ally alt er ht Snmewhnt Bettened tan blench. Joints -.7.,, 7,, Granrsllorite. Light tennis',
by alteration and partings are not x -.s ii" gray (extensive bleaching),
slickensiticd. ')k v.-- foliated, medium grained.
x -
FM lorA 0
n)
N N[lee - S andard penetration resistance, blows/ft
- length recovered/length cored, CI RQD - Length of sound core 4 In. and longer/length cored, "1 S
- Split spoon sample Z. Groundwater
- Undisturbed samples -
s - Shelby tube N - Denison F - Fixed piston P - Pitcher 0- Osterberg G - GEI D - Drilling break k - Coefficient of w - Weathered, wenthering permeability NOTES
- 1) Angle hole 21 Washed through soil from 0-65.5' -
no sample taken.
- 3) Roller bitted 10 00,0 '
It No clayv present; therefore, no wnter nt e nen. dete conts rmin.
o 51 ThiS i ed s nnly a partial list f (lip and strike &dn.
SEABROOK STATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE.
YANKEE ATOMIC ELECTRIC COMPANY U intad embalms.*--- vc Date: February 13, 1974 Project 7288 PAGE 1 of 2 I LAG OF BORING SRP 7 4:1) GEOTECHNIGAI. ENGINEERS Irg,
BORING LOCATION See Scotland Road site plan INCLINATION 45 BEARING 844Eorlarr DATE START/FINISH Jan. 8, 1974 / Jan. 18, 1974 CASING ID 3 in.
CORE SIZE 1-7/31 in.
TOTAL DEPTH 255.0 ft DRILLED 11? American Drilling & Boring; T. Canning, GROUND EL ihISL) 17.5 ft DEHTH TO WATCH /DATE 0.11 ft / Jan. IS, 11171 LOGGED By Son - K. L. Polk ; Rork - J. It. Rand MSL ft SAMPLE HATE
(".
ADV.
minift
.".A.TJP: 13 or RQD CON 1 F.HT PRESSURE TES r STRIKE DIP E - Foliati n
.1 s Joint C., Contact B ' Bead Ing A
SOH. AND HOCK DESCRIPTIONS id z Ca :4' (Weathering, defects, me.)
(Type, texture, mineralogy, 8,
color, hartinenn, etc.n XI 7
Graphic get pal Computed puted
, k 10- cm/sec Depth ft Type mi d No, N
or Rec.
011111I(113 0 S Sligkenglde CONTINUED IRON PREVIOUS PAGE
- 100
-120
-140 460
- -.15
-747
.--IRO
- =.2 "*
1-
'...2 2
--21
'725
-;255 I-7 7
NQ-10 NQ-11 Q-20 Q-21 Q-22 NQ-23 Q-24 Q-27 Q-25 I Q-27 3 Q-28
- 0-29 I
i Q-30 I
Q-31 Q-32 I
Q-33 I
Q-34 I
Q-35
'Q-30 1 Q-37 i Q-39 Q-39 3 Q-18 92 100 100 100 97 100 100 1 00 100 100 100 100 100 100 100 100 100 100 100 100 100 100 BI 2.0 2.4 2.2 1,9
- 1. fn 2.0 2.1 1.7 1.9 1.7 1.8 1.9 1.7 1.9 2.3 2.1 2.1 2.5 2.8 2,3 2,0 2.0 2.5 35 48 32 45 28 51 55 72 25 40 97 90 52 55 53 90 54 05 50 43 40 18 A
rdi LI 90 BOTTOM F'
28 N530:, 24NW.1 ilK.;: 4'. 0, NtiOW, 42NE I' MC: gNE e NOSE, 17NW.8.7 Horizontal F-PRE: NM i N59E, 5201W S N52E, 7001W J-1:141E: RA' 0107W, RINE S-NH E, 4.1NW SI-N:113W, 33SW S-qr1, IMF, 1 7 II, 58I11*1 011110, tiONW.1 0130E, 1601W S:
N70E, IiINW.
N851-,, 11914W F N72E, 50NW S N52E, 4.114W.1 OF 11011ING V
7 11 27 i
2 11*
.',_'),.,-***
Broken contact. No visible attitud
..r s -W Cataelostic. Finegrained, Nol as. Minor -s -", Lens medium fused breccia.
gray Breccia-Int:led surface on effects . -* bleaehod Hairline velnlets. Medium
.A on partings. Part- *-*,. -, _ Epidote dark green (epirlotel begin-ings generally para-***sse.
ning 155' Driller ground llel lo foliationd as
. 7-.,..,"
Not. blenche above, Not slick- *-* '
ennobled.
Calaclastic. Fine-grained, 4.A. ', Offset veinlets
. di FURed locally foliated and breed-ated (fused). Medium-dark A r 7.
greenish gray. Epldetlzed.
Slight os N ol wo. Some mints! '---' -
Cataclastie. Eine-grained Not extensively ate an effects 1.
Tends ally nm-_ -
bleached, moder Joints. tn -_,--4 becoming prom intuit ly foliated, breceiated. Not alteration only pail palatial to foil- --, -
out leer oss-eutting vein-at inn. Nol slick-
--'* - Eased lets. Hard, breccia is lalsitina, C(1111110i(11(-- * --
1st -1 halal Drill breccia Bleed (annealed), Not fis y
o ',..-.-
,,,,,.,., well. D're..."-o throughout silo or slickonolded.
Medium greenish gray.
- '*% 1
- .6,1?
MO
=%.---
O,R Vale Not an. Minor bleaching CalacInstic. Vine-grained on alteration surface an eflects :-"**:,
Mints and part-a 4>
- matrix, opiclote banding.
Ingo. Not slicken- ;..44-;
Extensive fused breccin sided.
f.".'-',
fabric. Light yelloa-gree mylonite taphaniticl at 210.0-211.W. Fused a...,. mylonte i
Smooth.
throughout. Not slicken-th. Moderate lly non, minor striated Not an interna. "*'-'--
olded.
Joints
'''' :2211 roprA rffi
/FA E
I fir A
/Ma1i al rdri t
told partings 7
Sliekensided on Neabuty fault. Contact t olishecl. Some i...:A.1°.. Clint.-
no p
° N
72NE.1 -
- 7. 0 a on Need. Moderate wx at 213.2'
.oliekensides. Some s x
Pyrite stall Diorite. Slight alteration Smooth, soft slickensideo and a x v n.
and foliation to about 218'.
softened rock at,,,
an kintien*ate 222.4 '.
Medium grained, medium Smooth, chlorite w 11 Fresh and hard. 4..* ( }
Drillo act!. Joints x 7, Diorite. Medium grained, medium clerk to dark gray.
and partings show....,,
minor ourface on. K8,S*
Not altered hydrotherrnally.
Not slickensIded.
,....e q Irregularly calcite-reined g g throughout. Fused, X
i*
- a A
flemntite lireoh anti hard it, Diorite. Iinted medium-I; r: m oderat e ws Local zones of 4 Y.
. grained dark gray diorite i Minor allekonsided slight to moderato < a, K enclosing fine*-grained, on. Nol Molt-other-dark gray diorite inclusion
- Moderate ow Extensively irregularly al'in molly altered.
ved.
x,
9' left in hole
1:1Z Id C.)
N N
Hen -
- Standard penetration resistance, blows/ft Length recoveredliength cored, 'I RQD - Length of sound core 4 in. and longer/length cored, 7 S - Spilt spoon eample *Z Groundwater U - Undisturbed samples s - Shelby tube 14 - Denison
. F-Fixed piston P - Pitcher 0- Osterberg G - GE!
D - Drilling break in - Coefficient of wx - Weathered, weathering
- permeability NOr FS x - f dented core SEABROOK STATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY' U Med engineers
- COIVINCOTII nC Date: April 18, 1971 Project 7288 PACE 2 of 2 I LOG OF BORING Slt E 7 (t) GFYIRPZIINICAL ENGINEERS INC
BORING LOCATION See Scotland Rd. site plan INCLINATION Vertical BEARING DATE START/FINISH Jan. 25, 1974 / Feb. 19, 1974 CASING ID 3 In.
CORE SIZE 1-7/8 in.
TOTAL DEPTH 172.0 ft DRILLED BY American Drilling & Boring; T. Canning GROUND EL IMSL) 17.6 ft DEPTH TO WATER/DATE Tidal ft /
- LOGGED By Soil - K. L. Polk; Hock -.1. R. Rand EL.
MSL ft SAMPLE RATE OF ADV.
min/ft WATER o FIQD CONTENT PRESSURE TEST STRIKE, DIP F = Foliation j - joint C = Contact 13 = Bedding
,L; SOIL AND ROCK DESCRIPTIONS (Weathering, defects, etc.)
(Type, torture, mineralogy, color, hardneas, etc.)
TO Depth ft Type and No.
N or Rao Graphic KM pat Computed
, k 10-7cm/see II,"
.1 0
SSliakenstdo 17,6 0
-40
-60
- 80
-100
-120 ':.
-10
-.20 30 33.
. 0
- S9 li S10
- 811 24 29 14 7
4 2/18" 0
3 a
2 3) 29,4 27.4 33.8 40.4
- 41. 9 45.9 51.1 33.1 43,3 44.3 TOP Similar to Sample S1A, but very stiff. a 000> 1.0 taf 2)
Similar to Sample SI A, but very stiff. an itorT> 1.0 tsf u
Similar to Sample S4, but fewer brown spots; softer. su itor) = 0.54 tat Similar Gray silty clay. Soft; medium plasticity; slightly sticky; contains one brown spot 10 on in sloe. su itor) = 0.15 isf Similar to Sample 57, but contains some slightly darker and lighter colored layering.
%(tor) = 0.11 tat Similar to Sample S7, but contains some darker and lighter colored layers dipping-10 °
=0.18 tat U
Similar to Sample S7, but contains a silty fine sand layer; sticky (very disturbed).
Similar to Sample 07, but very Raft and sticky (very disturbed).
OF SAND 11
-.40 I1S13 III
--49.0 912 SI4 5
0 39 TOP Gray-brown slightly silty fine to medium sand. Uniform; fines are nonplastic.
Similar to Sample 012, but contains a clay layer and few gravel pieces up to 5 mm in Similar to Sample 812, but contains a cloy layer and a few gravel pieces up to 15 mm OF ROCK in sloe.
_ 5f 1
.-60
-.90
-90
-12
-13
-14]
-145
-101"14Q-12 1)
I NQ-1 INQ 2 NQ-3 I
I NQ 4
- 111K-5 I NQ-6 1 Q-7 1 NQ-8 NQ-9 I
NQ-10 I
.NQ 11 l NQ-1 I NQ-14 NQ-1 0 I
I NQ-I -
1 NQ-1 NQ-1' I NQ-1.
NQ-2 I 1
INQ-21 Q-2,
52 95 98 100 93 100 100 100 100 100 100 83 100 98 100 92 100 100 100 100 100 100
.41 15 1.3 1.4 1.4 1.5 1.0 1.0 1.0 1.1 1,2 1.2 1.2 I. 2 1.0 1.0 1.0 0.8 1.0 1.1 Li 1.0 0
25 83 74 82 95 86 63 82 87 31 75 li 03 80 23 53 5R 82 70 62 3
I----- *-
Slight wx Generally not wx inter- -,-
Cataclastic. Fine-grained, nally. Breaks on fall-,.--, -
bleached to light tan-green
= Slight wx
-!..-7 --
on partings ation with slight powdery gray.
arc effects on partings
.. A -
D rlflore r
A P
IP 3)
N78W, 57NE F N88E, 50NW F j NOSE, 3514W J surfaces. Medium Slight wx
. ----e greenish-gray hydro- :.
- -t-r -.?vo thermal alteration.
a-1 fl iz -1:-.
- -*.* Highly deformed Slight wx
, 4 -..
1,-; tt 7_4 4
- welded breccia Not wx. Minor wx et-D feels on some partings 7:,.: Welded breccia as well as some striatedi.fiL_77throughout but not polished surfaces - ' - Less bleached 7-80 N36W, 40NE F I
,......e,.
- =-=,
Fused contact, deformed cks 60° Id
- 1449W, J
27NE i't°44`..- 00. ° atac antic. Me.lum.a N10E, 25SE S 9
--7greenish gray. Deformed veins.
a I
1479W, 5411E.J il 1
Foliation 1436W, 2914E J u
Z Not s. Drills well.
Light green-gray hydro-thermal alteration.
N67W, 7514E J Soft, powdery zone at N5OW, 27NE S Soft-striated 98 ft probably vwx associ Powdery surface ated with Joint. Local 1435W, 36NE J N87E, 64NW 8 Chips striated joints or a.,,,-- -a-
-_-_, -7 4 -..- Z: Fused breeds
. Epidote Cataelastio. Fine-f°,.1 grained, medium green
',Z.:, :
lab gray. Foliated.
-7** *-,"
Local fused breeds
' - Diorite rifh VIA i
IIi 100 partings usually parts N 7E 35SE J r.I-,.-);
zones.
on foliation.
17:' :......-
Cataelastio, Floe-NW 4279R1 T N54W: 471411 F Not wx. Joints show 4,,,, -.0
>r-o'r grained, medium green-minor slippery chlorite-Joh gray. Zones of talc coatings. Not pol-tr",'
welded breccia, hair-NR2E, 37NW J imbed. Subject to hydro-
- Welded line epidote stringers.
ME: R (411 t*
thermal alteration,
--I-- 1-.4.
....- breeds MR: iffiF i epidotization. n". A Welded breccia A.14 'A throughout Chips Not wx. Minor surface,...1; Cataclastic. Fine-wx effects on partings. f...44-Partings also show 7.--- ;:...--;
grained, medium light A Z "A 4 greenish-gray. Local some striated, not psi-
_ Light tan welded brecelas. FaIrl A w
!shed surfaces..Z.7.-
well foliated.
...* A
..!...AA-t-Not wx. Medium-gray._!........
- -.7.. '
green bleaching due to _
Cataelastio. Fine-Minor rusty hydrothermal alteration. e-,: ;.7-, - Medium grained, fused breccia a
Minor surface wx ef-t =,;.....r grained throughout. Medium
' z4 '
(sets on partings. Some Chlorite Partings striated.
greenish-gray.
Sr A rid re wr I
D a
N
- Standard penetration resistance, blows/ft flee - Length recovered/length cored, %
RQD - Length of sound core 4 in. and longer/length cored, %
s
- Spilt spoon /ample
- , Groundwater t]
- Undisturbed sample.
S - Shelby tube N - Denison F-Fixed piston P - Pitcher 0- Osterberg 0 - GEI 13
- Drilling break k - Coefficient of wx - Weathered, weathering permeability NOTES
- 1)
Roller bitted to 53 ft,
- 2) a (tor) Sheer strength measured U
with Torvane
- 3) This is only a partial list of dip and atrike data.
x - Oriented core S EABROOK STATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY a mod engkiesra oemermenn.o Date: March 9, 1974 Project 7286 PAGE. 1 of 2 I LOG OF BORING SRF 8 (t) OICTINCHNICAL UNOIN1111148 INC.
BORING LOCATION See Scotland Rd. site plan INCLINATION Vertical BEARING DATE START/FINISH Jan. 25, 1974
/ Feb. 19, 1974 CASING ID 3 in.
CORE SIZE 1-7/8 in.
TOTAL DEPTH 172.0 ft DRILLED BY American Drilling di BoringIL Canning GROUND EL (MSL) 1 7. 5 ft DEPTH TO WATER/DATE Tidal ft /
LOGGED By Soli - K. L. Polk; Rock - J. R. Rand EL.
MSL ft SAMPLE RATE OF ADV.
min/ft WATER or RQD CONTENT PRESSURE TEST STRIKE, DIP F.., Foliation j. Joint C ). Contact B.. Bedding
).; P 5011, AND ROCK DESCRIPTIONS 0 Z (Weathering, defecte, etc. )
(Type, texture, mineralogy,
.9 ki color, hardness, etc.)
Depth
_ ft Type and No.
N or Rec.
Graphic S:IM.
pa I Computed k
10 -4 cm/sec
( 11).11)))00 S - Sliokens ide CONTINUED FROM PREVIOUS PAGE
-140 1145
- 15
- 16 1 7 XNQ-23 5NQ-24 x NQ-25 xNQ-26 x NQ-2 7 xNQ-213 100 100 100 98 98 100 1.1 1.2
- 1. 2 1.2 1,5 1.2 57 78 77 47 57 71 V
I N72E, 68NW JF N85W, 819W S N85W, 20NE S N86W, SONS F N82E, 28NW J N59W, 405W j N85E, 56NW F N34W, 19NE J N75E, 51NW F NOM, 56NE F N21W, 34SW S N27E, 70NW F NOSE. 46NW F
- E Not poliehed.
.6. f Intenably deformed, re-
- A......:
welded. Not out by cross-A ' A..
cutting veinlets. No e P.
observable calcite.
Not wx. hydrntherm-Cataclast lc. Fine-grained ally altered 10 103.6'. A A
. A 160, 2, to fused breccia, hairline Fresh, essentially un-..-7.-..-- epidote. Medium greenish Chips 160 4'
-=--
gray-tan at 159-160.6 altered below partinga 7.-
ft Chips generally parallel
,,,_ - Mylonite
...:.276 Fault zone-transitional-not slick.
Not slIckensided foliation. A few stri-,.x.....5 ated surfacea, not v e) s r.1 Diorite. Slight alteration and foliated to about 168ft Smooth joint pol polished, a k) e Medium-fine grained,
)4, a a r,
medium gray.
Ti"
-172 7_:
- ,r 7.-
7 BOTTOM OF BORING
-r 2
ge 13 N
N - Standard penetration resistance, blows/ft Ben - Length recovered/length cored, %
RQD - Length of sound core 4 in. and longer/length cored, %
s
- Split spoon sample g-Groundwater U
- Undisturbed sample' S - Shelby tube N - Denison F - need piston P - Pitcher 0- Osterberg G - GE!
D - Drilling brash is - Coefficient of wx - Weathered, weathering permeability NOTES SEABROOK STATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY UMW 0110106#13*0666eneee,6.
Date) March 9, 1974 Project 7280 PAGE 2 of 2 I LOG OF BORING -SRF 8 0110TECHNICAL RNOINO2d101 INC.
BORING LOCATION See Scotland Rd. site plan INCLINATION Vertical BEARING DATE START/FINISH Dec. 20, 1973
/ Jan. 3. 1974 CASING ID 3 in.
CORE SIZE 1-7/8 in.
TOTAL DEPTH 118.3 ft DRILLED BY American Drilling & Raring; T.Canning,T. Paquette GROUND EL IMSL) 17,8 ft DEPTH TO WATER/DATE 0.2 ft / Dec. 20, 1973 LOGGED BY Soil - K. I,. Polk; Rock J. R. Rand EL MT-ft SAMPLE RATE OF ADV.
min/ft WATER or RQD CONTENT PRESSURE TEST STRIKE, DIP F. Foliation J. Joint C = Contact B = Bedding a; Q SOIL AND ROCK DESCRIPTIONS w <4 (Weathering, defects, etc.)
(Type, texture, mtneralogy, 0,.2 color, hardness, etc.)
° ag Depth ft Type and Na.
N or Rec.
Graphic HSIS psi Computed k
10-4 cm/sec 17 8 I ft, ',TT.0 = Slickensid 0:
-20
-40
-60
-80
-100
.40
- -20,y*
,-_30 1 1
- 31°
-4° 1
-50 1
55..
11S5 ISIS
,S1 1 S2 1 S3 IIS4 OS6 MO SR S9 S 1 S12 0
3 0
27.4 28.2 32.0
- 37. 9
- 40. 3 40.0 458 41.9 44.1 29.5
- 29. 6 TOP OF SAND Dark brown clayey topsoil; some small roofs; organic odor. KA-Mottled ray brown and rusty-brova silty clay. Low plasticity. s (tor), 1,0 tef.6S2-Similar to Sample SA, with blocky structure. a (tor) >1.0 tat. 93-toe-brown silty clay'. Low to medium glashilty; y above PL; illbnst13.11;eomewhat locky etructure. s(tort) > 1.0 tot. S4-
"4(lor°) - 00, ATP.
l Seta' 4" ( tg720liv' c
e-g f
gwraZ i
1:r to Sniy clay. buacit la 4°I°a4s
- anInsticky; aontains a few silt layers 0.5 mm thit a
et' a(tor) = 03:36-0.42 MCP.
plasticity; 07-Similar to Sample 56, but slightly sticky. s 0 (tor) = H.32 MI.
Gray silty clay. Soft; medium to high plasticity; sticky. au ger) - 0.15 tot Shriller to Sample SH, but has a blocky structure; appears disturbed. s (tor) = 0.23 tot U
Similar to Sample SR, but has a blooky structure; appears very disturbed, s (tor)=0.10ts U
Similar to Sample 58, but medium stiff; blocky structure; appears very disturbed.
su (tor) = 0.43 tot Similar to Sample S8, hut has a blocky structure; contains layers of silty fine sand up 1S14 SI3 515 11 0
24 90 100 100 100 97 100 100 96 98 100 64 too 100 100 1111111*=111111111=1 1.0 1,2 1.2 1.2 1.5 1.9 2.0 2.0 2.0
.9 1.8
- 2. 0 2.0 33 26 7
43 28 53 65 98 100 7
48 83 62 MIN111 TOP or BOTTOM to 20 Trim thick.
Gray fMe sand. Uniform; clean; very fast reaction to shaking test.
Similar to Sample 013, hut also contains a layer of coarse sand.
Light gray fine to coarse sand. Widely graded; very slightly silty; subangular grams; contains a few gravel places epic 15 mm In size.
-5,0
-60 770 Z..80
--90
-11 III
- Do
-10 'INQ-10 NQ-1 I NQ-2 I NQ-3 NQ-4 I
I NQ-5
-6 1
, NQ-7
- NQ-8 I NQ-9 I NQ-11 I NQ-12 NQ-13 I NQ-14
..V---
Not wit internally, kills -.., A': Welded Cataclastie. Generally
. bleached by hydrothermal4;15,,4 breads fine-grained, medium alteration. Minor sac of-throughout throughout greenish gray (epldotized I 0- Chips E
fects an partings. Parts Predominantly welded on foliation. No pollehe *re i.
breccia throughout a° slickensides. Some part-,
rth quartz vainlets x-cut P*;.* Chips Inge striated. Moderate r *'* 7 foliation.
4 A.2
- 72.5' Ground chips we 72.5' to 74.5'. et 4.'7'
- 4
- 74. 5' Chlorite
.7.,..t., 7s,
.A. AA, FirA r A 7*
A raj OF A l
Tan Light yellow-green al-Chips Not ax internal. Joints °- -,,,,,
I `
- mylonite location BO' to 91.7'.
end partings are not V- -
Chips-polished. Some striated *
- slight ax surfaces.
..,.. y-OF BORING Diorite. Medium-
- V-* ),
grained, medium gray.
Chlorite-ht"v it '
Unaltered rock - feldspa
,:s.,..v.).,'
striated vetnlets. Foliated to
- i. Y. "..4 about 89' depth.
Fresh and hard. Drills X 'Y Y 4
14 NI well. Joints and partings k y,
D not slickensided. Not lx,.,.
Diorite - amphibolite.
Driller Medium-grained, dark affected by hydrothermal tr, y A
- m Islatch gray, irregular folds-alteration or mechanical ?,,.s,
pathic veinlets.
deformation.
A X 7t X
- it Slight wx Fresh and hard. Not
.,,,.), yl deformed or altered by,, y y, ph*
Diorite - amphibolite.
Medium-grained, dark faulting effects.
(71 gray, not foliated.
ii.,..:.-..: 5.
quartzite
'Y.,
%`4 Y )k Y rid
- r. A FL 1
ropA re N
N - Standard penetration resistance, bloweat Ben - Length reoovered/length cored, %
ROD - Length of sound core 4 In. and longer/length cored, %
S - Split epoon sample
- Groundwater U - Undisturbed samples 8 - Shelby tube N - Denison F-Fixed piston P - Pitcher 0- Da terberg G - GEI D - Drilling break
- k - Coefficient of wx - Weathered, weathering permeability NOTES
- 1) sitor) = Shear strength measured u
with Torvane.
° 1 -102.4, IA -30.0 x - Oriented core SEA BROOK STATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY U mitad angtneets *,,,,,,,,,,,...,,,,<<
Date; May 8, 1974 Project 7286 PAGE 1 of 1 I LOG OF BORING SRF 9 OSOTECHNIGAL ENGINEERS INC.
ATTACHMENT No. 3 PETROLOGY AND PRELIMINARY INTERPRETATION OF EIGHT SAMPLES OF DRILL CORE FROM THE SCOTLANT ROAD FAULT NEWBURY, MASSACHUSETTS GENE SIMMONS DOROTHY RICHTER MASSACHUSETTS INSTITUTE OF TECHNOLOGY CAMBRIDGE, MASSACHUSETTS 02134 for WESTON GEOPHYSICAL RESEARCH, INC.
WESTBORO, MASSACHUSETTS 01581
PETROGRAPHY AND PRELIMINARY INTERPRETATION OF EIGHT SAMPLES OF DRILL CORE FROM THE SCOTLAND ROAD FAULT, NEWBURYPORT, MASSACHUSETTS Weston Geophysical Research,
- Inc.
Post Office Box 306 Weston, Massachusetts 02193 Gene Simmons Dorothy Richter 15 June 1974
SUMMARY
The petrography of eight samples of drill core from the vicinity of the Scotland Road fault, Newburyport, Massachusetts is described in this report. The samples (with the important ex-ception of sample SRF-5B) all show evidence of dynamic deformation; That is, cataclasis, brecciation, and intense crushing--all probably due to motion along the fault. The deformation clearly took place after the regional metamorphism of the rocks (which was probably associated with the Devonian Acadian orogeny).
The microcracks produced in the deformational events appear in thin section to have either annealed, or have been filled by secondary minerals. There is no firm petrographic evidence of recent deformation of these samples.
Sample SRF-5B may be a very important clue to the history of movement on the Scotland Road Fault. It is an altered olivine basalt that seems to be completely free of deformation. If the thin section is representative of a significant volume of this rock, then it may show that no deformation has occurred on the Scotland Road Fault since this rock last cooled below about 500°C.
An even stronger statement can be made with respect to movement on the fault after the alteration of the rock was completed:
Because the strength of diabase decreases with alteration and because of the absence of deformational features in Sample SRF-5B, we are quite sure that no movement occurred on the fault after the alteration was completed.
Table 1 is a summary of the rock types in the Scotland Road fault suite. Detailed petrographic descriptions and photomicrographs of textural features are given on the following pages.
Table 1. Summary of Sam les Sample #
Rock Type SRF-1A Amphibolite breccia SRF-2A Mylonized quartz-musco-vite schist SRF-2B Brecciated quartz-mus-covite schist SRF-3A 67' Muscovite mylonite SRF-4A 43' Chlorite augen gneiss SRF-5A 42' Sheared granodiorite SRF-5B 175' Altered olivine basalt SRF-7A 116' Ultramylonite SRF-8A 155° Brecciated quartz-muscovite schist SRF-8B 146.5' Brecciated quartz-muscovite schist SRF-9A 80' Brecciated quartz-muscovite schist PETROGRAPHY OF SAMPLE SRF-1A Name: Amphibolite breccia Macroscopic Description This sample is a coarse-grained dark green breccia.
Large (to 1.5cm) angular fragments of dark green amphi-bole appear set in a finer matrix of crushed amphibole and finer-grained white minerals. Zones of continuous mylonized and sheared materials cut across the sample.
Microscopic Description Texture The texture of the thin section is very complex.
Large single crystals can be seen to be split, sheared, rotated, and crushed. The original foliation of the schist is totally disrupted and the crystals are now randomly oriented. Multiple sets of fine parallel cracks and/or inclusion trains can be traced from an amphibole crystal into an adjacent feldspar grain. Coherent fragments of crystals can be "fitted" back together by eye, but they are separated by fibrous chlorite. Large cystals have cataclastic material along grain edges. Calcite viens which crosscut the breccia are themselves deformed, and crosscut by thin veins of undeformed plagioclase.
Mineralogy Hornblende is the dominant constituent of the rock. It is optically negative with a large axial angle, and pleochroic from pale green to dark greenish brown.
Crystal fragments range in size from 0.01mni-1.5cm.
The crystals contain abundant inclusion trains and cataclastic material occurs within crystals and bevels grain boundaries. The hornblende appears to be unaltered except for a few overgrowths of blue-green amphibole.
Plagioclase is the second most abundant mineral in the rock. It occurs as untwinned crystals which were probably a part of the original amphibolite schist.
Plagioclase formslarge (0.5 - 1.0mm) crystals which are completely covered with linear sets of dusty in-clusions. Most crystals appear strained and broken; healed fractures are marked by strings of quartz, calcite, and fresh plagioclase.
chlorite forms pale green, fibrous, slightly pleochroic aggregates. All crystals display a consistent anoma-lous "tiger eye" brown interference color. Some of the chlorite seems to be post-brecciation recrystallized mylonitic material which appears to be stretched be-tween cystals. A lesser amount of chlorite appears to be retrograded biotite which is recognized by small amounts of relict biotite and remnant pleochroic haloes.
Calcite appears in veins and fills interstices in the matrix of the rock. Most of the calcite in the veins is highly distorted and elongated; but there are also minor amounts of undistorted calcite in thin younger veins.
Sphene occurs in accessory amounts as small nodular crys-tals associated with fuzzy aggregates of leucoxene.
Opaque minerals form stringy aggregates in the mica flakes and more rarely occur as roundish single crystals in the matrix of the rock.
Apatite and Cordierite occur as small euhedral crystals in the matrix of the sample.
Estimated modal composition amphibole 45%
plagioclase 30%
calcite 15%
opaque 5%
accessories 5%
PETROGRAPHY OF SAMPLE SRF-2A Name: Mylonized quartz muscovite schist Macroscopic Description Sample SRF-2A is a light greenish-grey rock. It appears in hand specimen to be a brecciated cataclasite; in other words, it has a very complex texture which may be the re-sult of multiple deformations. The sample can be separated into different domains of fragments of coarser and finer grained material. The fragments are separated by fine-grained, lighter colored material.
Microscopic Description Texture The domains mentioned above appear in thin section as very fine mosaics of granular quartz grains and scaly muscovite. The average grain size is about 0.0mm.
The coherent fragments are separated by shear zones of chlorite, calcite, sphene and ultrafine material which is unresolvable with high magnification.
Mineralogy Quartz is abundant in the rock fragments and occurs as small (0.2mm) roundish grains. Many grains appear to be crushed and granulated. Most grains have undulose extinction. The quartz crystals are almost always separated from each other by a film of minute mica flakes, except in the coarser grained fragments where they are in direct contact along sutured grain boundaries.
Muscovite occurs as small scaly clusters of crystals.
Muscovite is a major constituent of the rock and has three modes of occurrence -- 1) as minute aggregates completely replacing what was probably feldspar, 2) as thin films around individual quartz crystals, and
- 3) as part of the shear zones between the rock frag-ments.
Calcite forms small aggregates in the shear zones and small veins which cut the rock.
Chlorite occurs in the shear zones between the fragments as irregular stringers.
Estimated modal composition quartz 40%
muscovite 35%
calcite 15%
chlorite 5%
unresolvable material 5%
PETROGRAPHY OF SAMPLE SRF-2B Name: Brecciated quartz-muscovite schist Macroscopic Description This sample is a medium greyish green brecciated rock which is very similar to sample SRF-2A in hand specimen.
It is slightly coarser grained than the latter sample but is has a similar texture of sheared and brecciated metamorphic rock fragments up to 2cm in size.
Microscopic Description Texture The thin section shows a complex texture of brecciated quartz-muscovite rock. The fragments are of various sizes but have an internal uniform grain size of 0.1mm or less. The fragments are separated by zones of un-resolvably fine minerals mixed with calcite.
Mineralogy Quartz is one of the most abundant minerals in this rock.
It occurs as irregular but generally ovoid grains which appear to be highly strained and are 0.1mm in size. Most of the quartz grains are not in contact with other quartz grains, and contain relatively few inclusions and bubble trains.
Muscovite forms small scaly masses which thinly separate quartz grains. The muscovite contains many small in-clusions of opaques. Muscovite is a common mineral in the shear zones where it has a weblike pattern.
Chlorite is not very abundant in the main body of the rock but it is quite common in the sheared zones be-tween the rock fragments. It is generally very pale green, only slightly pleochroic, and very weakly bi-refringent.
Biotite occurs as a few relict grains associated with some of the chlorite.
Calcite, clouded with fluid inclusions, fills the shear zones and younger veins. It is also present in the matrix of the fragments as small subhedral crystals.
Opaque grains are widely dispersed throughout the thin sections as minute single crystals and aggregates.
Garnet crystals are present in the sample but are very rare.
Crystals <0.1mm in size appear brownish at the core because of tiny opaque inclusions.
Estimated Modal Composition quartz 35%
muscovite 40%
calcite 15%
chlorite 5%
opaques &
accessories 5%
PETROGRAPHY OF SAMPLE SRF-3A 67' Name: Muscovite Mylonite Macroscopic Description This sample is a massive rock, mottled light and dark grey, and almost gneissic in texture. Most grains are too fine-grained to be recognized although enough larger quartz grains are visible to give the sample its banded appearance.
Microscopic Description Texture The sample is very fine-grained (--0.01mm) and vaguely schistose in thin section. Very faint outlines of lenticular shapes seem to mark former brecciated fragments. These fragments are obscured by a fine network of stringy mica which have a preferred orientation in another direction.
The complex texture of this sample suggests multiple periods of deformation.
Mineralogy Muscovite is abundant in this sample as ultrafine crystals which are often optically aligned to give a weblike appearance of the mineral. Muscovite is very finely mixed with quartz in the matrix of the rock. It is the major mineral in the sample, although one cannot see it in hand specimen.
Quartz occurs as isolated fragmental crystals in the sample. It generally has indistinct grain boundaries.
Quartz also appears to be mixed with the muscovite at a very fine scale.
Calcite occurs commonly as 0.5mm roundish crystals in the matrix and as thin aggregates following the schis-tosity.
Opaque grains occur in small knots with streamlined out-lines, and small crystals following schistosity.
Estimated Modal Composition muscovite 70%
quartz 15%
calcite 10%
opaques 5%
Note: Another thin section from this core exhibits similar textures but contains small domains which are calcite rich.
PETROGRAPHY OF SAMPLE SRF-4A 43' Name: Chlorite augen gneiss Macroscopic Description This sample is a fine-grained augen gneiss. It has a dark green matrix of indistinguishable minerals and 0.5mm "eyes" of white crystals. The sample shows strong directional foliation which is crosscut by younger veins of light colored minerals.
Microscopic Description Texture In thin section, the sample shows a complex, almost chaotic texture. It is basically a mosaic of fragmental quartz and feldspar crystals and aggregates with lenticular shapes sandwiched by shear zones of chlorite, calcite, and opaques. Thin veins of calcite cut the foliation.
Mineralogy Chlorite is the most abundant mineral in the rock.
It is pale green, pleochroic, and exhibits anomalous brown interference colors. Very fine, scaly aggregates of chlorite are commonly finely mixed with quartz and opaque grains. Larger crystals of chlorite show small amounts of relict biotite.
Plagioclase occurs as intensely sericitized, poorly twinned, fragmented crystals in the augen.
Quartz has three modes of occurrence in this sample: 1) large broken crystals in the augen, 2) very finely mixed in the matrix, and 3) fresh crystals in thin veinlets.
Calcite is a very common mineral in the matrix, shear zones, and in veins. It commonly has deformed twin planes.
Orthoclase occurs in accessory amounts as anomalously fresh appearing fragmental crystals in the augen.
Opaque grains are widely dispersed throughout the thin section as minute crystals.
Estimated Modal Composition chlorite 35%
plagioclase 20%
quartz 15%
calcite 20%
orthoclase 5%
opaque 5%
Note -- the bulk mineral composition of this sample suggests that its protolith was a mafic igneous rock.
PETROGRAPHY OF SAMPLE SRF-5A 42' Name: Sheared granodiorite Macroscopic Description This sample appears in hand specimen to be a massive, coarse-grained igneous rock with no evidence of defor-mation. The average grain size is approximately lmm.
Visible in hand specimen are pink feldspar, white quartz, and an unknown green mineral.
Microscopic Description Texture The thin section has the hypidiomorphic granular texture typical of plutonic rocks. Equidimensional crystals showing varying degrees of alteration are crosscut by thin veinlets. The major deformational features in the thin section are: healed cracks, undulose extinction of the minerals, and a narrow shear zone.
Mineralogy "Plagioclase", once a major component of this sample, has been completely kaolinized with only a few rare traces of the original twinning or textures left. The kao-inization reaction produces excess Si0 2 which can be seen in the thin section as a thin rim around each kao-linized grain. These peculiar rims are optically uni-form around each crystal. The rims only occur along feldspar-feldspar contacts but do not occur along feld-spar-quartz contacts.
Quartz occurs as 1 mm blocky crystals with undulose extinction and numerous inclusion trains. Quartz-feldspar boundaries are generally smooth whereas quartz-quartz boundaries are sutured, a sign of par-tial recrystallization. Quartz also occurs in the rims around kaolinized feldspar grains as mentioned above.
Microcline occurs as slightly altered crystals with a microperthitic texture.
Chlorite forms pseudomorphs after biotite and amphibole.
It is medium green, weakly pleochroic, and contains abundant needles of opaques.
Calcite occurs as small clusters of crystals finely mixed with kaolinite alteration products, as thin veinlets, and as aggregates in the matrix. Calcite also fills the one shear zone in the thin section.
Accessory minerals in this rock are opaques, apatite, and sphene.
Estimated Modal Composition "plagioclase" 40%
microcline 20%
quartz 25%
chlorite 12%
opaque &
accessories 3%
PETROGRAPHY OF SAMPLE SRF-5B 175' Name: Altered olivine basalt Macroscopic Description This is a massive, dark greenish grey aphanitic rock.
Small dark phenocrysts (0.5 - 1.0mm) and 0.5mm white amygdules are visible in the black groundmass. There are no signs of deformation such as shear zones or even veins.
Microscopic Description Texture The sample has a very fine-grained (<0.1mm) intersertal texture. The matrix texture is somewhat obscured by partial alteration of the minerals. The vesicles are rimmed with fibrous minerals. The phenocrysts are com-pletely replaced by alteration minerals.
Mineralogy Plagioclase occurs as small (0.1mm or less) laths in the matrix of the rock. It does not form any phenocrysts.
The plagioclase is generally poorly twinned and par-tially altered to a sericitic product.
Pyroxene crystals occur as small roundish grains with small scale intergrowths with opaque rods. It is pinkish brown in color and is probably augite.
Serpentine completely replaces roundish 1.0mm phenocrysts of olivine. Serpentine also occurs as fibers in the matrix of the rock, and as the lining of the amygdules.
Calcite forms twinned single crystals in the amygdules and is otherwise rare in the matrix.
Estimated Modal Composition plagioclase 35%
pyroxene 35%
serpentine 10%
calcite 10%
sericitic alteration 10%
Note -- This sample is probably from a dike which post-dates movement along the Scotland Road fault since it is completely undeformed.
PETROGRAPHY OF SAMPLE SRF-7A 116' Name: Ultramylonite Macroscopic Description This is a compact, extremely fine-grained, mustard colored rock. A few small whitish augen (0.5 - 1.0mm) are visi-ble in the hand specimen. The matrix is buff colored, highly sheared looking material.
Microscopic Description Texture This is an ultrafine-grained crush breccia. The original texture of the rock is totally obliterated. The apparent mineral layering is due to 'smearing' of the grain in local shear zones.
Mineralogy The rock is so fine-grained that individual crystals are difficult to discriminate, except in the few augen of quartz, calcite, and opaque minerals. The matrix is ex-tremely finely-ground quartz, mica, calcite, sphene, apa-tite, and opaque minerals. Calcite occurs in small nod-ules which show some signs of recrystallization.
Note -- the fine-grained nature of this rock precludes any further discussion of its mineralogy or texture.
PETROGRAPHY OF SAMPLE SRF-8A 155' Names Brecciated quartz-muscovite schist Macroscopic Description This sample is a dark greenish grey rock. On a fresh surface it appears to be a fine grained quartzite cut by narrow black shear zones and mottled tan zones. The wet sawed surface shows the texture of a breccia with distinct fragments ranging in size from lmm to lcm. The fragments are separated by the tan materials both are cut bythe black shear zone.
Microscopic Description Texture The texture in thin section is similar to other samples in the suite. Lenticular fragments of various sizes of quartz muscovite rock are separated by ultrafine-grained shear zones. Average grain size is 0.1mm. The relative proportions of quartz and muscovite varies from fragment to fragment.
Mineralogy Quartz occurs as roundish grains which are almost always isolated from each other by varying amounts of musco-vite. Some of the crystals appear to be broken.
Muscovite forms scaly masses which are vaguely schistose.
Muscovite is a major component of the rock, filling interstices, between quartz grains, shear zones. It forms the bulk of several lithic fragments.
Chlorite is a major constituent of the sheared zones between lithic fragments although it is not abundant in the fragments themselves. It is pale green, slightly pleochoic, and exhibits anomalous blue interference colors.
Opaque grains, finely mixed with leucoxene, form intricate integrowths pseudomorphous after tabular biotite plates and occur as euhedral crystals in the lithic fragments.
Calcite is common in the shear zones as elongate crystals.
It also occurs as minute single crystals in the lithic fragments, and in a few thin, undeformed veins.
Sphene forms fine granular aggregates in the matrix of the fragments and occurs as stringers in the shear zones.
Estimated modal composition Quartz 45%
Muscovite 30%
Chlorite 10%
Opaque Calcite 5%
Sphene 5%
PETROGRAPHY OF SAMPLE SRF-8B 146.5 Name; Brecciated quartz-muscovite schist Macroscopic Description This sample is strikingly similar to SRF-8A in hand specimen. It is dark greenish-grey in color. On a fresh broken surface, it appears fine grained and structureless.
On the sawed surface, one can see lenticular fragments of various sizes, thinly outlined by lighter colored material.
The core is broken along a major fracture surface.
Microscopic Description Texture The texture of the sample is variable and complex.
The rock fragments consist of roundish quartz grains and scaly mica; the grain size and composition of the fragments vary. The lithic fragments are separated by mylonite which consists of ground quartz, mica, chlorite, and calcite.
Mineralogy Quartz is the most abundant and most coarsely grained mineral in the rock. It occurs as roundish grains which vary in size (0.1-0.3mm) and abundance (60%-40%) in the different lithic fragments. The crystals commonly con-tain inclusions. Quartz crystals are rare in contact with each other. A minor amount of quartz occurs in thin veins which cut the rock and probably post-date the brecciation.
Muscovite occurs as scaly aggregates whose crystals are much less than 0.1mm in size. The aggregates form most of the matrix of the lithic fragments. Submicro-scopic muscovite appears to occur in the mylonized zones.
Chlorite forms pale green 0.1mm crystals in the sh?ar zones.
Chlorite less commonly occurs in the matrix of the lithic fragments.
Opaque grains oCcur in the shear zones, in the matrix and in a few rare veins.
Carbonate forms irregular clusters of crystals in the shear zones but does not occur in the lithic fragments.
Sphene occurs in minor amounts as grainy aggregates in the matrix of fragments and in the mylonized zones.
Estimated modal composition Quartz 40%
Muscovite 4,
Chlorite 10%
Calcite 5%
Opaques 5%
PETROGRAPHY OF SAMPLE SRF-9A 80' Name: Brecciated uartz-muscovite schist Macroscopic Description mhe texture of this sample is similar to that of samples 8A and 8B, although the rock is light tannish-grey in color.
Lenticular and irregularly shaped fragments 0.1-1cm in size are recognizable in a highly sheared matrix. Indi-vidual minerals are too fine-grained to recognize in hand specimen. Thin veins of light-colored minerals and, more rarely, opaques are present.
Microscopic Description Texture The thin section exhibits the chaotic texture of the rock. Lenticular quartz-muscovite lithic fragments are elongate parallel to foliation. Mylonized zones appear to be structureless. Irregular semi-parallel veinlett cut the foliation.
Mineralogy Quartz occurs as roundish grains in the lithic fragments The grains appear to be highly strained and in places broken. They commonly contain linear arrays of in-clusions. Very finely ground quartz is apparently a constituent in the mylonite zones. Several thin veins of quartz cut the rock. The margins of the veins are comMonly sutured and show signs of recrystalliza-tion; in some places the vein quartz is optically continuous with quartz 0 -rains which it cuts.
Muscovite forms scaly masses between quartz grains in the lithic fragments. The individual crystals are minute but seem to show a general preferred orientation parallel to the foliation. Muscovite appears to be relatively more abundant in the finer-grained lithic fragments than in the coarser-grained fragments.
Calcite is prominant in the mylonized zones and in a few veins. It occurs less commonly in the matrix of the rock fragments.
Sphene aggregates are also common in the shear zones but sparsely distributed in the rest of the rock.
Opaques seem to be concentrated in the shear zones between lithic fragments in clusters of 0.1mm crystals. They also occur in a few veins and as euhedral crystals in the fragments.
Es't.,L.1J2C1Da j,COTnOSitj_Or1 11atedIT Quartz 35%
Muscovite 30%
Calcite 20%
Sphene 5%
Opaques 10%
Notes The light color of this sample is apparently due to the virtual absence of chlorite in the shear-zones coupled with the relative abundance of calcite.
Photo 1. Sample SRF-1A.
Amphibolite breccia. Plane polarized light. Width of field 1.5mm. This photo-micrograph shows a typical field of view of this sample.
Note that the large dark-ish hornblende crystals are sheared. The lighter grey crystals are plagio-clase. See also Photo 2.
Photo 2. Sample SRF-1A. Amphi-bolite breccia. Crossed polarized light. Width of field 1.5mm.
This photomicrograph shows a major shear zone in the rock.
The elongate crystals are de-formed calcite. See also Photo 1.
Photo 3, Sample SRF-2A.
Mylonized quartz-muscovite schist. Cross polarized light. Width of field 1.5mm.
This photomicrograph shows one large lithic fragment covering 3/4 of the photo-graph and consisting of roundish quartz grains and fuzzy muscovite. The dark zones around the fragment are shear zones of chlorite and other unresolvable min-erals. See Photo 4 for an enlargement of the lithic fragment.
Photo 4. Sample SRF-2A. My-ionized quartz-muscovite schist.
Plane polarized light. Width of field 005mm. This photo is an enlargement of the large lithic fragment shown in Photo 3. The roundish grains are quartz, and the matrix is scaly muscovite, opaques, sphene, and tiny euhedral crystals of calcite as in the left center of the photo.
Photo 5. Sample SRF-2B.
Brecciated quartz-muscovite schist. Plane polarized light. Width of field 1.5mm.
This photomicrograph shows the chaotic texture typical of this rock. Note the len-ticular fragments of vary-ing grain sizes. The round white crystals are quartz; the darker minerals are scaly muscovite, sphene, calcite and opaques. See also Photo 6, an enlargement of a part of this field magnified. Note the similar-ity of this sample with SRF-2A.
Photo 6. An enlargement of a portion of Photo 5. Sample SRF-2B. Brecciated quartz-mus-covite schist. Plane polarized light. Width of field 0.5mm.
This photomicrograph shows the chaotic texture typical of this rock. The round white crystals are quartz; the darker minerals are scaly muscovite, sphene, cal-cite and opaques. Note the similarity of this sample with SRF-2A.
Photo 7. Sample SRF-3A 67'.
Muscovite mylonite. Crossed polarized light. Width of field 1.5mm. This photo-micrograph shows the typical texture of this very fine-grained sample.
The few larger grains are fragmented quartz crystals.
They are set in a finely grourxlmatrix of quartz, muscovite and lesser amounts of calcite, sphene, and opaques.
Photo 8. Sample SRF-4A 43'.
Chlorite augen gneiss. Plane polarized light. Width of field 1.5mm. This photomicrograph shows a polycrystalline 'eye' (lower half of photo) in a crushed and sheared matrix. The light grains in the photo are mostly plagio-clase and quartz. The large darker grey crystals are chlorite.
Note the concentration of opaques in the shear zone in the upper right corner.
Photo 9. Sample SRF-5A 42'.
Sheared granodiorite.
Crossed polarized light.
This photomicrograph shows a typical field of view of this sample. Note the large fuzzy grains.
They are kaolinized plagio-clase crystals which have narrow rims of optically continuous quartz. These rims were probably pro-duced as a result of the kaolinization. Note that the rims do not continue along a quartz-plagioclase grain boundary at the left.
The medium grey grains are microperthite, and the light grey grains are quartz.
Photo 10. Sample *RP-5B 175.
Altered olivine basalt. Plane polarized light. Width of field 1.5mm. This photomicrograph is a good example of the texture of this sample. In the upper left is an amygdule filled with twinned calcite and lined with fibrous serpentine. At the right is a phenocryst of olivine which has been completely replaced by serpen-tine. The matrix consists of laths of plagioclase (white) and darker crystals of pyroxene and black opaques. See also photo 11, an enlargement of the matrix.
Photo 11, an enlargement of
.a portion of photo 10.
Sample SRF-5B 175'. Altered olivine basalt. Plane polarized light. Width of field 0.5mm. This photo-micrograph is an enlarge-ment of the matrix.
Photo 12. Smple SRF-7A 116'.
Ultramylonite. Plane polarized light. Width of field 1.5mm.
This photomicrograph shows typical texture of this rock.
Dark shear zones can be dis-tinguished against the back-ground of highly crushed minerals.
See also photo 13.
Photo 13, an enlargement of a portion of photo 12. Sqmple SRF-7A 116'. Ultramylonite.
Plane polarized light. Width of field 0.5mm. The rock is so pulverized that only a few grains can be identified with certainty--some dark nodular sphene, a few quartz grains and a few aggregates of calcite.
Photo 14. Sample SRF-8A 155'.
Brecciated quartz-muscovite schist.
Plane polarized light.
Width of field 1.5mm. This photomicro-graph shows a typical field of view. Two large lithic fraFments are separated by a dark grey shear zone consisting of chlorite, cal-cite, and finely ground quartz and muscovite. The white arains in the rock fragments are quartz which are surrounded by darker muscovite, calcite, sphene, and opaque grains.
Photo 15. Sample SRF-8B 146.5'. Brecciated quartz muscovite schist.
Cross polarized light. Width of field 1.5mm. This photo-micrograph shows parts of three lithic fragments.
Two of the fragments are coarser-grained than the fragment in the lower right.
The larger roundish grains are quartz and the fuzzy material is fine grained masses of muscovite. A thin black line of chlorite and opaques separate the three fragments. Note the similarity of this sample to SRF-8A.
Photo 16. Sample SRF-9A 80°.
Brecciated quartz-muscovite schist. Cross polarized light.
Width of field 1.5mm. The left hand side of the photomicrograph shows a lithic fragment of roundish quartz grains surrounded by scaly masses of muscovite. At the right is a stringy mylonite zone consisting of pulverized quartz and muscovite with carbonate and opaques. This sample is similar to samples SRF-8A and 8B except for the absence of chlorite.
ATTACHMENT No. 4 K-Ar AGE DETERMINATIONS OF SIX SAMPLES FROM THE SCOTLAND ROAD FAULT ZONE GEOCHRON LABORATORIES DIVISION, KRUEGER ENTERPRISES, INC.
CAMBRIDGE, MASSACHUSETTS 02139 for WESTON GEOPHYSICAL RESEARCH, INC.
WESTBORO, MASSACHUSETTS 01581
Sinc rely, Richard H. Reesman General Manager KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MASSACHUSETTS 02139 * (617) 8 1 5-3691 16 May 1974 Richard J. Holt Weston Geophysical P.O. Box 364 Weston, MA 02193
Dear Mr. Holt:
Enclosed are the analytical reports of the K-Ar age determinations on two (2) of the six (6) samples sent to us by Gene Simmons at M.I.T. I have already given these results to you by telephone.
We analyzed sample 58 as a whole rock and obtained an age of about 199 m.y., and we analyzed a sericite concentrate from 8A and obtained an age of about 248 m.y. This latter concentrate contained a significant amount of feldspar, but with a sample of this sort it is often not possible to obtain a high quality mica concentrate. The measured age of sample 8A should be a reasonably good metamorphic age for the rock.
If you have any questions, please do not hesitate to contact me. In the meantime, I am enclosing our invoice for this work. I will contact you as soon as the remaining samples have been analyzed.
RHR/dm encl: 2 reports & invoice #4401 SPECIALISTS IN GEOCHRONOLOGY 8( ISOTOPE GEOLOGY
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA. 02139 * (617)- Ft76-3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
R-2813 Date Received: 22 April 1974 Your
Reference:
SRF 5B (17501')
Date Reported: 14 May 1974 Submitted by:
Richard Holt Weston Geophysical Res. Inc.
P.O. Box 364 Weston, MA 02193 Sample Description & Locality:
Dark basalt drill core, SRF 5B (175.1')
Material Analyzed:
Whole rock, crushed to -40/+100 mesh.
Ar 4° */K " =.01230 AGE=
199 + 9 M.Y.
Argon Analyses:
Ar 4 °*, ppm.
.01647
.01628 Potassium Analyses:
%K 1.095 1.087 Constants Used:
= 4.72 x 10 -1° / year Xe = 0.585 x 10 -1 °/ year K"/K = 1.22 x 10 -4 gig.
Note: Ar 40* refers to radiogenic Ar ".
M.Y. refers to millions of years.
Ar 40*/ Total Ar 40 Ave. Ar 4°*, ppm.
.686
.01638
.645 Ave. %K K 4 °, ppm 1.091 1.331 1
In [X0 Xe Ar4°* +
AGE -
X+
Xe K4°
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA, 02139 * (617) - 8Y6 - 3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
M-2820 Your
Reference:
SRF 8A Submitted by Richard J. Holt Weston Geophysical P.O. Box 364 Weston, MA 02193 Date Received: 26 April 1974 Date Reported: 15 May 1974 Sample Description & Locality:
Sericitized metasediment, drill core ilSRF 8A.
Material Analyzed:
Sericite concentrate with substantial feldspar remaining.
Ar 4° */K " =.01550 AGE=
248 + 9 M.Y.
Argon Analyses:
Ar 4 0 it, ppm.
Ar 4 "/ Total Ar "
Ave. Ar 4°*, ppm.
.09410
.891
.09629
.09848
.791 Potassium Analyses:
% K Ave. %K K", ppm 5.086 5.092 6.212 5.099 Constants Used:
)1/40 = 4.72x 10 -10 / year Xe = 0.585 x 10 -1° / year K 4 "/K = 1.22 x 10 -4 g./g.
Note: Ar 40* refers to radiogenic Ar ".
M.Y. refers to millions of years.
AGE=
1 In [X13 Xe Ar "* + 1 XeXfi Xe K4°
K. FR LJ El", C3 EE FR ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET 0 CAMBRIDGE, MASSACHUSETTS 02139 * (617) 876-3691 31 May 1974 Richard Holt Weston Geophysical Research Inc.
P.O. Box 364 Weston, MA 02193
Dear Mr. Holt:
Enclosed are the analytical reports of the K-Ar age determinations on the remaining four (4) samples of the six (6) we received from Gene Simmions last month.
The amphibole in SRF 1A gave an age of 324 m.y. Samples SRF 2A, SRF 3A, and SRF 5A 42' were analyzed as whole rocks and gave indist-inguishable ages of 256 m.y., 269 m.y., and 272 m.y. respectively.
Judging from past analyses we have done for you I suspect these numbers are about what you expected.
If you have any questions, please do not hesitate to contact me. In the meantime, I am enclosing our invoice for this work. We look forward to serving you again in the near future.
Sincerely, 417*
chard H. Reesman General Manager RHR/dm encl: 4 reports & invoice # 4414 SPECIALISTS IN GEOCHRONOLOGY & ISOTOPE GEOLOGY
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA, 02139 * (617)-a76-3691 POTASSIUM-ARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No. A-2814 Date Received: 22 April 1974 Your
Reference:
SRF 1A up Date Reported: 31 May 1974 Submitted by:
Richard Holt Weston Geophysical Res. Inc.
P.O. Box 364 Weston, MA 02193 Sample Description & Locality:
Coarse-grained amphibolite Material Analyzed:
Amphibole concentrate, -401+100 mesh.
Ar 4° */K =.02069 AGE=
324+/- 14 M.Y.
Argon Analyses:
Ar 4 °*, ppm.
Ar 40*/ Total Ar Ave. Ar 4°*, ppm.
.01967
.679
.01974
.01981
.704 Potassium Analyses:
%K Ave. %K K 40 ppm
.786
.782
.954
.778 Constants Used:
= 4.72 x 10 -10 / year Xe = 0.585 x 10 °/ year K 4°/K = 1.22 x 10 -4 g./g.
Note: Ar 40* refers to radiogenic Ar 40.
M.Y. refers to millions of years.
1 In [X0 Xe Ar40*
AGE=
+ 1 Xe X Xe K
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA. 02139 * (617)- 876.3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
B.-2811 Your
Reference:
SRF 2A Submitted by:
Richard.1. bolt Weston Geophysical P.O. Box 364 Weston, MA 02193 Date Received: 26 April 1974 Date Reported: 31 May 19711 Sample Description & Locality:
Sericite schist Material Analyzed:
Whole rock, crushed to -60/4-100 mesh.
Ar 4° */K 4° =.01604 AGE=
256 + 10 Ky.
Argon Analyses:
Ar 40*, ppm.
.03235 Ar 40 */ Total Ar 40 Ave. Ar 40 *, ppm.
.676
.03307
.03378
.807 Potassium Analyses:
%K 1.699 1.680 Constants Used:
Afi = 4.72x 10 -"/ year Xe = 0.585 x 10 -1° / year K "/K = 1.22 x 10 -4 gig.
Note: Ar "* refers to radiogenic Ar 4 ".
MN. refers to millions of years.
Ave. %K K 4°, ppm 1.689 2.061 1
In [Xl3 Xe Ar "*
AGE=
+ 1 Xe + A L Xe K4°
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA. 02139 * (617)- a.76 - 3691 POTASSIUM -ARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
R-2818 Your
Reference:
SRF 3A Submitted by: Richard J. Holt Weston Geophysical P.O. Box 364 Weston, NA 02193 Date Received:
Date Reported:
26 April 1974 31 May 1974 Sample Description & Locality:
Sericite schist Material Analyzed:
Whole rock, crushed to -60/+100 mesh.
Ar 40 */K 4° =.01690 AGE=
269 + 10 M.Y.
Argon Analyses:
Ar 40 *, ppm Ar 4° */ Total Ar Ave. Ar 4° *, ppm.
.07748
.913
.07756
.07763
.787 Potassium Analyses:
% K 3.782 3.741 Constants Used:
ito = 4.72 x 10 -"/ year Ae = 0.585 x 10 -I° / year K 4 "/K = 1.22 x 10 -4 g./g.
Note: Ar 4 "* refers to radiogenic Ar ".
M.Y. refers to millions of years.
Ave. %K K 4°, ppm 3.761 4.589 1
AGE=
In [21
+ Xe Ar 4" Xe + X x
+ 1 A
K
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA, 02139 * (617)- 876 - 3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
R-2819 Your
Reference:
SRF 5A 42' Submitted by:
Richard J. Holt Weston Geophysical P.O. Box 364 Weston, HA 02193 Date Received: 26 April 1974 Date Reported: 31 May 1974 Sample Description & Locality:
Altered granodiorite Material Analyzed:
Whole rock, crushed to -60/+100 mesh.
Ar 4° */K 4° =.01710 AGE =
272 + 10 M.Y.
Argon Analyses:
Ar 40*, ppm.
.06782 Ar 40*/ Total Ar 40 Ave. Ar 40*, ppm.
.879
.06893
.07003
.872 Potassium Analyses:
% K Ave. %K K 4°, ppm 3.341 3.304 4.030 3.267 Constants Used:
X13 = 4.72 x 10 -"/ year Xe = 0.585x 10 -10 / year K 4° /K = 1.22 x 10 -4 gig.
?kg + Xe x Ar 4°
- Xe K4° Note: Ar 4°* refers to radiogenic Ar 40.
M.Y. refers to millions of years.
GEOLOGICAL INVESTIGATIONS of the PORTSMOUTH FAULT (Novotny - 1963)
PORTSMOUTH-HAMPTON, NEW HAMPSHIRE PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE SEABROOK STATION SEPTEMBER 1974
PORTSMOUTH FAULT INVESTIGATIONS CONTENTS I.
DEFINITION OF THE PORTSMOUTH FAULT II.
INVESTIGATION PROCEDURES A.
PRELIMINARY - GENERAL AREA B.
DETAILED - BREAKFAST HILL ROAD, GREENLAND 1.
COAKLEY SAND PIT 2.
LOCH-COOMBS RECLAIMED BORROW AREA a.
GROUND MAGNETOMETER SURVEY b.
BORINGS INVESTIGATIONS
- c. PETROGRAPHIC EXAMINATIONS III. RESULTS OF INVESTIGATIONS ALONG THE INFERRED FAULT A. NOVOTNY'S "FAULTED" OUTCROP EXPOSURES 1.
ROUTE 1 BY-PASS, PORTSMOUTH 2.
GOAT ISLAND, NEW CASTLE
- 3. BRUMLEY HILL, NORTH HAMPTON B. GRANITE IN THE RYE FORMATION C.
UNCONFORMABLE RYE/KITTERY STRATIGRAPHY D.
RADIOMETRIC AGE DATING IV. CONCLUSIONS REFERENCES 1
2 2
2 2
3 3
4 4
5 5
5 6
6 6
7 8
9 10
CONTENTS (CON'T. )
MAP SURVEY CONTROL, GREENLAND-McKENNA ASSOCIATES FIGURE 1 PORTSMOUTH FAULT INVESTIGATIONS-SITE TO GERRISH ISLAND, MAINE FIGURE 2 PORTSMOUTH FAULT INVESTIGATIONS-GREENLAND TO GERRISH ISLAND, MAINE FIGURE 3 COAKLEY SAND PIT, GREENLAND FIGURE 4 COOMBS POND AREA, GREENLAND ATTACHMENT 1 - GROUND MAGNETOMETER SURVEY, GREENLAND ATTACHMENT 2 - GEOLOGIC BORINGS LOGS ATTACHMENT 3 - PETROGRAPHIC EXAMINATIONS ATTACHMENT 4 - RADIOMETRIC AGE DETERMINATIONS
PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE SEABROOK STATION PORTSMOUTH FAULT INVESTIGATIONS Investigations have been conducted along the general path of the in-ferred Portsmouth fault between Portsmouth and Hampton, New Hampshire, in an attempt to locate and define the inferred feature, and to examine the nature and structure of unconsolidated Pleistocene deposits which overlie bedrock in the area. (Figure 1)
All investigations have failed to locate or to suggest the existence of the Portsmouth fault. Well-stratified outwash sand deposits of Pleistocene age, as exposed in the walls of a number of gravel pits at scattered loca-lities along the general trend of the inferred fault, show no evidence of tectonic faulting subsequent to their deposition.
Consideration of all available facts leads to the conclusion that the Portsmouth fault does not exist.
I. DEFINITION OF THE PORTSMOUTH FAULT The Portsmouth fault was originally postulated by R. F. Novotny to trend southerly in an arcuate path for a total length of 121 miles from Pierce's Island, Portsmouth, to the Taylor River, Hampton, New Hampshire (Novotny; 1963). Novotny's bases for postulating the fault include:
- 1) brecciated and faulted rocks in the Kittery formation in an exposure on Route 1 By-pass, Portsmouth; 2) brecciated and partly silicified Kittery formation rocks exposed on the southeastern shore of Goat Island, New Castle; 3) brecciated and partly silicified Kittery formation rocks exposed near the east end of Brumley Hill, North Hampton; 4) the presence of granitic intrusives in the Rye formation near the Kittery contact; 5) an apparently unconformable stratigraphic relationship between the Rye and Kittery formations along the trend of their contact zone.
Novotny further interpreted the Portsmouth fault to form the steeply west-dipping contact between the Rye and Kittery formations. Displace-ment was inferred to be down on the west, suggesting a normal fault.
Outcrops were reported to be too few and too poor to attempt calculation of fault displacement.
1
II. INVESTIGATION PROCEDURES A.
Preliminary - General Area As a preliminary investigation of the Portsmouth fault, J. R. Rand walked portions of the fault trace as it was defined by Novotny, and examined gravel pits and highway road cuts and construction excavations in a strip about 2 miles wide overlapping the postulated trace of the fault from Portsmouth to Hampton. Each specific outcrop cited by Novotny as proof of faulting was also examined. R. J. Holt of Weston Geophysical Research, Inc. and J. R. Rand together viewed by helicopter the in-ferred trace of the fault between the Seabrook site and Gerrish Island, Maine. J. R. Rand also studied commercial aerial photographs covering the zone from the site to North Hampton, and his own color photographs taken along the path of the zone during the helicopter inspection. Back-hoe trenching and ground magnetometer surveys have also been conducted in Greenland, New Hampshire, 8 to 9 miles north of the Seabrook site, in an effort to locate the fault (Point "A" on Figures 1 and 2). Several bed-rock samples were taken along the zone for radiometric age dating.
B.
Detailed - Breakfast Hill Road, Greenland Just to the northeast of the intersection of the New Hampshire Turn-pike and Breakfast Hill Road, Greenland, a wide area of outwash sands, ice-contact gravels and cobble till deposits was excavated for Turnpike con-struction subsequent to Novotny's field studies in the area (Point "A" on Figures 1 and 2; Figure 3; Figure 4). Within this large area, numerous low, glacially striated surfaces of Rye formation bedrock are now exposed in the floor of the reclaimed borrow area, in contradiction to Novotny's in-terpretation of Kittery formation terrane in this area. Survey control for investigations was provided by McKenna Associates, Portsmouth (map attached).
- 1. Coakley Sand Pit As shown on Figure 3, backhoe trenching in an operating sand pit at the northwest corner of the area exposed additional outcrop of the Rye formation bedrock. Boring PF-1 was drilled on a N5OW (True) bearing at an inclination of about 43 ° to a depth of 276', taking oriented core samples, In a search for a possible Rye/Kittery contact in an apparent folded structure which underlay well-stratified and undisturbed outwash sands exposed in the north wall of the pit.
2
Boring PP-1 encountered only interbedded gneiss, fine-grained schist and thin interbedded quartzites of the Rye formation, and was terminated as it passed to the west of the edge of the sand pit. The structure of the Rye formation in the boring, as indicated by orienta-tion measurements of bedrock foliation, is that of a tight syncline which dips steeply to the west. Five zones of welded breccia were encountered in the boring, the thickest of which included 7.5' of welded quartzite breccia at 249.5' to 257' depths in the hole. The brecciated rock in PP-1 was fresh, compact, thoroughly welded or annealed, and did not show polished or slickensided surfaces on partings.
No mineralization, hydrothermal alteration, shear zones, or other evidence of major faulting was encountered in the boring. The welded brecciation is of the type found frequently in borings in metamorphic rocks in the region, and is interpreted to be associated with strains developed at the time of folding and metamorphism of the region during the Acadian orogeny. Two diabase dikes encountered in the boring were fresh, unaltered, and showed normal intrusive contacts.
- 2. Loch-Coombs Reclaimed Borrow Area As shown on Figure 4, three core borings (PF-2, PF-3, PF-3A) were drilled across the property line between lands of Anthony Loch and Richard Coombs, at the north edge of a reclaimed borrow area to the north of Breakfast Hill Road, to investigate the western boundary of a local magnetic anomaly.
- a. Ground Magnetometer Survey Because the bedrock exposed throughout the Breakfast Hill study area is represented only by Rye formation metavolcanic rocks for as much as one-half mile to the west of Novotny's fault trace, and com-prises no outcrops of Kittery formation quartzites as had been inter-preted by Novotny, the presence of a fault contact between these two formations in this area cannot, by definition, exist. Having no forma-tional contact to investigate for these current studies, Weston Geophysical Engineers, Inc. undertook a ground magnetometer survey to determine whether any anomalous magnetic features might occur which could sug-gest faulting within the Rye formation itself. Technical details of this survey are presented in a report by Weston Geophysical Engineers, Inc.,
attached herewith.
3
The magnetometer surveys show no anomalous magnetic intensities in the zone of Novotny's fault trace in five profiles which were conducted ac-ross the inferred trace at intervals influencing a zone of almost 4,000' along the trace from north to south. In the area of Coombs Pond (Figure 4),
a local magnetic anomaly high was detected on 3 survey lines (Lines 6, 2NR and 2R). The apparent alignment of this anomaly is about N10E, parallel to the strike of bedrock foliation in the area. Novotny's inferred fault trace in the same general area strikes about N40E, transverse to foliation.
- b. Borings Investigations Two borings, PF-2 and PF-3A, were drilled at approximately 40° in-clination to the southeast to investigate bedrock conditions at the western boundary of the local magnetic anomaly. A third boring, PF-3, was drilled vertically to determine bedrock depth prior to drilling PF-3A. The results of these borings are generalized in cross section on Figure 4, on which also is projected the magnetic profile of Mag. Line 6.
Overburden, which was not specifically sampled in these three borings, is comprised of outwash sands overlying a sandy boulder till. Boring PF-2 was drilled to a depth of 271' (about 201' in bedrock), in light gray banded gneiss and dark green amphibolite, intruded locally by weakly magnetic diabase dikes. PF-3 was drilled to a depth of 50' (10' in bedrock) in gray and greenish gneiss. PF-3A was drilled to a depth of 204.3' (124' in bedrock) in gray banded gneiss, dark green amphibolite and, at the bottom 5' of the boring, notably magnetic, salmon-feldspar gneiss, with a single diabase dike. The location of the basal magnetic gneiss in PF-3A conforms reasonably with the downward projection on the local bedrock structure of the magnetic anomaly found by surface surveys. The weakly magnetic dikes in the borings conform with a slight increase in magnetic intensity found by surface surveys.
The condition of bedrock in PF-2, PF-3 and PF-3A was weakened by weathering effects on moderately closely-spaced jointing to about -70' Eleva-tion. In no boring, however, were there slickensided or polished joint sur-faces, gouge zones, hydrothermal alteration or any other visible evidence of bedrock faulting.
C. Petrographic Examinations The petrography of three samples of drill core from Boring PF-2 has been described by Professor Gene Simmons and Dorothy A. Richter of Massachusetts Institute of Technology.
Sample Depth Field Description Petrographic Description PF-2A 99.5 99.9' Gneiss Felsic Metatuff PF-2B 136.0 -
136.5' Diabase Metabasalt PF-2C 262.0 -
262.4' Amphibolite Fine Grained Amphibolite Simmons and Richter conclude from their studies that "Evidence for dyna-mic structural deformation, either recent or ancient, is entirely absent. In sum-mary, we find no petrographic evidence that these three samples are associated with a fault. If a fault does exist in the region from which these samples were obtained, then either its deformation was not so pervasive as to effect these three samples, or else the deformation occurred before metamorphism and all petrographic evidence has been erased by the last metamorphic event".
The full report by Simmons and Richter is attached herewith.
III. RESULTS OF INVESTIGATIONS ALONG THE INFERRED FAULT None of the current investigations along the path of the inferred Portsmouth fault has detected or suggested the presence of a through-going fault structure along the zone of the Rye/Kittery contact between Portsmouth and Hampton. No exposure of Pleistocene deposits seen along this zone has shown internal structures suggestive of tectonic fault displacement.
A. Novotny's "Faulted" Outcrop Exposures
- 1. Route 1 By-pass, Portsmouth (Point "B" on Figures 1 and 2)
Novotny cites a road cut on the north side of the Route 1 By-pass in Portsmouth as suggesting the presence of the Portsmouth fault nearby, but not within, the road cut exposure. This exposure shows two steeply west-dipping zones of weathered and rusty rock material interlayered in gneiss and quartzite. In one of these weathered zones, an open drag fold was interpreted by Novotny to represent differential movement, down on the west.
This folding could also represent simple folding of the beds, signifying an anticline to the west.
The rock materials within these two weathered zones are not slicken-sided or mineralized, and the rock adjacent to the weathered zones shows no hydrothermal alteration. Very similar open folding can be seen in an un-weathered exposure of quartzitic rock near the Rye/Kittery contact, 3.54 miles S52W of this locality, on the west right-of-way of the New Hampshire Turn-pike, where there is no evidence of fracturing. Fold structures of the type 5
seen at the Route 1 By-pass and on the New Hampshire Turnpike right-of-way are most logically explained as simple small-scale drag folding formed during the regional folding of the Rye anticline. The exposure on the Route 1 By-pass is suggestive of faulting only because it is weathered. Rye formation rocks occur on both sides of the weathered zone at the Route 1 exposure.
2.
Goat Island, New Castle (Point "C" on Figures 1 and 2)
Bedrock structure on the southeast shore of Goat Island is a complex jumble of brecciated Rye formation metavolcanics and quartzite. The breccia is welded, and is intruded by diabase dikes. No "trend" of faulting is ap-parent at this locality to suggest a through-going fault plane which might connect this exposure with the exposure cited on the Route 1 By-pass, 2.1 miles to the southwest. The apparently random distribution of meta-volcanics and quartzite breccia blocks suggests that fault structure in this area may represent explosion breccia, which Hussey (1962) has also found as discontinuous masses 3 miles to the east on Gerrish Island, Maine.
Hussey suggests that the breccia at Gerrish Island may relate to volcanic activity associated with the Cape Neddick and Tatnic volcanic complexes, southwestern Maine.
3.
Brumley Hill, North Hampton (Point "F" on Figure 1)
The brecciated quartzite cited by Novotny for the east end of Brumley Hill showed some healed fracturing and rusty staining in a dark, fine-grained quartzite. Billings (1956) interpreted this area to lie in a broad fold zone in the Rye formation. No through-going shears were apparent in the exposure to suggest the presence of faulting. The exposure no longer exists, having been removed during construction of a new north-bound lane of the New Hampshire Tunrpike.
B. Granite in the Rye Formation Novotny states (1963; p. 147): "Although metamorphic zones are apparently not displaced because of the fault, the presence of concordant foliated and granulated Breakfast Hill granite only in the Rye formation and near the Kittery formation contact supports the hypothesis of a fault de-veloped during the Acadian period of orogeny, along which deeply buried and intruded portions of the Rye formation were elevated". (Point "D" on Figures 1 and 2) 6
Foliated granite, seen in a number of places in the Rye formation, appears to be a primary metamorphic constituent of that formation, having formed by recrystallization ("granitization") of the inherently feldspathic Rye formation rocks. These granitic masses appear genetically related to a process of metamorphism within the Rye, rather than to plutonic in-trusions from a separate deep-seated source. Because of the fundamental lack of feldspar in the Kittery formation, furthermore, no comparable granitization of the Kittery could have occurred at the time the Rye was being recrystallized and granitized.
Whereas the granites of the Rye formation to the east of the Rye/
Kittery contact do not in themselves offer any proof that the Rye has been elevated relative to the Kittery, plutonic intrusives of the Exeter diorite are found in the Kittery formation to the west of the Rye/Kittery contact, tending to negate an hypothesis of fault displacement based on the presence or absence of igneous rocks in the metamorphic terrane.
(Point "E" on Figures 1 and 2)
C. Unconformable Rye/Kittery Stratigraphy Whereas Novotny interpreted an unconformable stratigraphic rela-tionship between the Rye and Kittery formations in the area between Ports-mouth and Hampton, outcrops of the two formations are widely scattered, and the contact between these formations is nowhere exposed along the 121 mile path of the inferred Portsmouth fault. On Gerrish Island, Maine, about 5 miles east of Portsmouth, Hussey (1962) interprets the Rye/Kittery contact to be conformable, grading upward through progressively less feldspathic gneisses of the Rye formation into biotite quartzites typical of the Kittery.
Novotny, Hussey and Billings (1956) all define the Rye formation as metavolcanic and the Kittery as metasedimentary, predominantly quartzite.
Novotny interprets the contact between these two formations to be defined by a major fault structure, while Hussey and Billings do not. Novotny, further-more, defines the geographic location of the Rye/Kittery contact as much as three-quarters of a mile to the east of the contact trace defined by Hussey and Billings. Figure 1 shows by a dotted line the contact between the Rye metavolcanic member and the Kittery formation as defined by Billings to the southwest and by Hussey to the northeast.
7
Current investigations have indicated that Novotny's contact trace trends from Portsmouth to North Hampton through a terrane characterized only by bedrock exposures of the Rye formation metavolcanic member.
Since the metavolcanic member of the Rye is made up of an original sequence of different types of volcanic rocks and interbedded sedimentary units, unconformable stratigraphic relationships might be expected in the zone where Novotny has defined the Rye/Kittery contact. Such relation-ships would not, however, signify the presence of a major fault zone.
Furthermore, foliation structure symbols shown on Figure 1 (after Novotny and Hussey; and J. R. Rand reconnaissance) indicate a reasonable parallel-ism of bedrock structure along Novotny's inferred fault trace in this area, with no suggestion of the alledged formational unconformity.
D. Radiometric Age Dating Four outcrop samples (PF-S1, -S2, -S3, -S4) were taken at intervals along the path of the inferred fault for radiometric age dating (K-Ar). The locations and K-Ar ages of these samples, along with three other samples taken from Borings B2, B4 and B9 at the site area in 1969, are defined on Figure 1. Age determinations were obtained by Geochron Laboratories, Division of Krueger Enterprises, Inc., Cambridge, Massachusetts.
Sample Location Rock Type Material K-Ar Age PF-S1 Towle Road, Hampton Quartzite Biotite 268+10 M.Y.
PF-S2 Rte. 151, North Hampton Quartzite Amphibole 308+14 M.Y.
PF-S3 Rte. 1, Portsmouth Gneiss Muscovite 294+10 M.Y.
PF-S4 Rte. 1, Portsmouth Quartzite Mica-Quartz 262+11 M.Y.
B2 129.5' - Boring B2 Qtz. Diorite Biotite 294+ 9 M.Y.
B4 93.0' - Boring B4 Schist Biotite 254+ 9 M.Y.
B9 12.3' - Boring B9 Bio. Diorite Biotite 284+ 9 M.Y.
No anomalously young ages were found in this dating program. All ages found conform to previously reported regional data which indicates a Permian thermal event for the area (Zartman et al, 1970). The lower ages obtained in this investigation (PF-S1, PF-S4 and B4) are mineral dependent, with argon loss associated with the fine-grained materials analyzed.
8
'IV. CONCLUSIONS Field investigations have shown that 1.
The graphic trace of the alleged Portsmouth fault bears no meaning-ful spatial relationship to the contact between the Rye and Kittery formations, along which the fault was postulated by Novotny to trend, 2.
There is no evidence of the alleged unconformable relationship be-tween the Rye and Kittery formations.
3.
There is no evidence of anomalous magnetic intensities on the in-ferred fault trace in Greenland, New Hampshire.
4.
Examination of drill cores in the area of the alleged fault trace in Greenland, complimented by petrographic studies of core samples, indicate no evidence of faulting in that area.
5.
There is no evidence of a through-going fault structure associated with the specific bedrock exposures cited by Novotny as indicating the presence of the Portsmouth fault.
6.
There is no justification for ascribing the presence of granitic rocks at ground surface in the Rye formation terrane to the differential uplift of these rocks along a nearby fault.
7.
There are no meaningful variations in radiometric ages of rocks along the alleged fault trace.
8.
Ground and aerial examinations have failed to detect any anomalous landforms or stream patterns along the trace of the alleged fault.
- 9. Pleistocene deposits exposed in road cuts and gravel pits along the alleged fault trace show no features which might imply tectonic faulting in the area.
The current investigations have concluded that the Portsmouth fault does not exist.
John R. Rand Consulting Geologist September 1974 9
References:
Billings, M. P. (1956) The Geology of New Hampshire - Part II: Bedrock Geology. Department of Resources and Economic Development; Con-cord, New Hampshire.
Hussey, A. J. II (1962) The Geology of Southern York County, Maine.
Special Geologic Studies, No. 4, Maine Geological Survey; Augusta, Maine.
Novotny, R. F. (1963) Bedrock Geology of the Dover-Exeter-Portsmouth Re-gion, New Hampshire. Doctral Thesis, Department of Geology, The Ohio State University; Columbus, Ohio.
Novotny, R. F. (1969) The Geology of the Seacoast Region, New Hampshire.
Ed. T. R. Meyers. Department of Resources and Economic Develop-ment; Concord, New Hampshire.
Zartman, R. E., P. M. Hurley, H. W. Krueger and B. J. Gilletti (1970) A Permian Disturbance of K-Ar Radiometric Ages in New England: Its Occurrence and Cause, Geological Society of America Bulletin, Vol. 81, 3359-3374.
10
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'0°
- MEAN SEA LEVEL 50'- 0 57 000 LOCAL MAGNETIC ANOMALY MAGNETIC PROFILE (GAMMAS)
-0 FIGURE 4 PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE SEABROOK STATION PORTSMOUTH FAULT INVESTIGATIONS COOMBS POND AREA BREAKFAST HILL ROAD-GREENLAND, NEW HAMPSHIRE John R Rand, Consulting Geologist
ATTACHMENT NO. 1 GROUND MAGNETOMETER SURVEY BREAKFAST HILL ROAD AREA GREENLAND, NEW HAMPSHIRE WESTON GEOPHYSICAL RESEARCH, INC.
WESTBORO, MASSACHUSETTS
GROUND MAGNETOMETER SURVEY BREAKFAST HILL ROAD AREA GREENLAND, NEW HAMPSHIRE
SUMMARY
This report details a ground magnetometer survey conducted by Weston Geophysical Research, Inc. in the vicinity of Breakfast Hill Road, Greenland, New Hampshire. This study was completed in conjunction with a general geologic investigation of the inferred Portsmouth fault, as proposed by Novotny (1963).
Five separate magnetic lines were run across the trace of the in-ferred fault. No magnetic evidence for faulting was found on any of the profiles.
INSTRUMENTATION The survey was begun with a vertical field, torsion magnetometer (Askania, Model Gfz), which is tripod mounted and must be leveled prior to each reading. Because this procedure is difficult in soft or swampy ground, which is extensive in the investigation area, the vertical field mag-netometer was replaced with a total field, proton precession magnetometer (Geometrics, Model G-816), which requires neither tripod nor leveling.
METHOD The survey method consisted of making total magnetic field intensity measurements at paced intervals along a predetermined line. The interval used varied from 50 to 100 feet. The magnetic sensor was oriented north (magnetic) for each reading, and readings were repeated to insure precision.
A base station was established, and base station readings were taken reg-ularly to determine the diurnal variation of the earth's magnetic field during a given portion of the survey. The diurnal variation has been removed from the final profiles. Careful notes were taken during the survey so that the presence of magnetic interference sources (i. e., power lines, buried metal, houses, parked vehicles, etc.) could be considered in the final analysis.
RESULTS Total field intensity magnetic profiles were made from data for five traverses in the area of investigation. As shown in Figure Ala, Profiles 2R, 2NR and 6 are located at distances extending up to approximately 2,500 feet northeast of Breakfast Hill Road, near Coombs Pond. Profiles 4 and 5 are located at distances extending up to approximately 1,500 feet southwest of Breakfast Hill Road. All five magnetic profiles crossed Novotny's inferred fault trace at nearly perpendicular angles. Any magnetic expression of Novotny's inferred fault (within the Rye formation) should, therefore, have been readily apparent.
Figure Ala locates the inferred fault trace relative to magnetic pro-files reported in Figure Alb at or near the following profile points: 3+0 on Line 6, 1+5 on Line 2NR, 16+0 on Line 2R, 15+0 on Line 4, and 13+0 on Line 5.
No evidence of the postulated fault was found. Further examination of the profiles indicates that localized anomalies, probably due to local variations in magnetic mineral concentrations known to be present in the Rye formation, appear on each of the traverses near Coombs Pond. Pro-files 6, 2NR and 2R show such an anomalous condition, which appears to trend N10E in the vicinity of the three lines. It should be noted that this strike is parallel to the bedrock foliation of the area.
MAGNETIC PROFILES FIGURE Alb 57,200 LINE -6 57,200 0 57,000
,,,e 57,000 44(
`
2
, s,
....tr`
N
..../
'D
56,800.,,,___...._,....__,____,:___.......,...__..,,..--....-
56,800 57,000 BREAKFAST HILL ROAD AREA GREENLAND, NEW HAMPSHIRE 1
56,600 2.0 6+0 8+0 by WESTON GEOPHYSICAL RESEARCH, INC.
1 I
I 1
I 1
1 1
1 56,600 10+0 12+0 14+0 16+0 18+0 20+0 22+0 24+0 26+0 2840 2440 57,200 57,000 56,800 56,600 10+0 12+0 56,600 1
1 I
1 1
0K/
2+0 4+0 640 8+0 57,200 LINE 2NR 57,000
\\
`,,
56,800 56,600 1
1 1
1 0+0 240 4.0 6+0 8+0 57,000 56,800
56,600 1
I I
I 2+0 640 8+0 1040 33,000 32,800-32,600 4.0 1
1 I-56,600 1040 1240 1440 16+0 1
1 1
1 2+0 14+0 1640 18+0 2040 22+0 2440 26+0 LINE 4 33,000 32,800 1
16+0 1
18+0 1
2040 22+0 1
24+0 32600 26+0 4
6.0 8.0 10+0 12+0 14+0 57,400 57,200 57,000 56,800 56,600 28.
10 1
1 3440 3640 32+0 4
g LINE 2R
"'4+
GROUND MAGNETOMETER -SURVEY for 56,800 PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE SEABROOK STATION
++4+-4-.4 57,000 (n4z2 56,800 LINE 5 FIGURE Al
9 WOODS
.--LLINE 2N!
I I 4 II
..,..t._
\\.'-----"St------.---?
lz= ZVz=
1,,,,
ii
?
- i:';
111-172R Af - I ta til 5
Ns.,
- i.
li II 1 1 I j P
I i I i Q li II II I 1..;
I r
\\78\\
i...,
,, 1 g
z 0a
,Iii I
I, ii I-1 /
11 BREAKFAST
-\\\\t.
0'iti R.W. COOMBS r---_,
FARM I000 2000 FT.
BASE MAP: PSCoNH AERIAL PHOTO,1974 AREA LOCATION FIGURE Ala
ATTACHMENT NO. 2 GEOLOGIC BORINGS LOGS BORINGS PP-1, PF-2, PF-3, PF-3A
BORING LOCATION See Breakfast Hill Rd. cite plan INCLINATION 48.5" BEARING 14 50 W DATE START/FINISH Feb. 19, 1974 / March 21. 1974 CASING ID 3 in.
CORE SIZE 2-1/8 to 1-7/8 tn.
TOTAL DEPTH 276.0 it DRILLED BY American Drilling IL Boring Co.; K. Allen GROUND EL 04SL) 79.1 ft DEPTH TO WATER/DATE 13.7 it /
LOGGED BY Soil - K. Polk; Rock - J. 11. Rand EL MSL ft SAMPLE RATE OF ADV.
min/ft WATER coNTerr " RQD PRESSURE TEST STRIKE DIP F = Fellation j = joi nt C = Contact B 7 Bedding SOIL AND ROCK DESCRIPTIONS m e (Weathering, defects, etc.)
(Type, texture, mineralogy, 0 r4 color, hardness, etc.)
C' 6)
Graphic HM psi Computed It
_10 'om/sec Depth ft Type and No.
N or Reg.
79.1 111,1,;1 0 0= Slickenside
+6 440
- 20
-20 100 100 100 100 100 100 100 100 100 96 100 100 100
. 92 96 100 54 100 100 100 100 100 97 100 100 96 100 100 100 100 99 97 100 100 100 4.0 4.7 6.4 4.1
- 6. 8 9.0 5.0 2.7 5.1
- 5. 6 5.5 5.0 R. 0 15.5 13.1 7.3 6.8 7.9 10.0 6.0 11.2 12.8 18.4 9.0 6.6 17.4 7.2
- 5. 0 7.4 24.4 5.0 4.0 6.2 5.0
- 12. 8 I
Ai 0
21 25 74 50 56 89 35 62 62 12 0
43 42 22 64 70 95 100 100 92 88 73 65 63 Rfi 73 95 93 75 92 95 90 100 58 OF ROCK N37E, 74N1.1. F 3
NNLOEE: 2 280; SJ N45W, 42NE J N5OW, 4NE J N75E, 8NW J N33W, DINE J N52 1052F,, 78NW F ItigV7WE 1 1083E, 328E.1i OW, IONE J fle; NE 3 N15E, 7310W F N20E, 6210W F NiOW, 775W 1' 1041W, 0010E S NfifiE, 63NW F NO6E, 74NW F 1033E, 09NW 1447E, 35SE J 14 7
- at
-z li I
1
- I 11 1
-- 161 1
r.e R1 I
1r i
7 5.5 0
0 5
0 60 70 80
.0 Oi 1
20 30 4
I NX-1
- NX-2 II NX-3 I NX-4 I NX-5 NX-6 NX-7 I
- NX-8 I NX-9 I NX-10 I 10X-11
=14X-12 NX-13 I
I NX-14 1N31-15 NX-17 IINX-18
- NX-19 I NX-20 NX-21 NX-22 FOX-23 NX-24 NX-25 FOX-IS NX-27 FOX-IF
, X-29 11X-3(
FOX-31 NX-32 NX-31 NX-34 NX-35 A
ZI TOP I FOX-SO Minor rusty Fresh and hard. Local Slight wx on minor rusty and surface foliation and Mints name effects an Iflints and same partings. Parting.
Slight wx not slickensided.
D Minor runt Slight six Moderate wx Fresh and hard. Minor rusty, vuggy zones as-Moderate wx sociated with joints and partinga not allekensided.
i>
Minor rusty Slight an Fresh and hard. Local Minor rusty zones of slight to moiler-ate wx on joint surfaces.
Not slickensided.
Moderate wx o
85 Joint Fresh and hard. Joints and partings are clean, not slickensided.
Hard, dense.
Calcite' coating D
Fresh and hard. Joints and partings are clean except in narrow rusty-stained zone at 80.5-00.8'. Not al ickensided.
Moderate wx Rusty stain Fresh and hard. Some thin calcite coatings on joints. Joints and part-Inge not alickensided.
Vuggy Fresh and hard through-out. Joints and partings D
are generally clean. Not wx. Surfaces are not slickonsided.
Fresh and hard through-Minor chlorite nut. Joints and partings Pyrite coated are clean. Not slicken-,L---
sided. Has only very minor tendency to part on foliation.
1)
On foliation Minor vu I
1 Quartzite
,7_brag folds - sense of
- * * * *
- m movement west aide up to
- -:-.7-the east - syncline to west Rye Rye formation. Fine to :
. - *
- Welded very fine-grained, mcd-
- --brecela lum dark gray. Thinly :
- ** "** Welded and evenly foliated, meta- :
"IZA
'IvA i
Mime volcanic. Fine feldspathit:
.r i
D
-7 4*=-"
'-' 1'-l. * * *J
X'4.17
'VV..,
.c._7 --*
.,...iss I
Cnel quartzite. Brecciated 7
'
- 8.
fracturen welded with --
calcite.
ur,q1,, s Z
(amiss Fine-very fine Ic ry klapathi6:
quartztte with interbeds oC Gneiss light grriy feldspathic z gneiss. Medium-grained :
Gneiss Broken contact-minor rusty _:
0 5 WNWA
- Fri,
,,,,,A
--.7-'""
FA 4 i-* '
g -
4' Diabase. Fine, dark ray.
8 7. ELM 1 9119 t al tart
,.2-
- "'l,'*
.1...s.__..
..4_-,-:--7
,-4. c-,
',-_---4-:-__.
ense o rag o s suggests_
Quartzite syncline In west.
Quartzite Rye metnvolcanics. Fine,-
Quartzite evenly laminated fold-Z
...,. spathie quartzite. Din- _
' n'la "' ' e erete fairly Pare 'I uartzit beds.
Medium grained Rye formation. Pretinmi-:
nantly fine-grained, dark -
INA r A IA A'I 1
I
/
ri f
r A 1
I i
.1r, I
V, 1
TO 1
i I
1 1I y,,..;
.-_-_--.7...--.;
7-';* *.-
..*_1_7 ;,-
x..y.** Yv l'-3:*'*'....
- -- 7,,
) --
4-.,:.:
- 7---'-*
--.1--_-__- _-
- =7"-4*::
-- -.7.7:1-;
2----'-
-'_r_l*
22.
1=-
--7
-=-_'..-:.:.-.-
- 144:4).(,
=-..:17--::
- -3--7-2-----*
F*_-_--=
_L,_*_,....
'1"-.'..)-'-'
A a...
f.,..,y,y.
---7:-----
.71Quartzite Gneiss gray hornfelsie schist.
Quartz-Very dense texture. Inter:
feldspar layered with cones of 4:
gne MA qua rtcose. Feldspathic -
gneiss, medium to coarse:
Garnets (?) grained, light gray. Air:
Dark fine contacts are tight, (used.:
feldspathic Somewhat transitional...;
hornfels Interlayered fine-grnined:
Quartzite feldspathic gmeiss, Light" gray, and fine-grained, :
Oneida dark gray horefelsic -_
schist.
Welded micro-fault Sense of some open drag -7, folding suggests that ayncline is to the west. Z Rock fabric offset locally -
Fold sense by welded micro faults. :
Syncline to west Micro fault- -
welded Rye formation. Predomi;
,, rt. p. nantiv fine-grained, dark:
"a ' r gray (horrifelsie) felds- -:
pathic schist. Very hard::
Almost massive texture.:
erbedded locally as --
Int with fairly pure silicate shewn white quartzite beds. ***=
Quartzite Nye formation, ns ilium,:
Fairly evenly, thinly _:.
laminated throughout, although laminae locally :,
are wavy, Rome COMpICK:
- folding, Welded breccia gneiss 2
nt 0
N N - Standard penetration reslatance, blows/ft Hee - Length recovered/length cored, 1 RQD - Length of sound core 4 In. end longer/length cored, '1 s
- Split spoon sample 4 Groundwater U - Undisturbed samples F-Fixed piston P - Pitcher 0 - Osterberg C - GE!
D - Drilling break it - Coefficient of
_ wx - Weathered, weathering permeability S - Shelby tube N - Denison NOTES 11 No clays presi*nl; Liu refore no water contents were determined.
x - Oriented core S EABROOK STATIO N PUBLIC SERVICE H
CE COMPANY1F NEW AMPSHIRE' t YANKEE ATOMIC ELECTRIC COMPANY ei titled engineers. OnraNttrImm nt Dale: May Li, to74 Project 72136 PACE of 2 I LOG OF BORING PI, 1 (1) OVOTECHNICAL. IENOINIZERS
BORING LOCATION See Breakfast Hill Rd. site plan INCLINATION 48.5° BEARING N 50 W DATE START/FINISH Feb, 19, 1974 / March 21. 1974 CASING ID (in.
CORE SIZE 2-1/8 to 1-7/9 In.
TOTAL DEPTH 270.0 ft DRILLED BY American Drilling & Boring Co, ; K. Allen GROUND EL IMSL) 79.1 ft DEPTH TO WATER/DATE 13.7 ft /
LOGGED BY Soil - K Polk hock, R. Rand EL.
MSL it SAMPLE RATE OF
- ADV, min/ft cWoNATTEENT R r RQD PRESSURE TEST STRIKE, DIP F e Foliation
,o C = Contact B = Bedding SOIL AND ROCK DESCRIPTIONS rc,.., (Weathering, defects, etc.)
(Type, texture, mtheralogy, 0 84 color, hardnena, etc.)
° ia Graphic UM mil Computed k
10- om/aec Depth It Type and Na.
N or Rec.
If 'WI,
n S = Slickenaide CONTINUED FROM PREVIOUS PAGE ; -
-8(1-'
-I ocr-1
-1 n 1 7.
^1 7
-720
- ..2
.722 3
- i 5
6 NQ-110 Q-37 Q-3 8 Q-39 Q-40
@-41 Q-42 Q-43 Q-44 Q-45
- I 9-46 1 Q-47 I 03-48 1 NQ-49 NQ-50 NQ-51 1 1,103-52 1NQ-53 I NQ-54
- NQ-55 11003-56 1 NQ-57 I NO-58 NQ 59 INQ -
1 NQ-61 1003-62 100 100 100 100 96 98 100 100 9
100 92 100 100 100 100 100 100 100 100 100 98 100 1110 100 100 100 100 9.2 4.8 50 5.2 5.4 6.6 5.6 4.0
- 9. 8 0.0 7.8 18.0 6.8 3,6 4.2 8,0 8,0 14.0 5.0 4.0 1.0 7.0 8.0 6.6
- 6. 0 6.0 0,8 a
100 89 87 100 99 71 95 50 93 58 0
52 100 100 100 65 100 100 40 98 97 45 33 43 33 58 100 ril g
I
/14 I
I N23E 7RNW F N82W
, 42SW J N32W, 28NE J N32E, 1128E J N18E, 000E.1 N45W, IONE.1 N18W, VINE J NOW, filSW J N40E, 01SE J N35E, 16SE J NFI8E, 34SE J MOE, 57SE J NO2E., 60NW J N731A, 35SW J N82W, 59SW J N15E, 85SE I.
NROE, 11SE S l'InaW, 888w J 1,,Tsg: 721 Fs N15E, 117SE F
- N31_,
E.10sE s WOW, 15NE S N24E, 38SE S POSE, 75SE J N13E, Horiz. F N75W, 5NE J NOSE, Vort E:
N10E, 75SE E N42W, 50NE S
.-I e
'-- iti
- e g
- 111,I
- I
- =
- i II L.
t
_ N I
1181
!iiE a
- 1
- 18, 7
=
- I
.7 Mislatch Fresh and hard. Some Dn-minor powdery effecta ry on come loint flfi pant-Inge. No polishing.
Fresh and hard. Joints and partings show only local 111 Inor wx effects.
Partinga are not polished inor runty Minor Fresh and hard. Joints D
and partings show only D
l minor wx effects, Not slickensided or polahed.
l Chips-slight wx effects Fresh and hard. Excell-cat drilling. Partings in diabase break across core. Not jointed. Not wx or slickensided.
Slight wx Fresh and hard. Only minor surface ox effect on ioints and partings.
Not alickensided, Pyrite stain Chips-fresh Slight wx Fresh and hard. Only m inor surface on effects Pyrite on loints and partings.
Slight wx Not A Itukensided..
Not wx Vuggy Fresh and bard. Only mlnor surface wx effects.
Chips-slight surface wx 7-1I, ocal 01: *
. x.
T--_-.,
.;'L-:-..-.7, 7:.--4 7;:-
. +/- r- -- t.
v x xx
... _L 7, -;,,
- 1-.7 I' 1:;
Y X *I'
.. 2---,-1 4.,,,,
s
.`4`.<
r
.1.- f..-.i
.1-.1-f 4-r t' 1 +- t t
-t-t +-Ft 1-I r-,
-"seaw'Medluni (inn:::: Predominantly quartzite.
Very fine-grained, medium gray. Fairly massive.
Local interbeds of felde-alcitle pathic gneiss. Fused fault plane at 155.3'.
d oing Rye formation. Fine-graine dark gray feldspathic quart-cite. Fairly evenly, but vaguely foliated.
Iuartzite neiss Rye formation, as above with local zones of folds-pathized quartzite and fold-spathic gneiss.
coarse Diabase
...- Welded breccia at contort s p.'s.
e-18 FA II fli AINA rhr
-I Chill Diabase, Medium-grained dark gray with white pheno cryst spotting. Notably calcitic.
Diabase, as above.
Fused contact r0 III x x,.
'-1
-.L,.'_
w A v
=RV V x
..J...,1 7-,-Y _
.;=..2,
""c 'o-
' " 7 A '...: zt 4--4,";
7
---x
=;..-
`1,--x
--.4, J Alms F..-7.7,*__
18 7 Rye formation. Fine-grained, medium to dark gray. Feldspathic, evenly foliated throughout.
Rye formation. Fine-grained, dark gray. Event foliated feldspathic quartzite Quartzite. Fine, medium gray.
, 49.5; Fused contact VA I
I Welded breccia. Quartzite fragments, ts, angular ith sons w
veining. Annealed rock throuchoqt, Ir A IA
/ A uartzite Rye formation. Predonti-nantly fine-grained, dark gray feldspathic quartzite.
Diabase
- Diabase, Fused Toil ae
- 276 7
BOTTOM OF BORING at 14 - Standard penetration reaistance, blows /ft Flee - Length recovered/length cored, %
RQD - Length of sound core 4 in. and longer/length cored, %
B - Split spoon trample
- Groundwater U
- Undisturbed samples S - Shelby tube N - Deni*on 0- Osterberg G - SKI D
- Drilling break k - Coefficient of wx - Weathered, weathering permeability F-Fixed platen P - Pitcher NOTES SEABROOK ST ATIO N PUBLIC SERVICE COMPANY OF' NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY pi totted engineas. -- -
Date: May 11, 1971 Project 7286 PAGE 2 of 2 LOG OF BORING IF I (1) OROTISCIINICAL R1.011,116C1111
Breakfast 11(11 'load BORING LOCATION Greenland, New Hampshire INCLINATION 40
- BEARING 0500 DA r F: sTAFIT/Filosti July 9, 1974
/ July 24, 1971 CASINO ID
- 1 In CORE SIZE
- 2-1/0 in, TOTAL DEPTH 271.0 ft DRILLED TlY American Drilling di Boring Co.; K. Allen GROUND EL 04SL) t 02. 0 ft DEPTH TO WATER/DATE -2,1 It / July 19, 1974 LOGGED BY Soil - K, Ii. Polk; Hock 1. It, Eland EL.
MSL ft SAMPLE RATE OF ADV.
mln/ft
,VaPeNi.. or RQD PR ESSUR E TEST STRIKE, DIP F = Foliation j -, j o in t C = Contact R = Bedding SOH. AND ROCK DESCRIPTIONS to
,,, ;.1 'Weathering, defects, etc. I (Tn.., texture, mineralogy, 0 'Ea' color, hardness, etc.)
rj (.,
'd Graphic t 52, 5 4'dn pal Computed k
1 fl'Icm/sec Depth ft Type and No.
N or Rec.
v 1 P n
5 511ekensid
, ro 1 30 --_
In
- 20 40
-no 716
-720 7730
-10 7- -,n 700 1
.-711
_qt) an In rin I
1211
_1 3n
-rtt.**
"- I I
NX 2 NX 3 I
XX 4 I
NX-5 I
NX -1 i NX-7 I NX - 4 I 'OX-9 No. I t XX 11
'OX-12 I
50 90 100 100 100 04 100 100 Inn 9=
97 27 7,0 5 0 7,0 1.4 1.0 1, n I
- 5. 7 1
(.1 30 0
0 n
32 ni hi 52 40 9
3(1 FAIR 22'
,7 Is" 4i t's 1
Sand a m Subject to sligh t wx se Moderate no througloul and parts Slighl to readily no lid la i Inn.
moderate wx C ore characterized throughout liv disks 1 '2" i n 2" i n tHnor vuggv lenal h. Minor tan rusty staining on Slight viix 'Mints. Not slIcken-sided or polished,
- vogg, Moderate wx Slight wx throtiout on foliation gh Small throughout Stibieel In slight WN Characterized kw per-pervasive vugs vasIvii small yeas.
Parts on foliation al 1/2" to I" intervals.
Core contains numerous small vugs Fresh pyrite fats Fresh internalk, hut stildect 10 11.1g develop-ment Ihrmighotit. itlaN Severe voi he wx it:Meilen Joint and tat ri logs 111, not sliekensidelLor p ol-Vtargy Pyrite Ishell.
s.,* ii
"----,)
cii_),
I.
-i---:
i kir t7:-__
t-1 1-1 "'"-- '
t ii t I i I,
? ' '
M alai se anti gneiss houlders 1 ° )
7n, Top of rock 1 ?)
4/%1 Drag Gneiss. Banded light and me,)
ro idim him g:tav. Fine-grained, thinly laminated. Fused din-itasti inclusion at 70',
3. Contact !mitten.
t !
Not slickensidit r A V
A
',LIU 1113/13., I in, cla A:
Contact broken, Not slickensided.
Quartz Q"artz Gneiss. Bnded in thinly laminated light and medium gray, Fine a
In Vert fine grainitil, leirispathie with Inca 1, 1.,_,, \\ ittlarizItie or cherty handing.
Definitely not Killer, Ottart-zile, Probably melamorphnse acid voleanies, 11,3111us 1110re foldspathle al 11'1, 119, 7,11,1km contact. Not slickensided.
Ferl Fl To, i
1/1 PM pi 1
I 1
1 1
Foldote Fresh and hard, I mit 511nor vuggy minor local solution Epithet. e rrem, ci.,:e1,-
ini med.
ar Jns e not slickensi ded or polished.
Slight on
.0 Malaise. Eine-medium gruined, dark Kral.
Diabase. Meilitim-grained, dark gray. :Massive. Sam,'
local r/011,11111111C 11,1111,.
Small p hennerYsts.
P1-211 Becomes finer-grained.
Chill zone ilif rA CI
'dt.
to li-t N - S andard penetration resistance, blnus -ft
- lAtngth recovered/length enred, "l RtOD - Length of sound core 4 in. and longer/length cored, S - Split <<poon sample ; Grountiwnter U - Undisturbed samples S - Stull/1Y lithe N - DP11131111 I, - Fixed piston It - Pitcher II-Osterberg G - G El Drilling break k - Coeffloient of
- Weathered, weathering permeability NorF;s SEABROOK STATION PUBLIC SERVICE CON1PANY OF NEV. HAMPSHIRE YANKEE ATOMIC ELEC l'IlIG COMPANY PI trilled engineers. rt,.....c...
likjr....................,....
llt,Ie,,,,,g,,s 1,, 147 I Protect 7286
',Atli 1 of I LOG OF BORING PF-2 (11.) ciF1/73,11,31'31.1.11.101131".F.10: IN,
Breakfast Hill lined BORING LOCATION Greenia_nd. New Homnshire INCLINATION 40. BEARING S50E DATE START/FINISH July 9, 1974 / July 24, 1974 CASING ID il In-CORE SIZE 2-1/11 in.
TOTAL DEPTH 271.0 ft DRILLED BY American Drilling lit Boring Co,; K. Allen GROUND EL (MSL) 4A9 n ft DEPTH TO WATER/DATE -2.1 ft / July 19, 1974 LOGGED BY Soil - K. L. Polk; Hoek - J. It, Rand EL.
MSL ft SAMPLE RATE OF' ADV.
min/ft T
WAER or RQD CONTENT PRESSURE TEST STRIKE, DIP F = Foliation
.1 =Joint C = Contact B = Bedding n)
SOIL AND ROCK DESCRIPTIONS ce 'C t4 (Weathering. defects, etc.)
(Type, texture. mineralogy, 0 x color, hardness, etc.)
Graphic 8 E L.*.,
psi Computed k
In.
- 4 cm/sec De pth ft Ty, and No.
N or Rec.
"'1 it S - slinkrnthie CONTINUED FROM PREVIOUS PAGE
- 4. et 4.4 5.0 6.4 7.5 75 6,0 3
- 6 2.6 9,0 9.5 5.0 2,0 2.6 2.1 2.0 2.5 4,9 5.9 4,7
.7260
......2711
- 111,5 7140 7150
- 7160-
-- 170
,7[90 7190 L
721 722
-7
-.723
-24
.-250
NE-I3
--NX-14 xx-is NE-16 NE-17 NE-19 NE-10 NE-20 NE-21 NE-22 4-X-23 NE-2.1 NX-25 NE-26 NX-27 NE-29 NE-29 NE-3(
NE-31 NX-32 90 93 100 Inn 62 96 34 100 90 100 100 1110 100 100 95 100 100 99 100 0
0 31 41 211 51 12 24 12 II 0
32 46 32 65 77 91 90 93 An 20' -
30" rr te 20.7 II° Ire"-
lag-
_Vogue
.11fpsSlightly wx throughout.
vo Chips Not slickensided.
Generally fresh internally.
Drilling' Some. Jewel minor rug heeler development, Joint Joints fess we and partings are not slickensided.
Chips Fairly fresh inlernally, Some minor local vug development. Not alickensitled.
Chips Fairly fresh internally.
V uggy Some minor ',Jewel' tex-striated joint lures, and powdery we Not polished effects on Mints and I Rods dropped partings. Joints are We zone V not polished.
Pyrite Slight we Slight WX
- 1 Sli ht
, if WX Chlorile
, Steep joint
- el Rough surface A Vuggy Chips Quite fresh internally.
' Minor Yuggy Some minor local nag I velure, Minor Our-face we on joints.
1 Joints not polished or vague vuy slickens idmi.
1 Chips 1
VagueFresh and hard. Sam e I Chlorite minor local vein devolopl ment. Minor surface '
W1C effects on Mints.
No polishing or Slight we sliekensides on joints.
Fresh and hetrel; drills very well. Only minor powdery we effects on joints. No evidence of movement.
1'
--J.-----" :
= *-*...
+ 1- -1
-t IJ -I-4-1-- -f-a-+-I
.. J.
- 1'.--
...,-.7-'
_ J..
4-t 1
.1-t- I
- 4. r* 1 I-.1,
4..,-..,
, Y 1 About 139,5' contact broken IMMO ir'ilirl
,nircghim It'il IY
- 1,1o.aq,,,:rn:e:gn heir'elitle:l'tiePlin:m t :itihg;ert at' ey.,
Quartzltic Quarteltic Medium grained, tearizose Becomes darker gray.
finer grained irregular]
Foliated schist, feldspathic.
Drag Folds Schist, gneissic-feldspathic as abnye.
Approximately 177.5 presume we contact. Not slickensided.
Diahase. Die rk gray, medium grained, gravelly to fine grained (Chill) at top and bottom 190,1' Fused diriltag?.leligfeis parallel lo foliation-Mara Illetaqunrtzity to meta-silt, feldspathic, fine-grained, chertY, mediun gray. locally gneissic.
Banded texture. of fine-medium light gray Grog Folds feldspathic quartzite will; dark gray, very fine grained cherty rock Banding I... comenonly
/rag Folds even to slightly nvy.
w Becomes somewhat schistose, greenish tinge (lime silirates?)
221.9 Contact broken. Not slickenside Chill Diabese, calcil ie, r
441 IF 41 d
11, ip medium grained, dark gray, scattered phenn-crysis.
Diabase, calcitic, medium grained, dark gray, massive with nc-Chill casional carbonate velnlets.
239.9 Fused contact. Dips e 59 ° II i
Al I
I I
I Fresh and hard; drills c
slickensi well. Onh* very minor powdery surface toe and partings. Not effects on some joints -7, deri.
r.,
Fresh and Ivied; drills well. Not sliekeemlelesi*
on Mints.
1
\\I Feldspathic Quartzite, fine, medium gray, somewhat felds-pathic 245.5 Gradational fused con-tact emphibolite(?),
fine grained, (lark green color. Light green Feldspathic hairline. laminate are very Irregular In tex-o calcite ture, sme yeining, Hord rock.
Breaks seisms grain, 1,1"-J2C I IVA! zones of fine iunrtz Ile grained, medium dark gray wee Mai Ie.
- no)
BOTTOM OF BORING 0Z an0 N
s N
ec -
- Standard penetration resistance, blows/ft R
Length recovered/length cored, `I*
HQ° - Length of sound core 4 in. and longer/length cored, I S - Spilt spoon sample.; Groundwater U - Undisturbed samples
- Shelby tube N - DCRISOR F-Fixed piston P - Pitcher 0- Osterberg G - GET D - Drilling break 'it - Coefficient of we - Weathered, weathering permeability NOTES SEABROOK STATIO N PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY ir wand engineers. --
Ili.l Date: August 15. 1974 Project 7285 PAGE 2 of 2 I LOG OF BORING P1"-2 GEOTECNNIEAl. ENGINEERS INC
fireakfast 11111 Ilivid INCLINATION Vertical HEARING DA FE START/FINISH July 29, 1974 / July 30, 1974 BORING LOCATION 11,-ornIstrul ?strut lip rrolahl rP CORE SIZE 2-1/9 In.
TOTAL DEPTH 10. 9 ft DRILLED BY American Drilling & Hnring Cn.; K. Allen CASING ID 3 In, GROUND EL MSL).0...g ft DEPTH TO WATER/DATE -2.4 ft,' To! v 29, 1974 LOGGED By Soil - K. I.. Polk; flock - J. II. Rand EL MR' ft SAMPLE RATE OF'
- ADV, mix/ft WATER or RQD CONTENT PRESSURE TEST STRIKE, DIP F = Foliation J =Joint C = Contact II = Bedding ts SOIL AND ROCK DESCRIPTIONS M,1 (Weathering, detente, etc.)
(Type, texture, mineralogy, 0 m color, hardness, etc.i
'- E I
Graphic EP_Ln pal Computed k
10 -1 cm/see Depth ft Type and No.
N or Rec.
.61 8
' " " " "In 9 - Sitekensid
- V
- =.-.
.-10 --
-I n,
-2 0
-30 2
11 TOP L
OF HOCK
-7.
67
70" Rusty Fairly fresh Hoorn:111v, slight WI( Joints :tril) partings hove Minor rust minor rust and powder n wx wx ects.
Sligi ffe
?,;:-.;:t Si x..... 11 tw--
ww..--...
Gneiss, medium light gra,,:'
medium coarse grained.
t ontoct 40 NX-I NX-2 93 100
.1. 0 1.1
'I S 0
/
/
/
medium f ItIll, green fn t r.11..<1 *-... i SO
^
7 11,-:
noTTON1 OF BORING 7
2-
.7 NOIC: Joints and !partings Not masmetie.
no1 snot:cm:Idol o r
- polished, 2-2_
2
-2__
5, 4.i U
N - S andart penetration restslance, blows 'ft Rec - length recovered:length cored, 't RQD - I math of sound core 4 in. and longer
- length cored, '.
0 - S1111 spoon maniple Z Groundwater II - l ndinturhed samples S - Shelby tube N - Denison F-Fixed piston It - Pitcher 0- Oaterherg G - 0151 D - Drilling break k - Coeff ie tent of wx - Weathered, weathering permeabil dr 5111)5 It II hrough -toil 0.111 11. N,,
snmples taken.
S E A BR 0 OFC STATIO N PI, BLIC SEIIVP*E COMPANY OF NEW HAMPSHIRE SAN K 1.: F. A 111911C I.: LE( MR' CO All'ANY ej inted engineers Pat,.,,,,, II, 1)171 Project 7286 PALE 1 of I I LOG OF BORING pit_ti (1) plower., u1s11 Al. P.M:1,4.1110 INt
Breakfast 11111 Ilona INCLINATION 41 REARING S5OE DA rE START/FINISH July 30, 1974 /
August A, 1974 BORING LOCATION Greenland-New Ilamoshire CASING ID 3 in, CORE SIZE 2-I/v Is. TOTAL DEPTH 204.1 ft DRILLED BY American Drilling and Boring Co.: K, Allen GROUND EL IMSLI, 121,6 ft DEPTH TO WATER/DATE -2,5 ft / July 30, 1974 LOGGED BY Snit - K. L. Polk; Rock -.1. 12, Rand EL.
MSL ft SAMPLE RATE OF ADV.
mm/it WATER or RQD CONTENT PRESSURE
. TEST STRIKE DIP F - Follatton J =Joint C = Contact B = Bedding 1.: Q SOIL AND ROCK DESCRIPTIONS ft.
,,, (Weathering, defects, etc.)
(Type, texture, m ineralogy, 0 -
0 fP, color, hardnesn etc.)
'I Graphic ir`P" psi Computed 4k 10 cmieec Depth ft Type and Nn N
or Rec.
Inn S Slick aside t
61, 0 49 9
-20 i*
n
- 20 7 VI
- 50
'- 00 0
TOP (44. nocE
- ". 8n 7.77nr
.711r 71 r."
NXI NX-2 NX-1
- Nx-4
`' N XN -7 Nx-,4
. -9
.NX-In IN-1I XX-12 NX-11 NX -11 NX 11 NX 11
- -. NX 17 NIC-Itt 99 HO 99 In n Inn 100 100
- IS 100 97 100 160 100 MI Inn 100 100 Inn 21 5.
4,3 1,2 3,0 7.0 1,5 11, 0 o.n 11 10 r'
069 29 11 n
2 1 10 01 2n (1
n 0
n AVM°
- I_
r:,
... r i:
f C
t 1
slight wx Generally freak,......,_,..._
internally. Subject Chips to slight wx on Modernly closely-atoms( Mints taints and Illirliolts to; ekensided Oner';1111isrlciiil. (`' ore Mini, vuggv s al CI140 Chios break Slight ly Internist
- vugg, Generally it it poery Slight wd wx (trivets on joints nn on:)
partings. No = I irken -
SSillitighh: wo:
A I de s nr pnlished Mints Eresh, with alight wx slight wx effects locally in)
Chita-Ile InInts, some smal1 Slight too yoga in diabase where phomervms, ilis,nlve ll.
sligh t
wx NW slickens1,1,1nr 1.11shetl.
Vnon.
(111 1 4.
1'14,11.1111 1111,1 int vr -
Vow.
milk'. RIO, 1.0sik Chips In 111' lilinlion, mal,inm for
'O. 11011. ParlIna,,u 1
.41Ig-hl so:
Vogel' ininIs ;Ire no!..liel:en-shied or pn11.411,,,I,
)inbase Pegmatite Gneiss, quartvitie.
Komewhat inntlied Iiithl
)inhase in medium ern,, line-grained rack. I nita II:
tar'grnv recnish ce iin !lime
- 12.-
Alilelit(41.
martzile
,...(-.
11 10-1-,, hit*.
InenlIN 1,0101,,I. Ih*
100111 some, hai xchis i; e
al ham..
net I,
- II cnntact. (.11111 ZMU.
rArBr Nil t=:ll.
--"..Lt.' V
- tt
-":"7-7.
v-i,-,, t--j_
I- + a-
+ - 4
, + i-I..
' It 4
VPIr IIII IfIllIalIV linlinnit:tnitAlii'i'lmilit.'tit-litigneiiiil.' line Phenocrexix wx, yuggy; rock is not ea leitie.
Bock Is matt-tulle.
1111.3' Fused itontael. GhIll pine.
I 444.1 t I/Inhwie (Gahl,ro, ;.
Oark graV, M1'11111111 -
crorir grainml, ntoill,41 Iexture. Mo.:meth., non IlArt4 V41111104, Ulla
-LLY-a__1.
,.4L, 111.*
QuartvItle imeiss, think.
Thin banded, greenish lilt.'
I cab-silicate rockl.
quarli yinc-gl.ained. Ilandine handing norepl in hide 0" 5 lilt In 557W. locally game-what yuggy, n4
(.4 (7
N - Standard penetration resistance, blown/ft Bee - Length recovered/length cored, 1 RQD - Length of mound core 4 in, and longer/length cored, 7 s
- Spilt spoon sample;., Groundwater U - Undisturbed samples S - Shelby tube N - Deninon F-Fixed pinton P - Pitcher 0- Osterberg G - GM
- Drilling break k - Coefficient of wx - Weathered, weathering permeability NO r ES
- 1) Wnshmi through soil 0-q0 (I, no samples taken.
2)
No drill times aval table.
SEABROOK STATION PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE YANKEE ATOMIC ELECTRIC COMPANY U Med engine=.,--
Dal, Motu's! Pi 1974 Project 7286 PAGE 1 of 2
1,00 OF BORING pF-3.A (12) OMITEr11 44 14 Al. F:N01,11:4411.44 41w
Breakfast 111 lined' BORING LOCATION ci,.....1.ed 11 NIF71*7 iliampahlrf. INCLINATION 11° BEARING 950E DATE START/FINISH Alb,' 30, 1974 / Augnst 8, 197.1 CASING ID :1 to CORE SIZE...1,r, i, TOTAL DEPTH 201,3 ft DRILLED IW American Drilling and Boring Co, t K. Allen GROUND EL MSL) tni,s ft DEPTH TO WATER/DATE -2 3 It /.1cly 30, 1974 WOOED ITV Soli - K. I., Polk; Rock -.1, II, Hand EL, MSL ft SAMPLE RATE OF ADV.
min/ft WATER or RQD CONTENT
-- PRESSURE TEST sTR IKE, DIP F = Foliation j. Joint C = Contact B = Redding S011. AND ROCK DESCRIPTIONS tn X il (Weathering, defects, 0 t, I (Type, texture, mineralogy, 0,g color, hardness, etc.1 C tn Depth ft Type a.nd No.
N or Rec.
3 Grnphic LEM psi Computed
,k 10- 'bm /sec 7 I / f 7 7 7 7..
C lin 9= Sliekenside CONTINUED FROM PREVIOUS PAGE 80 100 129 1111 715
-1 nn t'_
717 7
- 7180_,
7 7-Inn-7200-NX-15 NX.26
..1',.'X-21 NN-22
- NX -21 N1X-24
- 27
-27, NrX-26' NX-27 NA 2.
NX-29 NX-30 NX - 11 Ion 100 100 IA0 Inn 100 97 100 97 100 lox 100 100 H.4 9.8 MA 1.0 13.0 4, a 7,8 5,4 9.2 3.9
- n. o 4.9 10, 9 0
A crystals 1.,
'3
-1
.4 "iligh7 77,7 effects ra Mr fresh Internally lad subject locally to
,,,,,,,,,,,, slight to moderate ox, wog development.
Joints and partings ronmet broken A mphibolite I') Dark green, similar to 21:1.5' Feldspathic in PP-S. Fine-grained, locally foliated or sanded rock. Local fl`ldspathic Feldspathic gneiss.. Bands arc transitional with amphi-Feldspathic bottle. Rock is not mametic.
Feldspathic Amphibolite. dark green, fine-grained. local Iv fine light green teinleis Quartritic of gray feldspathic or tinartzil ie gneiss.
Dark green Gneiss, alternating itiartritic lavers ol' greenish mmetaltic gneiss and gra, Dark green evenly layered quartritic GradationaI gneiss.
contacts. Dark green Dnrk green Even bolite. No) magnetic.
Haim gneiss ly 0 turthfint-rock, looks like amphi-Feldspathic gneiss, pink feldspars. Strongh magnetic.
Ille tutr14ite Ili,.,lerlae I il t'n ed 20 A
grAl A
ammonium
- -="--
in x A
-ittlY.
irx _,
x - '.
n A 20 43 r
I
=.,
1 0
- 3 a
1 i
1
[
L Moderate ox no) slickensIded.
Pyrite Slight wx Fairly fresh. soldeet effects to slight N1, effects.
are nnt silekensided or polished.
Chips Fresh and hard. leen Vuggv minnr sex effects.
.JoInts are planar rind Crystal urowths are not sliekensidcd or polished, Minor yuggv Shows so me internal fol ding.
Minor I'ItgrI' Fresh, Joints and partings a, not is.11icikzitie fst d or
%A 22 FirA 3fi
.12 FA VII n prA 49 (12
- Fil, I,
/
^
- 2 0 1 BOTTON1 CIF BORING Note: Contnins 1005-nettle concentrations 2011. 11' to 2111,1%
Strongly magnetic, COO roe feldspathic
- gneiss, az t.3 0
N - Sta ength ndar, penetration rentstrinee, blows 'ft Re, - l recoyeredlength cored, 1 RQD - length of sound core 4 in, and longer/length eared, 1 S - Split spoon sample ;. Groundwater LI - Undisturbed samplea 0 - Shelby tube N - Dentann F-Fixed piston P - Pitcher 0- Outerberg (1-GET D - Drilling break k - Coefficient nf wow-Wenthered, weathering permeability NO rEs SEABROOK STATIO N Pltlit 9, SERVICE CoKIPANY (IF NEIA HAMPSHIRE YANKF1 A 111MIC ELF(' rim: compANr a tilted engineers, -,,,,.... *.
Dam: \\ uleu 1.-,, loll Prolect 7266 II71.1 t, of,
I LOG DE' 1141121N(, II tirOT.1177711'Al. 1,101.774.1-304 INI
ATTACHMENT NO. 3 PETROGRAPHY AND PRELIMINARY INTERPRETATION OF THREE SAMPLES OF DRILL CORE FROM THE PORTSMOUTH FAULT GREENLAND, NEW HAMPSHIRE Gene Simmons Dorothy A. Richter MASSACHUSETTS INSTITUTE OF TECHNOLOGY CAMBRIDGE, MASSACHUSETTS for WESTON GEOPHYSICAL RESEARCH, INC.
WESTBORO, MASSACHUSETTS
PETROGRAPHY AND PRELIMINARY INTERPRETATION OF THREE SAMPLES OF DRILL CORE FROM THE PORTSMOUTH FAULT, GREENLAND, NEW HAMPSHIRE Weston Geophysical Research, Inc.
Post Office Box 306 Weston, Massachusetts 02193 Gene Simmons Dorothy Richter 26 August 1974
SUMMARY
In this report we describe three samples of drill core from the vicinity of the alleaed Portsmouth fault near Green-land, New Hampshire. The three samples are metamorphic rocks.
The pronounced laminations in sample PF-2A appear to be of primary depositional origin rather than of tectonic origin.
The peculiar arcuate structures common to both samples PF-2A and PF-2C are reminiscent of glass shards, which suggests that the rocks are totally recrystallized meta-tuffs or reworked volcanic detritus of different compositions. Sample PF-2B is a partially recrystallized basalt which is probably younger than the other two samples. All three samples lack substantial preferred orientation of their minerals. Evidence for dynamic structural deformation, either recent or ancient, is entirely absent. In summary, we find no petrographic evidence that these three samples are associated with a fault. If a fault does exist in the region from which these samples were obtained, then either its deformation was not so pervasive as to affect these three samples, or else the deformation occurred before metamorphism and all petrographic evidence has been erased by the last metamorphic event.
PETROGRAPHY OF SAMPLE PF-2A 99.5-99.9' Name: Felsic metatuff Macroscopic Description This sample is a finely laminated schist. It is light grey in color and fine grained. Layers of alternating light and dark colors are probably due to segregation of mineral phases. Euhedral crystals of pyrite (- 1/2 mm) are abundant. The texture is punctuated by light col-ored augen and irregular 0.5 mm pores. This 5 inch core shows no veins, folds, and only a few large cracks.
Microscopic Description Texture The average grain size is less than 0.05 mm. Lamina-tions are the Product of the effect of variations in grain size fi in the proportions - of quartz to mica, and the abundance of opaques. Micas tend to show a pre-ferred orientation of flakes at an angle of about 60 0
to the laminae. Most of the veinlet-like seams of quartz follow the foliation; although a few seams cross-cut the foliation they are not common and their margins have recrystallized to blend with the rest of the rock.
The augen are pods of fine grained quartz. Some of the pores have minor amounts of weathering products around the rims.
A few large microcracKs that are now completely healed were observed in the thin section. They are marked by chlorite, quartz, and trains of discrete grains of opaques (probably pyrite). However, there is no other textural evidence of penetrative deformation.
The thin laminations and indications of flow structures imply that this sample is a recrystallized silicious tuff or reworked volcanic detritus.
Mineralogy Quartz is the most abundant mineral in the thin section.
It occurs in very fine (0.01-0.1 mm) anhedral aggre-gates. The individual crystals appear strained and have sutured grain boundaries. Coarser grained quartz occurs in thin seams and pods which are generally parallel to the layering.
Muscovite occurs as small flakes between quartz grains.
It commonly shows a preferred orientation at about 60 0 to the layering. Muscovite rarely occurs in multigranular aggregates.
Chlorite occurs scattered through the matrix, in minor amounts in thin seams both with and without quartz, and in a few of the darker laminae in the sample. It is pale green, fibrous, and exhibits blue and brown inter-ference colors.
Opaque grains occur in thin, discontinuous layers in the sample. Some seem to be dendrites parallel to the layers, and others are small nodules. Many crystals can be seen in. hand specimens to occur as well formed
-4° cubes.
Calcite and sphene occur in accessory amounts in some of the layers.
Estimated Modal Composition quartz 60%
muscovite 15%
chlorite 15%
others 10%
10 0%
PETROGRAPHY OF SAMPLE PF-2B 136-136.5' Name: Metabasalt Macroscopic Description This massive dark grey sample has a fine grained, uniform, phaneritic texture. Felty plagioclase crystals (1-2 mm size) set in a dark groundmass are easily recognized with a hand lens. The plagioclase (Hardness 6) is evidently quite altered since it is readily pulverized by probing with a knife point (Hardness 5.5). In the black ground-mass biotite flakes are large enough to be seen. Pyrite is present as widely dispersed anhedral grains. There are no veins or major cracks visible in the core. A few open pores are present.
Microscopic Description Texture The thin section displays a primary intersertal texture which is partially masked by secondary minerals.
Plagioclase laths (0.5 mm) form a mat with ferro-magnesian and secondary minerals filling the inter-stices. Cleavage cracks are not abundant. There is no evidence of healed cracks, no veinlets, and no other signs of structural disruption. Even the larger feld-spar crystals are remarkably free of all types of micro-cracks.
The absence of deformation structures in this rock in-dicates that no significant non-hydrostatic stress has existed after the last metamorphic event. Hence, if a fault is present in the vicinity of this rock, stresses, if any, have been small since the time of last meta-morphism of the rock.
Mineralogy Plagioclase originally composed about 40% of the rock. It is now very highly altered to sericitic products. Most of the lath-like crystals have a turbid appearance, and are uniform 0.5 mm. There are a very few larger crystals which are now sericitized.
Clinopyroxene (probably augite) occurs as abundant round-ish grains 0.1 - 0.3 mm in diameter. The crystals have poor cleavage and weak zonation. The clinopyroxene is interpreted to be relict in this biotite grade meta-morphic assemblage.
Opaque grains are relatively abundant in thin section.
They commonly have square outlines, and occur in clumps with pyroxene and biotite.
Biotite occurs as subhedral crystals in the matrix. Basal sections are reddish brown while other orientations are pleochroic from yellowish brown to dark brown. The biotite is probably metamorphic in origin.
Chlorite is a common mineral in the matrix of this rock.
It is pale green and fibrous. There are a few ovoid mats of chlorite about 1 mm in diameter which may represent replaced olivine crystals.
Apatite is an accessory mineral in this sample. Euhedral crystals are minute but common.
Actinolite needles are dispersed through the section.
Incipient blue green actinolite also seems to be present in some chlorite mats.
Minor amounts of sphene and hematite are also present in the rock.
Estimated Modal Composition plagioclase 40%
(plagioclase
+ sericite) clinopyroxene 15%
opaque 10%
biotite 15%
chlorite 15%
apatite and 5%
accessories 100%
PETROGRAPHY OF SAMPLE PF-2C 262.0-262.4' Name: Fine Grained Amphibolite Macroscopic Description This specimen is a very fine grained dark green rock.
The individual minerals are too small to identify with a hand lens. The rock is massive and non-foliated. It is cut by a weblike network of calcite and quartz veinlets.
Small clots of pyrite are visible.
Microscopic Description Texture The sample displays a complex texture in thin section.
The average grain size is about 50 microns. There is no preferred orientation or systematic foliation although the constituent minerals are metamorphic.
There is a vague layering to the rock marked by arcuate clumps and thin layers of epidote and calcite.
Calcite-quartz veins which randomly crosscut the rock are partially recrystallized.
Mineralogy Amphibole (probably hornblende) and chlorite, in about equal proportions, are in the sample. The amphibole occurs as brownish green stubby, poorly formed crystals finely mixed with chlorite. The crystals are pleochroic from pale green to brownish green. There is no apparent preferred orientation of the grains.
Chlorite is also a major phase in the rock. It is generally pale bluish green and forms both platy mats and stringy aggregates.
Epidote occurs as minute granular crystals clustered in veins, in arcuate clumps, and scattered through the matrix.
Quartz forms spongy crystals in the matrix barely re-solvable at high magnification, and clear 0.1 mm crystals in veins.
Sphene is widely distributed as nodular aggregates and a few 0.1 mm subhedral crystals.
Apatite is present as accessory crystals.
Calcite is common in fine grained veins and in lesser amounts in the matrix.
Opaque grains are usually associated with veins and are not common in the matrix.
Estimated Modal Composition amphibole 25%
chlorite 25%
epidote 20%
quartz 20%
calcite 5%
opaque sphene &
5%
apatite 100%
Photo 1. Sample PF-2A 99.5-99.9'. Felsic metatuff. Plane polarized light. Width of field 1.5 mm. The photo-micrograph shows the fine grained nature of the sam-ple. Roundish white spots are quartz which are ob-scured by muscovite and chlorite. The thin discon-tinuous laminae are composed of sphene, calcite, iron oxides, and chlorite. (The black circles are bubbles in the epoxy.)
Photo 2. Sample PF-2A 99.5-99.9'.
Felsic metatuff. Plane polarized light. Width of field 0.5 mm.
This photomicrograph is an en-larged view of the matrix and shows one of the few quartz vein-lets which crosscuts the laminae.
The thin, discontinuous laminae are composed of *phene, calcite, iron oxides, and chlorite. In this view, the dark laminae are almost opaque because the indi-vidual grains are only about 1-2p.
Photo 3. Sample PF-2B 136-136.5'. Metabasalt. Plane polarized light. Width of field 1.5 mm. This photo-micrograph shows the typical textures observed in this sample. The light grey dusty looking background is altered plagioclase. Ovoid darker grains are relict clinopyroxene. Note the abundance of black grains; they are both opaque miner-als and iron-rich biotite.
See photo 4 for the details of the fabric.
Photo 4. Sample PF-2B 136-136.5'.
Metabasalt. Plane polarized light. Width of field 0.5 mm.
This photomicrograph shows the typical details of the fabric.
Note how pervasively altered the plagioclase is. Note also the hexagonal biotite plates; the euhedral form implies that the biotite is metamorphic.
Photo 5. Sample PF-2C 262-262.4'. Fine grained amphi-bolite. Plane polarized light. Width of field 1.5 mm. This photomicrograph
.shows a typical view of this sample. The fine light and medium grey crystals are in-tergrown amphibole and chlorite; the white grains are quartz; and the darkest aggre-gates are clusters of epidote-calcite-sphene. Note the abundant arcuate quartz and epidote shapes; these are all polygranular.
Photo 6. Sample PF-2C 262-262.4'.
Fine grained amphibolite. Plane polarized light. Width of field 0.5 mm. This photomicrograph shows the intimate amphibole-chlorite intergrowths, and a granu-lar epidote-sphene seam which arches across the field of view.
ATTACHMENT NO. 4 K-Ar AGE DETERMINATIONS OF SEVEN SAMPLES RELATED TO THE INFERRED PORTSMOUTH FAULT GEOCHRON LABORATORIES DIVISION KRUEGER ENTERPRISES, INC.
CAMBRIDGE, MASSACHUSETTS for WESTON GEOPHYSICAL RESEARCH, INC.
WESTBORO, MASSACHUSETTS
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MASSACHUSETTS 02139 * (617) 876-3691 20 August 1974 Richard J. Holt Weston Geophysical Res. Inc.
P.O. Box 550 Westboro, MA 01581
Dear Mr. Holt:
Enclosed are the analytical reports Mr. Rand requested
- They are B-1236, B-1237 and B-1238 which were submitted for analyses on 20 January 1969.
Please forward these reports to Mr. Rand and if we can assistance, please do not hesitate to contact us.
Sincerely, be of any further Derreth McStowe Office Manager SPECIALISTS IN GEOCHRONOLOGY & ISOTOPE GEOLOGY
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION OW ft, 24 BLACKSTONE STREET
- CAMBRIDGE. MA 07139 * (617)- C6-3491 POTASSIUM -ARGON AGE DE TERPANA REPORT OF ANALYTICAL WORK Our Sample No. B - 1236 Your
Reference:
B2 129.5 Submitted by:
Ed Levine Weston Geophysical Research Inc.
P.O. Box 364 Weston, MA Date Received:20 January 1969 Date Reported:31 January 1969 Sample Description & Locality:
Newburyport quartz diorite, biotite-bearing phase, drill core B2, Seabrook, N.H.
Material Analyzed:
Biotite concentrate, -20/+100 mesh Ar 4 "/K 4° =
0.0186 AGE= 294 (+ 9)x 10 6yrf.
Argon Analyses:
Ar 4 0 *, ppm.
0.1431 0.1432 Potassium Analyses:
% K 6.295 6.316 Constants Used:
Xt3= 4.72 x 10 10 / year Xe = 0.585 x 10 -1° / year K 4° /K - 1.22 x 10 -4 gig.
Ar 40 */ Total Ar 40 0.950 0.953 Ave*. Ar 4°*, ppm.
0.1432 Ave %K K 4 ", ppm 6.30(
7.693 1
AGE =
- e
- Ar K40 Note: Ar 40 '1' refers to radiogenic At ".
M.Y. refers to millions of years.
24 Blackstone Street, Cembriike, Maw dtist-
, Telephom.Tliewbridg*I*91 REPORT OF ANALYTICAL MK POTASSIUM-ARGON AGE DETERMINATION Our Sample No.
Your
Reference:
Submitted by:
D 12317 MK 031 Nr. U. Smelme Vemtem P. 00 DrIr14.1 astern, MSS.
- Imeeerek, Date Receivad: 110 ilemouzy IWO Date Reported: j11 ameary 490 Sample Description & Locality:
1114abitio.4tit meteoottaeat of the Nerritemek Grew, Will Came BB At 93% eksibrooks Material Analyzed:
Dietits eemeemtrote, 4/00 meek. Ile Maths me too flee grained to he completely free grams, theestere, a emoseetrate at the moot biotite-rich grace eve M. Estimated 10-00%,bisalte.
040230 AGE. leik (tP) la 106 years.
Argon Analyses:
Ar 4 ",pom.
0.8483 0.083 Potassium Analyses:
% K Ar 40 */ Total Ar 40 0.892 0.697 Ave. %K 2.486 Ave. Ar 4"*, pprn.
0.0483 K 4", ppm 3.033 2.02 Constants Used:
= 4.72x 10 - "/ year xe = 0.585 x 10 -1° / year K 40 /K = 1.22x 10 -4 g./g.
Note: Ar 4°
- refers An radicivnic A 1
In [X15 X e x Af4" AGE=
t 1 x+ ke K 4° Ar 40 a/K 40 =
ata P. O* lis "babes Owarsel.
Labs Orsiles.
Our Sample No. 11,4234 Your
Reference:
alp laze Submitted by:
24 Blackstone Street -, Cambridge, Mass. 02139 Telephone TRowbridge 6-3691 REPORT OF ANALYTICAL WORK POTASSIUM-ARGON AGE DETERMINATION Date Received:_ Soma-7 100 Date Reportedu anonagr Sample Description & Locality: liotite phase of Nereburyport Qeerts diorite. Drill ewe
- 19. Beebrodk, NA. Coarse.imained diorite in iumeme mutest mak dark. jime.greined rock, Material Analyzed: 11.14168 eissemireikao, -40/41100:06114, Mew asense Lamas *re.
/reek tdeditte. 7,0 9 Ohlerite. 20; deplibele. 10%.
Ar 4° */K " = 0.0179 AGE= 1 (119) ig 186 jeers.
Argon Analyses:
Ar ", ppm.
Ar"*/ Total Ar 4" Ave. Ar °"*, ppm.
0.0854 0.915 0.09ohe 0.0837 4.917 0.0860 Cr gee sample - mei used is am seloulskima).
Potassium Analyses:
% K Ave. %K 3.998 3.933 3.068 K 40, ppm 4.798 Constants Used:
= 4.72 x 10 '°/ year Xe = 0.585 x 10 -1 0 / year K "/K 1.22x 10 4 g./g.
Xe Ar4"
.,1
- Xe 10° J
AGE-1 In Note: Ar "* refers to radiogenic Ar 4 '.
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MASSACHUSETTS 02139 * (617) 876.3691 19 August 1974 Richard J. Holt Weston Geophysical Res. Inc.
P.O. Box 550 Westboro, MA 01581
Dear Mr. Holt:
Enclosed are the analytical reports of the K-Ar age determinations on the seven (7) rock samples described in John Rand's letter of 18 July 1974.
These samples were a little difficult to work with because of the type of materials, however we did the best we could with them. The measured K-Ar ages are about what I would expect for these rocks.
I will be away for a few days, but Hal Krueger will be here. I have dis-cussed these results with him, and he is quite familiar with the geology of the area in question and with the work we did for you in this area several years ago. He will be happy to discuss these results with you in greater detail if you care to give him a call.
In the meantime, I am enclosing our invoice for this work. We look forward to serving you again in the near future.
Sincerely, Richard H. Reesman General Manager A.a 401 RHR/dm nelc: 7 reports & invoice #4473 cc: J.R. Rand (letter)
SPECIALISTS IN GEOCHRONOLOGY & ISOTOPE GEOLOGY
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA, 02139 * (617)- 816 - 3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
Your
Reference:
Submitted by:
B-2882 PF - Si Richard J. Holt Weston Geophysical Res., Inc.
P.O. Box 550 Westboro, MA 01581 Date Received: 22 July 1974 Date Reported: 16 August 1974 Sample Description & Locality: Kittery quartzite Towle Road, Hampton-Exeter Expressway Hampton, New Hampshire Material Analyzed: Chloritized biotite concentrate, -80/+200 mesh.
Ar 4 0 */K 40
.01687 AGE=
268+/- 10 Argon Analyses:
Ar 4° *, ppm.
Ar 413*/ Total Ar Ave. Ar 4° *, ppm.
.06717
.834
.06653
.06588
.862 Potassium Analyses:
% K Ave. %K K 4°, ppm 3.224 3.233 3.944 3.242 Constants Used:
4.72x 10' ° / year AGE
1 X+
Ar 40
- 1 x
+ X0 Xe K4° Xe = 0.585 x 10 -I° / year K 4° /K = 1.22 x 10 g./g.
Note: Ar 40* refers to radiogenic Ar 40.
MY. refers to millions of years.
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA, 02139 * (617)-86-3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
A-2883 Your
Reference:
PF - S2 Submitted by: Richard J. Holt Weston Geophysical Res., Inc.
P.O. Box 550 Westboro, MA 01581 Date Received:
22 July 1974 Date Reported:
16 August 1974 Sample Description & Locality:
Rye fm. feldspathic quartzite Winnicut Road, Route 151 North Hampton, New Hampshire Material Analyzed:
Amphibole concentrate, -80/+.200 mesh. Estimated composition:
95% gray-black amphibole, 5% adhering groundmass.
Ar "*/K" =.01960 AGE=
308 -I-14 M.Y.
Argon Analyses:
Ar"*,ppm.
Ar40*/ Total Ar 4° Ave. Ar 4°*, ppm.
.01794
.674
.01773
.01752
.668 Potassium Analyses:
%K Ave. %K K 4 0, ppm
.752
.741
.904
.731 Constants Used:
X0 = 4.72x 10 -"/ year Xe = 0.585 x 10 0 / year K "/K = 1.22 x 10 -4 gig.
Note: Ar 4°* refers to radiogenic Ar 4°.
M.Y. refers to millions of years.
1 AGE -
In [X0 Xe Ar40* + 11 Xe +
K4°
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION mnr-rina 24 BLACKSTONE STREET
- CAMBRIDGE, MA 02139 * (617)- V6-3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
m-2884 Your
Reference:
PF - S3 Submitted by:
Richard J. Holt Weston Geophysical Research Inc.
P.O. Box 550 Westboro, MA 01581 Date Received: 22 July 1974 Date Reported: 16 August 1974 Sample Description & Locality:
Rye fin. feldspathic gneiss Route 1 Bypass, Lafayette Road Portsmouth, New Hampshire Material Analyzed:
Muscovite concentrate, -801+200 mesh. Estimated composition:
902 msucovite, 52 biotite, 52 quartz and feldspar.
Ar "*/K " =.01864 AGE=
294 + 10 M.Y.
Argon Analyses:
Ar 4 "*, ppm.
Ar 4"*/ Total Ar "
Ave. Ar "*, ppm.
.1522
.852
.1500
.1478
.782 Potassium Analyses:
%K Ave. %K K 40 ppm 6.563 6.597 8.048 6.631 Constants Used:
Xp = 472 x 10 10 / year Xe = 0.585 x 10 -1 °/ year K 40/.-
1.22 x 10 -4 g./g.
Note: Ar 40
- refers to radiogenic Ar ".
M.Y. refers to millions of years.
Xii Xe x Ar" Xe K 4>
+ 1]
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA. 02139 * (617)- 8.76-3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
M-2885 Date Received:
22 July 1974 Your
Reference:
PF - S4 Date Reported: 16 August 1974 Submitted by:
Richard J. Holt Weston Geophysical Res., Inc.
P.O. Box 550 Westboro, MA 01581 Sample Description & Locality:
Rye fm. feldspathic quartzite Route I Bypass, Greenleaf Road Portsmouth, New Hampshire Material Analyzed: Concentrate of fine-grained mica-quartz aggregates, -80/+200 mesh.
.01645 AGE
262 + 11 M.Y.
Argon Analyses:
Ar 4 °*, ppm.
Ar 40 */ Total Ar "
Ave. Ar 40*, ppm.
.02042
.625
.02046
.02049
.645 Potassium Analyses:
%K Ave. %K 1.015 1.019 1.023 K ", ppm 1.243 Constants Used:
Xe3 = 4.72 x 10' ° / year Xe = 0.585 x 10 -10 / year K 40/( = 1.22 x 10 -4 g./g.
Note: Ar 4°* refers to radiogenic Ar 4 ".
M.Y. refers to millions of years.
1 AGE = In [
K Xti Xe Ar4"
+ X Xe
+ 1
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA, 02139 * (617)- 8J6-3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
A-2886 Your
Reference:
SRP - Si Submitted by:
Richard J. Holt Weston Geophysical Res., Inc.
P.O. Box 550 Westboro, MA 01581 Date Received:
22 July 1974 Date Reported: 16 August 1974 Sample Description & Locality:
Diorite Scotland Road, Interstate 95 Newbury, Massachusetts Material Analyzed:
Amphibole concentrate, -801+200 mesh. Estimated composition:
85% amphibole, 10% biotite, 5% chlorite.
Ar 4° 'VI( 4° =.02764 AGE=
422 + 17 Argon Analyses:
Ar 4 *, ppm.
Ar"*/ Total Ar Ave. Ar 40 *, ppm.
.03714
.807
.03892
.04070
.389 Potassium Analyses:
0/0 K 1.154 1.154 Constants Used:
X0 = 4.72x 10' ° / year Xe = 0.585 x 10 -1° / year K 4° /K = 1.22 x 10 -4 gig.
Note: Ar 40* refers to radiogenic Ar 4°.
MN. refers to millions of years.
Ave. %K K 4°, ppm 1.154 1.407 AGE=
1 In [xo 4 Xe Ar 4 °* + 1 Xe
+
Xe K 4°
\\
1,INRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA. 02139 * (617)- 876-3691 POTASSIUM-ARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No. A-2887 Your
Reference:
SRF - S2 Submitted by:
Richard J. Holt Weston Geophysical Res., Inc.
P.O. Box 550 Westboro, MA 01581 Date Received: 22 July 1974 Date Reported: 16 August 1974 Sample Description & Locality:
Schist Highfield Road, Abandoned RR grade Newbury, Massachusetts Material Analyzed:
Chlorite - amphibole concentrate, -80/+200 mesh. Estimated composition: 40% amphibole, 60% chlorite.
Ar "*/K 4° =.01932 AGE=
304 + 15 M.Y.
Argon Analyses:
Ar 40 *, ppm.
Ar 40 */ Total Ar 40 Ave. Ar 40 *, ppm.
.01162
.381
.01149
.01136
.548 Potassium Analyses:
% K Ave. %K K 40, ppm
.492
.487
.594
.483 Constants Used:
4 = 4.72 x 10 -'°/ year Xe = 0.585 x 10 -1° / year K 40 1K = 1.22 x 10 -4 9.1g.
Note: Ar 4°
- refers to radiogenic Ar 4 °.
M.Y. refers to millions of years.
1 AGE - xe +
In [X0 +xe X e x Ar 4 °*
K"
KRUEGER ENTERPRISES, INC.
GEOCHRON LABORATORIES DIVISION 24 BLACKSTONE STREET
- CAMBRIDGE, MA. 02139 * (617)- V6-3691 POTASSIUMARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No.
B-2888 Your
Reference:
SRF - S3 Submitted by:
Richard J. Holt Weston Geophysical Res., Inc.
P.O. Box 550 Westboro, MA 01581 Date Received: 22 July 1974 Data Reported: 16 August 1974 Material Analyzed:
Newburyport granodiorite Parker Street, Little River area Newburyport, Massachusetts Chlorite-biotite concentrate, -80/+200 mesh. Estimated composition: 70% chloritized biotite, 30% quartz.
Sample Description & Locality:
Ar 4° */1( =.01860 AGE=
294 +/- 20 M.Y.
Argon Analyses:
Ar 4° *,ppm.
Ar 40 */ Total Ar 40 Ave. Ar 40 *, ppm.
.005765
.325
.005548
.005330
.370 Potassium Analyses:
%K Ave.701(
K 40 ppm
.245
.244
.298
.244 Constants Used:
XjS = 4.72 x 10 -10 / year Xe = 0.585 x 10 -1° / year K"/K =1.22 x 10 -4 g./g.
Note: Ar 40* refers to radiogenic Ar M.Y. refers to millions of years.
1 AGE - xe + x In [
xe A0 + Xe Ar40* + 1 0
K4°