Leg : 77 Top/Bottom Interval(mm): 0/ 50 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 268.55
Core: 30 Top of Core Depth (m) : 268.50
Sect: 1 Top of Section Depth(m): 268.50
LITHOLOGY: SEDIMENT;
LIMESTONE;
Piece No. : PCE 1 (1-4);
Leg : 77 Top/Bottom Interval(mm): 50/1500 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 270.00
Core: 30 Top of Core Depth (m) : 268.50
Sect: 1 Top of Section Depth(m): 268.55
LITHOLOGY: GNEISS;
METAMORPHIC ROCK;
Piece No. : PCES 2 (11-14), 3 (17-23), 4 (25-98), 5 (100-103),
6 (107-140), 7 (144-149);
Comments : PCE 2 IS COMPRISED OF DARK-COLORED GNEISSOSE
FRAGMENTS IN A CALCITE-CEMENTED BRECCIA(FIZZES
STRONGLY WITH HCL) WITH MAXIMUM SIZE OF CLASTS
5X10MM & SHOWING STRONG YELLOWISH ALTERATION ON
OUTER SURFACE,PCE 2 ALSO HAS A CHALKY SURFACE
CONTACT WITH PCE 1,PCE 3 IS MADE UP OF PEBBLES OF
VARIABLY WEATHERED(FELDSPATHIC?) GNEISS WITH DARK
MATRIX(PROBABLY MICARICIN-PORPHYROBLASTS WHICH ARE
WHITE OR PINKISH OR GREENISH & SHOW LITTLE
PREFERRED ORIENTATION) & SOME PCES STILL HAVE
CALCITIC CEMENTED BRECCIA,PCES 4-7 GNEISS WITH DARK
BIOT MATRIX WITH GREENISH & PINK PORPHYROBLASTS(QTZ
& FELD?) ORIENTATION WELL PRONOUNCED IN PARTS WITH
THIN RED LINED FRACTURES PARALLEL TO THIS DIRECTION
& BREAK TO SHOW A RUSTY WEATHERING SURFACE,FABRIC OF
PCES 4-7 IS STEEPLY DIPPING(70 DEGREES) & PINK FELD
RANGE TO 6X8MM(ALKALI FELD),PCE 6 HAS A CALCITE/QTZ
VEIN IN INTERVAL 106-116CM;
Leg : 77 Top/Bottom Interval(mm): 0/1250 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 271.25
Core: 30 Top of Core Depth (m) : 268.50
Sect: 2 Top of Section Depth(m): 270.00
LITHOLOGY: GNEISS;
METAMORPHIC ROCK;
Piece No. : PCES 1 (0-7), 2 (10-14), 3 (17-35), 4 (38-46),
5 (48-77), 6 (79-94), 7 (96-125);
Comments : PCES 1-5 ARE SCHISTOSE QUARTZO-FELDSPATHIC GNEISS
CONTAINING WHITE QTZ & WHITE/GREENISH/PINK FELD
PORPHYROBLASTS(TO 8X5MM) & COMMON REDDISH WEATHERED
SHEAR PLANES APPEAR AS RED VEINS AS IN CORE 30-1 &
THE FABRIC HAS HIGH ANGLE DIP(70 DEGREES),PCES 6-7
ARE THE SAME AS PCES 1-5 EXCEPT SMALLER FRAGMENTS &
MORE HIGHLY WEATHERED,PCE 7 CONTAINS COMMON PINKISH
TO WHITE(VEIN?) CALCITE/QTZ FRAGMENTS PLUS GREENISH
WEATHERING OF FELD(& MICAS?);
Leg : 77 Top/Bottom Interval(mm): 0/1500 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 279.50
Core: 31 Top of Core Depth (m) : 278.00
Sect: 1 Top of Section Depth(m): 278.00
LITHOLOGY: DIABASE;
Piece No. : PCES 1 (0-6), 2 (8-59), 3 (61-74), 4 (76-83),
5 (86-105), 6 (108-120);
Texture : VERY FINE-GRAINED TO APHYRIC DIABASE,PCES 4-6 HAVE
SOAPY FEEL & SCRATCHED EASILY WITH FINGERNAIL
(WEATHERED SERP?);
Structure : CALCITE VEINS COMMON,PCE 2 HIGHLY FRACTURED,PCES 4-6
ARE HIGHLY FRACTURED WITH SOME WELL-DEVELOPED
SLICKENSIDES;
Alteration : RUSTY-BROWN CONCENTRIC ALTERATION OCCURS AT
15-30CM INTERVAL,DIABASE ALTERED DOWNCORE TO DARK
GREEN CLAY.MIN,WHITE FELD XTLS PARTLY ALTERED TO
GREEN CLAY.MIN OCCUR SPORADICALLY;
Comments : PCES 1+3+6 MADE UP OF SEVERAL SMALL FRAGMENTS,PCE 2
IS MADE UP OF SEVERAL LARGE PCES & A FEW FRAGMENTS,
DARK GREEN DIABASE;
Phenocrysts: FELDSPAR
Size(mm): TO 2
WHITE FELD XTLS PARTIALLY ALTERED TO GREEN
CLAY.MIN OCCUR SPORADICALLY;
Replacement: CALCITE
VEINS;
CLAY MINERALS
Minerals Replaced: DIABASE,FELD
GREEN TO DARK GREEN CLAY.MIN REPLACING DIABASE &
FELD XTLS;
SERPENTINITE
ID SERP UNCERTAIN;
Leg : 77 Top/Bottom Interval(mm): 1080/1500 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 279.50
Core: 31 Top of Core Depth (m) : 278.00
Sect: 1 Top of Section Depth(m): 279.08
LITHOLOGY: GNEISS;
GNEISS BRECCIA;
METAMORPHIC ROCK;
Piece No. : PCES 6 (108-120), 7 (122-148);
Comments : PCE 6 MADE UP OF SEVERAL FRAGMENTS,PCE 7 & FRAGMENTS
OF PCE 6 CONSIST OF ANGULAR FRAGMENTS OF PINKISH-
GRAY GNEISS(& PERHAPS SOME FINER-GRAINED
AMPHIBOLITE) UP TO 3CM ACROSS CEMENTED TOGETHER BY
CALCITE,LARGE AUGEN-LIKE CLOT INCLUDED IN PCE 7;
Leg : 77 Top/Bottom Interval(mm): 0/1300 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 280.80
Core: 31 Top of Core Depth (m) : 278.00
Sect: 2 Top of Section Depth(m): 279.50
LITHOLOGY: AMPHIBOLITE;
METAMORPHIC ROCK;
Piece No. : PCES 1 (0-14), 2 (16-34), 3 (37-64), 6 (117-130);
Comments : FINE-TO-MEDIUM-GRAINED AMPHIBOLITE,DARK GRAY TO
GRAYISH-GREEN,WHITE CALCITE VEINS COMMON IN UPPER
PART ABOVE GNEISS,PINK FELD VEINS OCCUR IN PCES 1+6,
FAINT STEEPLY GNEISSOSE FABRIC IN PCE 6,EXCELLENT
TRANSITION FROM GNEISS TO AMPHIBOLITE BETWEEN
50-70CM(AMPHIBOLITE HAS RELICT GNEISSOSE FABRIC IN
THIS INTERVAL);
Leg : 77 Top/Bottom Interval(mm): 0/1300 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 280.80
Core: 31 Top of Core Depth (m) : 278.00
Sect: 2 Top of Section Depth(m): 279.50
LITHOLOGY: SCHISTOSE GNEISS;
METAMORPHIC ROCK;
Piece No. : PCES 4 (66-89), 5 (93-102);
Comments : DARK GRAY FINE-TO-MEDIUM-GRAINED GNEISS WITH
DISTINCT PORPHYROBLASTIC TO MYLONITIC TEXTURE & A
STEEPLY DIPPING SCHISTOSE TO GNEISSOSE FABRIC(70
DEGREES FROM PERPENDICULAR TO CORE AXIS),RUSTY
WEATHERED & IRREGULAR SHEAR SURFACES WITH COMMON
GREEN & YELLOWISH ALTERATIONS ARE SUBPARALLEL TO
THIS FABRIC,GNEISS IS DARKER-COLORED & HAS MORE
PRONOUNCED FABRIC THAN THAT IN CORE 30;
Leg : 77 Top/Bottom Interval(mm): 0/ 80 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 287.58
Core: 32 Top of Core Depth (m) : 287.50
Sect: 1 Top of Section Depth(m): 287.50
LITHOLOGY: DIABASE;
Piece No. : PCE 1A (0-8);
Texture : EQUIGRANULAR;
Comments : MEDIUM-GRAY TO DARK GRAY(WHEN WET),MAFICS ARE FINER-
GRAINED THAN SUBSEQUENT PCES IN CORE,APPEARS MORE
HOMOGENEOUS THAN REST OF SECTION EXCEPT FOR THE FACT
THAT IT CONTAINS 15% OF ELONGATE QTZ(& FELD?) CLOTS
TO 2X2MM,GOOD PREFERRED ORIENTATION,SCHISTOSE;
Phenocrysts: FELDSPAR
Leg : 77 Top/Bottom Interval(mm): 70/1450 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 288.95
Core: 32 Top of Core Depth (m) : 287.50
Sect: 1 Top of Section Depth(m): 287.57
LITHOLOGY: DIABASE;
Piece No. : PCES 1B (7-13), 2A (15-37), 2B (35-48), 3 (52-63),
4 (65-75), 5A (78-86), 5B (87-95), 5C (95-102),
5D (102-105), 5E (101-131), 5F (129-136),
5G (136-143);
Texture : MEDIUM-GRAINED DIABASE;
Structure : COMMON CALCITE VEINING,SLICKENSIDES OBSERVED ON SIDE
OF VEIN BETWEEN PCES 5C-5E;
Alteration : SCATTERED ACCESSORY PYR,PCES 3+5C-5E VEINS
ASSOCIATED WITH MOD YELLOWISH-BROWN ALTERATION
(10YR 5/4,DARK REDDISH-BROWN(10R 3/4) IN PLACES)
WITH GREENISH OUTERMOST RIM,OUTER SURFACE OF CORE
SHOWS WHITISH WEATHERING-SERICITIZATION OF FELD?;
Comments : MEDIUM-GRAY TO DARK GRAY(WHEN WET),GENERALLY WITHOUT
ANY FABRIC,SMALL SCALE BRECCIATION OBSERVED IN VEINS
OF PCES 3+5C-5E;
Groundmass : FELDSPAR
PYROXENE
BIOTITE
QUARTZ
PLAGIOCLASE
THIN PLAG LATHS,ID QTZ UNCERTAIN;
Replacement: CALCITE
CALCITE VEINING;
SERICITE
Minerals Replaced: FELD
WHITISH,ID SERICITE UNCERTAIN-ON OUTER SURFACE OF
CORE;
Leg : 77 Top/Bottom Interval(mm): 0/1500 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 290.50
Core: 32 Top of Core Depth (m) : 287.50
Sect: 2 Top of Section Depth(m): 289.00
LITHOLOGY: DIABASE;
Piece No. : PCES 1A (1-11), 1B (11-26), 1C (23-34), 1D (34-40),
1E (40-60), 1F (60-66), 1G (66-75), 1H (75-85),
1I (85-92), 1J (92-98), 2A (101-114), 2B (114-121),
2C (119-130), 2D (129-143), 2E (144-149);
Texture : MEDIUM-GRAINED DIABASE,NO APPARENT VARIATION IN
GRAINSIZE,SMILAR TO CORE 32-1;
Structure : INTENSE CALCITE VEINING IN PCES 1A-1B+1G & LESS
INTENSE IN PCES 1C-1E+1I-1J+2D-2E;
Alteration : GREENISH-BROWNISH ALTERATION AROUND VEINS IN PCES
1A-1B+1F-1H+1J;
Comments : MEDIUM-GRAY,VEINING APPARENTLY INVOLVES BRECCIATION
IN PCE 1B;
Replacement: CALCITE
CALCITE VEINS;
Leg : 77 Top/Bottom Interval(mm): 0/1500 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 292.00
Core: 32 Top of Core Depth (m) : 287.50
Sect: 3 Top of Section Depth(m): 290.50
LITHOLOGY: DIABASE;
Piece No. : PCES 1A (1-9), 1B (9-25), 2 (28-37), 3 (39-53),
4A (57-66), 4B (67-75), 4C (76-86), 4D (87-103),
4E (104-111), 4F (112-120), 4G (120-129),
4H (129-149);
Texture : MEDIUM-GRAINED DIABASE,NO PRONOUNCED DIFFERENCE IN
GRAINSIZE-MAY BE SLIGHTLY MORE COARSE THAN PREVIOUS
CORES,OCCASIONALLY MARGINS OF VEINS LOOK CHILLED
(FINER-GRAINED),LESS OBVIOUSLY XTLLN IN PCES 4A-4C,
SIMILAR TO CORES 32-1 & 32-2;
Structure : STRONG CALCITE VEINING IN PCES 1A-1B+4A-4H;
Alteration : BROWN & GREENISH ALTERATION AROUND VEINS IN PCES
4E-4F+4H,LESS XTLLN IN PCES 4A-4C TO SOME EXTENT
MAY BE DUE TO ALTERATION;
Comments : MEDIUM-GRAY,SOME BRECCIATION IN VEIN IN PCES 4E-4F;
Replacement: CALCITE
CALCITE VEINS;
Leg : 77 Top/Bottom Interval(mm): 0/1500 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 293.50
Core: 32 Top of Core Depth (m) : 287.50
Sect: 4 Top of Section Depth(m): 292.00
LITHOLOGY: DIABASE;
Piece No. : PCES 1A (0-9), 1B (10-20), 1C (20-27), 2A (30-37),
2B (38-51), 2C (51-58), 3A (61-74), 3B (74-87),
3C (87-112), 3D (111-120), 3E (120-133),
4 (136-149);
Texture : FINER-GRAINED RIMS AROUND VEINS IN PCES 3A-3E,NO
CONSPICUOUS CHANGES OR TRENDS IN XTL SIZE,SIMILAR TO
CORES 32-1 THRU 32-3;
Structure : CALCITE VEINS IN PCES 1A-1B+3A-4;
Alteration : ALTERATION RIMS AROUND VEINS IN PCES 3A-3E;
Comments : MEDIUM-GRAY,STRONGLY VEINED AREAS PRODUCE BRECCIATED
APPEARANCE;
Vesicles : VEINS IN PCES 3D+4 HAVE VUGGY CAVITIES IN THEIR
CENTERS;
Replacement: CALCITE
IN VEINS;
Leg : 77 Top/Bottom Interval(mm): 0/1500 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 295.00
Core: 32 Top of Core Depth (m) : 287.50
Sect: 5 Top of Section Depth(m): 293.50
LITHOLOGY: DIABASE;
Piece No. : PCES 1A (0-9), 1B (9-25), 2A (29-48), 2B (49-55),
2C (48-51), 2D (56-59), 2E (56-59), 2F (60-80),
2G (80-86), 2H (87-91), 2I (60-61), 3A (95-100),
3B (101-104), 4 (107-122), 5 (127-148);
Texture : NO CONSPICUOUS GRAINSIZE DIFFERENCES BUT TENDENCY
FOR THERE TO BE A DARKER FINER-GRAINED(?) AREA
AROUND VEINS,SIMILAR TO CORES 32-1 THRU 32-4;
Structure : ABUNDANT CALCITE VEINING,VERY LARGE CALCITE VEINS IN
PCES 2B+2E+2H-2I+3B+4;
Alteration : PCES 2B+2E+4 HAVE REDDISH-BROWN UNIDENT.MIN WHICH
MAY BE AN ALTERATION PRODUCT(POSSIBLY GARNET?);
Comments : MEDIUM-GRAY,SOME REDDISH-BROWN MATERIAL IN PCES
2B+2E+4 WHICH APPEARS TO BE BRECCIATED FRAGMENTS
(POSSIBLY GARNET?) & PROBABLY IS SOME TYPE OF
ALTERATION PRODUCT;
Vesicles : VEINS IN PCES 1A+3B HAVE VUGGY HOLLOW CENTERS;
Replacement: CALCITE
IN VEINS,PCES 2B+2E+2H-2I+4 HAVE LARGE CALCITE
XTLS IN CENTERS TO 6X10MM;
UNIDENTIFIED
REDDISH-BROWN MATERIAL IN PCES 2B+2E+4 WHICH IS
POSSIBLY SOME TYPE OF ALTERATION PRODUCT;
Leg : 77 Top/Bottom Interval(mm): 0/1500 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 296.50
Core: 32 Top of Core Depth (m) : 287.50
Sect: 6 Top of Section Depth(m): 295.00
LITHOLOGY: DIABASE;
Piece No. : PCES 1A (0-10), 1B (6-10), 2 (13-16), 3 (19-28),
4 (31-39), 5 (43-50), 6 (53-69), 7 (70-87),
8A (90-100), 8B (100-114), 9A (118-125),
9B (127-137), 10 (140-149);
Texture : SIMILAR TO CORES 32-1 THRU 32-5,VEINS OFTEN MARKED
BY DARK FINE-GRAINED EDGES,NO APPARENT CHANGES IN
GRAINSIZE;
Structure : LITTLE CALCITE VEINING,SOMETIMES VEINS DO NOT
CONTAIN CALCITE;
Comments : MEDIUM GRAY,PCE 5 COMPRISED OF MANY SMALL PCES;
Replacement: CALCITE
LITTLE CALCITE VEINING;
Leg : 77 Top/Bottom Interval(mm): 0/1350 Analyst: Tyson, R.
Hole: 538A Sample Midpoint (m) : 297.85
Core: 32 Top of Core Depth (m) : 287.50
Sect: 7 Top of Section Depth(m): 296.50
LITHOLOGY: DIABASE;
Piece No. : PCES 1 (3-7), 2 (12-34), 3 (36-46), 4 (49-57),
5 (60-75);
Texture : SIMILAR TO CORES 32-1 THRU 32-6;
Structure : RARE CALCITE VEINING;
Alteration : WEATHERED RUBBLE IN PCE 5;
Comments : MEDIUM-GRAY,PCE 5 COMPRISED OF RUBBLE & MARKS END OF
CORE 32;
Replacement: CALCITE
RARE CALCITE VEINS;
Leg : 77 Top/Bottom Interval(mm): 0/1150 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 297.65
Core: 33 Top of Core Depth (m) : 296.50
Sect: 1 Top of Section Depth(m): 296.50
LITHOLOGY: DIABASE;
Piece No. : PCES 1 (0-5), 2 (7-15), 3A (17-31), 3B (30-37),
4 (38-40), 5 (42-45), 6A (47-58), 6B (58-71),
6C (71-85), 6D (85-100), 6E (95-105), 6F (105-115);
Texture : MEDIUM-GRAINED;
Structure : ABUNDANT WHITE CALCITE VEINS THROUGHOUT;
Alteration : EXT
SERPENTINIZED OR GREEN SMEC MESOSTASIS,GREEN SMEC
OUTLINES VEINS;
Comments : DARK GREENISH-GRAY DIABASE,BASAL PART OF PCE 6F
BELOW SUBHORIZONTAL CALCITE VEIN HAS RELICT
METAMORPHIC(GNEISSIC) FABRIC;
Phenocrysts: PLAGIOCLASE
Size(mm): 1
CLOTTED PLAG CLUSTERS;
PYROXENE
PYX SET IN A SERPENTINIZED OR GREEN SMEC MESOSTAS;
FELDSPAR
SOME PINK FELD REMNANTS FOUND IN CALCITE VEIN IN
PCE 6F(BASAL PART);
Replacement: CALCITE
VEINS;
SMECTITE
GREEN,LINES VEINS;
Leg : 77 Top/Bottom Interval(mm): 1150/1350 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 297.85
Core: 33 Top of Core Depth (m) : 296.50
Sect: 1 Top of Section Depth(m): 297.65
LITHOLOGY: AMPHIBOLITE;
METAMORPHIC ROCK;
Piece No. : PCE 7 (118-132);
Alteration : EXT
Comments : POORLY DEVELOPED ALTERED TEXTURE WITH LARGE LENS
(RELICT PORPHYROBLASTS) OF PINK POTASH FELD,GOOD
SLICKENSIDES,PCE 7 COMPRISED OF SEVERAL FRAGMENTS;
Leg : 77 Top/Bottom Interval(mm): 0/ 500 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 298.50
Core: 33 Top of Core Depth (m) : 296.50
Sect: 2 Top of Section Depth(m): 298.00
LITHOLOGY: AMPHIBOLITE;
METAMORPHIC ROCK;
Piece No. : PCES 1 (1-37), 2 (41-50);
Comments : DARK GREEN TO REDDISH BROWN,BRECCIATED ALTERED
AMPHIBOLITE,SLICKENSIDES COMMON ON MANY FRAGMENTS,
SOME FRAGMENTS OF PCE 1 SEEM TO HAVE A RELICT
GNEISSOSE FABRIC,PRESERVED SHEAR DIRECTION(APPARENT
DIP) IS 60 DEGREES TO CORE AXIS;
Leg : 77 Top/Bottom Interval(mm): 500/1350 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 299.35
Core: 33 Top of Core Depth (m) : 296.50
Sect: 2 Top of Section Depth(m): 298.50
LITHOLOGY: AMPHIBOLITE;
METAMORPHIC ROCK;
Piece No. : PCES 3 (53-60), 4 (62-74), 5 (76-93), 6A (96-106),
6B (105-112), 6C (113-119), 7 (121-135);
Comments : DARK GRAY AMPHIBOLITE WITH PINK FELD PORPHYROBLASTS
& LINEATION,TEXTURE APPEARS TO BE SLIGHTLY RELICT &
INDISTINCT,PCES 4+6B-7 GREENISH ALTERED AMPHIBOLITE
RELICT PORPHYROBLASTS PRESENT WITH SOME SLICKENSIDES
NOTED,PCES ARE FINE-GRAINED EXCEPT FOR
PORPHYROBLASTS,PCES 5+6A(TOP) MOSTLY DARK GRAY
SLIGHTLY PORPHYRITIC WITH SINGLE PINK FELD VEIN(?) &
APPARENT FELD PORPHYROBLASTS BUT GNEISS-METAMORPHIC
STRUCTURE NOT WELL-DEVELOPED;
Leg : 77 Top/Bottom Interval(mm): 0/1200 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 300.70
Core: 33 Top of Core Depth (m) : 296.50
Sect: 3 Top of Section Depth(m): 299.50
LITHOLOGY: AMPHIBOLITE;
METAMORPHIC ROCK;
Piece No. : PCES 1 (0-4), 2 (8-12), 3 (16-29), 4A (32-37),
4B (38-44), 5A (46-59), 5B (60-68), 6 (71-78),
7 (81-92), 8 (94-107), 9 (109-118);
Comments : PCES 1-2+9 SOMEWHAT ALTERED GRAY AMPHIBOLITE WITH
INDISTINCT PINK FELD PORPHYROBLASTS 1-2MM ACROSS THE
FELD ARE MOSTLY IN STREAKY CLUSTERS,PCES 3-4+7 ARE
GREEN & FINELY XTLLN TO APHANITIC ALTERED
AMPHIBOLITE-ALMOST A SERPENTINITE(SCRATCHES WITH
FINGERNAIL) WITH SOME RELICT & FABRIC-FELD
PORPHYROBLASTS & SOME DARK LENS-LIKE REMNANTS,TOP OF
PCE 3 HAS DISTINCT GNEISS FABRIC ABOVE CALCITE VEIN,
PART OF PCE 4 & PCES 5-6 ARE DARK GRAY-GREEN
AMPHIBOLITE FINELY-GRAINED & ZTLLN WITH SOME
YELLOWISH ALTERATION & SOME SLIGHT RELICT & FABRIC(?
-PARTLY SERPENTINIZED AMPHIBOLITE;
Leg : 77 Top/Bottom Interval(mm): 0/1450 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 306.95
Core: 34 Top of Core Depth (m) : 305.50
Sect: 1 Top of Section Depth(m): 305.50
LITHOLOGY: AMPHIBOLITE;
METAMORPHIC ROCK;
Piece No. : PCES 1A (0-9), 1B (9-26), 1C (26-35), 2 (37-45),
3 (48-55), 4 (59-64), 5A (66-74), 5B (73-90),
5C (90-107), 6 (110-145);
Comments : ALL PCES MEDIUM-GRAY TO GREENISH-GRAY VERY FINE-
GRAINED AMPHIBOLITE WITH COMMON CALCITE-FILLED
FRACTURES THROUGHOUT,SOME INTERSECTING FRACTURES
CONTAIN ANGULAR PCES OF HOST ROCKS IN THEM,SOME PCES
HAVE LARGE 1MM PLAG PHENOS(PCES 1+6 FOR EXAMPLE)-
SOME OF THESE ARE CRUDELY ALIGNED(PCES 1A-1B+6 FOR
EXAMPLE);
Leg : 77 Top/Bottom Interval(mm): 0/ 210 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 307.21
Core: 34 Top of Core Depth (m) : 305.50
Sect: 2 Top of Section Depth(m): 307.00
LITHOLOGY: AMPHIBOLITE;
Leg : 77 Top/Bottom Interval(mm): 0/ 210 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 307.21
Core: 34 Top of Core Depth (m) : 305.50
Sect: 2 Top of Section Depth(m): 307.00
LITHOLOGY: METAMORPHIC ROCK;
Piece No. : PCE 1A (1-21);
Comments : PCE 1A RIDDLED WITH CALCITE VEINS BUT LEAST ALTERED
PCE OF SECTION-BADLY ALTERED FINE-GRAINED
AMPHIBOLITE;
Leg : 77 Top/Bottom Interval(mm): 210/1500 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 308.50
Core: 34 Top of Core Depth (m) : 305.50
Sect: 2 Top of Section Depth(m): 307.21
LITHOLOGY: GNEISS;
METAMORPHIC ROCK;
Piece No. : 1B (21-28), 2 (32-35), 3A (40-47),
3B (42-52), 4 (55-60), 5A (63-76), 5B (75-84),
6 (87-94), 7A (97-110), 7B (108-129), 8 (131-140),
9 (143-150);
Comments : PCE 1B LARGE GNEISS XENOLITH WITH DARK
HALO-GNEISS IS MOSTLY PINK FELD(HOST IS
AMPHIBOLITE),PCES 2-9 A COMPLEX ASSOCIATION OF
XENOLITH GNEISS IN AMPHIBOLITE HIGHLY ALTERED TO
GREEN CLAY IN PLACES,PCES 3+5 ARE ALTERED
AMPHIBOLITES WITH RELICT FELD PORPHYROBLASTS &
GNEISSOSE FABRIC & CALCITE VEINS,FAINT OUTLINES OF A
GNEISS XENOLITH OCCUR IN PCE 3,PCE 6 IS A STRONGLY
MYLONITIZED GNEISS,PCE 7 IS AMPHIBOLITE WITH RELICT
FELD PORPHYROBLASTS & GNEISSOSE TEXTURE THAT IS
ALTERED TO CLAY.MIN & APPARENTLY BRECCIATED IN PCE
7A & SOMEWHAT LESS ALTERED & MORE INTACT IN PCE 7B,
PCES 8+9 ARE YELLOWISH-GRAY TO REDDISH ALTERED
GNEISSES & AMPHIBOLITES WITH XENOLITHS OR SUBROUNDED
GNEISS FRAGMENTS(BRECCIA-LIKE TEXTURES);
Leg : 77 Top/Bottom Interval(mm): 0/ 280 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 308.78
Core: 34 Top of Core Depth (m) : 305.50
Sect: 3 Top of Section Depth(m): 308.50
LITHOLOGY: GNEISS;
METAMORPHIC ROCK;
XENOLITHIC GNEISS IN ALTERED AMPHIBOLITE;
Piece No. : PCES 1 (1-5), 2 (8-15), 3 (18-25);
Comments : PCES 1-3 HIGHLY ALTERED (YELLOWISH-GRAY
TO REDDISH WITH CHAOTIC INTERVAL STRUCTURE),PCE 3 IS
ACTUALLY A BRECCIA WITH SMALL FRAGMENTS OF GNEISS IN
CHAOTIC ARRANGEMENT;
Leg : 77 Top/Bottom Interval(mm): 280/ 600 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 309.10
Core: 34 Top of Core Depth (m) : 305.50
Sect: 3 Top of Section Depth(m): 308.78
LITHOLOGY: AMPHIBOLITE;
Piece No. : PCES 4 (28-33), 5 (37-40), 6 (42-48), 7 (52-58);
Comments : MEDIUM-GRAY AND ALTERED
BUT NOT HIGHLY(AMPHIBOLITES)-SUGGESTS BRECCIATED OR
STOPED CONTACT OF MAFIC DIKE(?) WITH GNEISS COUNTRY
ROCK(NO GOOD FELD PORPHYROBLASTS ON CUT SURFACES BUT
COMMON PINK FELD ON WEATHERED OR ROUND SURFACE);
Leg : 77 Top/Bottom Interval(mm): 0/1500 Analyst: Halley, R.
Hole: 538A Sample Midpoint (m) : 316.00
Core: 35 Top of Core Depth (m) : 314.50
Sect: 1 Top of Section Depth(m): 314.50
LITHOLOGY: DIABASE;
Piece No. : PCES 1A (0-5), 1B (3-18), 1C (18-23), 1D (23-28),
1E (25-33), 1F (32-42), 1G (40-58), 1H (56-64),
1I (64-72), 1J (72-80), 1K (81-89), 1L (89-94),
1M (93-101), 1N (100-112), 1O (112-122),
1P (122-131), 1Q (131-141), 1R (141-148);
Texture : FINE-TO-MEDIUM-GRAINED DIABASE;
Structure : ABUNDANT LARGE CALCITE VEINS,PCE 1G HAS VEIN(OR
LENS) OF PINK FELD & WHITE QTZ(TO 2CM THICK),HOST
LITHOLOGY JUST ABOVE SILIC VEIN(?);
Alteration : EXT
SOME BRICK-RED ALTERATION PATCHES(1MM) NEAR VEIN,
ALTERATION APPARENTLY INCREASES DOWNCORE,
YELLOWISH-ORANGE ALTERATION PATCHES;
Comments : GREENISH-GRAY DIABASE;
Phenocrysts: FELDSPAR
PINKISH COLOR;
Replacement: QUARTZ
CALCITE
VEINS;
SMECTITE
GREENISH;
UNIDENTIFIED
RED & YELLOWISH-ORANGE ALTERATION PATCHES;
Leg : 77 Top/Bottom Interval(mm): 0/ 650 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 316.65
Core: 35 Top of Core Depth (m) : 314.50
Sect: 2 Top of Section Depth(m): 316.00
LITHOLOGY: AMPHIBOLITE;
METAMORPHIC ROCK;
Piece No. : PCES 1A (0-8), 1B (6-10), 2A (13-25), 2B (25-32),
2C (32-38), 3 (40-45), 4 (48-53), 5 (55-65);
Comments : HIGHLY ALTERED AMPHIBOLITE WITH SOME MEDIUM TO COARS
GRAINED RELICT FABRIC - HINT OF LINEATION BUT
CLEAR;
Leg : 77 Top/Bottom Interval(mm): 660/1500 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 317.50
Core: 35 Top of Core Depth (m) : 314.50
Sect: 2 Top of Section Depth(m): 316.66
LITHOLOGY: DIABASE;
Piece No. : 6A (66-72), 6B (72-84), 6C (84-105), 6D (104-123),
6E (124-131), 7 (133-139), 8 (142-148);
Comments : DARK GREENISH-GRAY,PCES 6A-6E REPRESENT
GRADATIONAL CHANGE FROM CALCITE-VEINED CONTACT
BETWEEN "OVERLYING" AMPHIBOLITE AND DIABASE,
CONTACTS WITH DIORITE
COMPLEX & EXTENSIVELY VEINED WITH CALCITE,PCE 8 HAS
CALCITE FRACTURE WITH A REDDISH UNIDENT.MIN(SILICA?)
FILLING THE FINAL VOID SPACES;
Leg : 77 Top/Bottom Interval(mm): 0/1500 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 319.00
Core: 35 Top of Core Depth (m) : 314.50
Sect: 3 Top of Section Depth(m): 317.50
LITHOLOGY: DIABASE;
Piece No. : PCES 1A (60-65), 1B (15-34), 1C (34-55), 1D (53-61),
1E (60-65), 1F (65-73), 1G (73-95), 1H (95-112),
1I (112-120), 1J (120-130), 1K (135-150);
Texture : FINE-GRAINED,APPARENTLY SEEMS TO BE OF FAIRLY
UNIFORM GRAINSIZE THROUGHOUT;
Structure : ABUNDANT CALCITE VEINS,LARGE VEIN(PCE 1H) AT 100-
110CM WITH ABUNDANT ANGULAR DIABASE FRAGMENTS & SOME
PINKISH MINERALIZATION;
Alteration : EXT
Comments : GREENISH-GRAY DIABASE;
Replacement: CALCITE
ABUNDANT CALCITE VEINS;
Leg : 77 Top/Bottom Interval(mm): 0/1350 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 320.35
Core: 35 Top of Core Depth (m) : 314.50
Sect: 4 Top of Section Depth(m): 319.00
LITHOLOGY: DIABASE;
Piece No. : PCES 1A (0-5), 1B (5-10), 1C (10-30), 1D (30-40),
1E (40-45), 1F (45-52), 1G (52-83), 1H (82-98),
1I (98-107), 1J (107-115), 1K (115-122),
2 (125-132);
Texture : FINE-TO-MEDIUM-GRAINED,HOMOGENEOUS;
Structure : ABUNDANT CALCITE VEINS,SOME CALCITE VEINS STILL HAVE
OPEN VUGS NEAR CENTERS,PINKISH MINERAL(FELD) IN SOME
OF THE VEINS;
Alteration : MOD
Comments : GRAY TO GREENISH-GRAY DIABASE;
Vesicles : OPEN VUGS NEAR CENTERS OF CALCITE VEINS WITH
EUHEDRAL CALCITE XTLS GROWING IN;
Phenocrysts: FELDSPAR
PINKISH MINERAL(POSSIBLY FELD) IN SOME VEINS;
Replacement: CALCITE
EUHEDRAL XTLS IN VUGS IN CALCITE VEINS;
Leg : 77 Top/Bottom Interval(mm): 0/ 200 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 323.70
Core: 36 Top of Core Depth (m) : 323.50
Sect: 1 Top of Section Depth(m): 323.50
LITHOLOGY: AMPHIBOLITE;
METAMORPHIC ROCK;
Piece No. : PCES 1 (2-8), 2 (11-18);
Comments : DARKISH-GREEN TO GRAY AMPHIBOLITE WITH SOMEWHAT
INDISTINCT GNEISSIC TEXTURE-PINK FELD & WHITE QTZ
HAVE FUZZY OR INDISTINCT BOUNDARIES,CONTACT WITH
UNDERLYING DIABASE IS A DRILLING BREAK;
Leg : 77 Top/Bottom Interval(mm): 200/1280 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 324.78
Core: 36 Top of Core Depth (m) : 323.50
Sect: 1 Top of Section Depth(m): 323.70
LITHOLOGY: DIABASE;
Piece No. : PCES 3 (21-24), 4 (27-31), 5A (34-42), 5B (43-53),
5C (53-62), 6 (65-70), 7A (73-83), 7B (83-85),
7C (85-93), 7D (93-106), 7E (106-117), 7F (117-121),
7G (120-128);
Texture : FINE-GRAINED,HOMOGENEOUS,NO CLEAR CONTACT WITH
OVERLYING GNEISS FRAGMENTS;
Structure : COMMON CALCITE VEINS,YELLOWISH-ORANGE VEINS IN PCE
7F;
Alteration : MOD
PCE 7F(LOWER PART) HAS YELLOWISH-ORANGE
ALTERATION;
Replacement: CALCITE
CALCITE VEINS;
Leg : 77 Top/Bottom Interval(mm): 1310/1500 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 325.00
Core: 36 Top of Core Depth (m) : 323.50
Sect: 1 Top of Section Depth(m): 324.81
LITHOLOGY: GNEISS;
GNEISS-DIABASE BRECCIA;
METAMORPHIC ROCK;
Piece No. : PCES 7H (131-136), 8 (139-141),
9 (141-144), 10 (146-150);
Comments : BRECCIAS(PCES 7H+9-10) ARE CALCITE-CEMENTED,VARIABLY
ALTERED TO CLAY.MIN & CONTAIN ANGULAR FRAGMENTS OF
FINE-GRAINED DIABASE,ALTERED GNEISS & FRAGMENTS OF
GREEN ROCK(ALTERED AMPHIBOLITES) WITH BRICK-RED
INCLUSIONS & ALTERATIONS,PCE 8 IS A GNEISS WITH A
STRONG METAMORPHIC FABRIC;
Leg : 77 Top/Bottom Interval(mm): 0/ 500 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 325.50
Core: 36 Top of Core Depth (m) : 323.50
Sect: 2 Top of Section Depth(m): 325.00
LITHOLOGY: GNEISS BRECCIA;
METAMORPHIC ROCK;
Piece No. : PCES 1 (2-8), 2A (11-13), 2B (13-18), 3 (20-42),
4 (47-50);
Comments : SIMILAR TO BRECCIA OF CORE 36-1,PCE 1 HAS ABUNDANT
BRICK-RED MINERALIZATION,PCE 3 CONTAINS
DARK GREEN FRAGMENTS OF ALTERED GNEISS AND
AMPHIBOLITES;
Leg : 77 Top/Bottom Interval(mm): 500/1500 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 326.50
Core: 36 Top of Core Depth (m) : 323.50
Sect: 2 Top of Section Depth(m): 325.50
LITHOLOGY: DIABASE;
Piece No. : PCES 5A (56-65), 5B (65-72), 5C (73-85), 5D (85-91),
5E (92-100), 5F (101-107), 5G (104-110),
6A (113-120), 6B (120-131), 6C (130-140),
6D (141-150);
Texture : MEDIUM-TO-COARSE-GRAINED DIABASE;
Structure : PCES CUT BY ABUNDANT CALCITE VEINS,VEINS HAVE PINK-
RED MINERALIZATION(FELD?);
Alteration : EXT
Phenocrysts: PYROXENE
Size(mm): TO 1
DARK PYX PHENOS-ID UNCERTAIN;
Replacement: CALCITE
VEINS;
FELDSPAR
ID FELD AS PINK-RED MINERALIZATION UNCERTAIN;
Leg : 77 Top/Bottom Interval(mm): 0/1350 Analyst: Pisciotto, K.
Hole: 538A Sample Midpoint (m) : 327.85
Core: 36 Top of Core Depth (m) : 323.50
Sect: 3 Top of Section Depth(m): 326.50
LITHOLOGY: DIABASE;
DRILLING BRECCIA;
Piece No. : PCES 1A (1-27), 1B (23-48), 1C (48-70), 1D (70-73),
1E (73-88), 1F (90-96), 1G (88-96), 2 (98-116),
3 (119-134);
Texture : PCES 1A-1G SIMILAR TO PCES 5A-6D OF CORE 36-2,COARSE
-GRAINED INTERVAL BETWEEN 30-60CM,FELD GIVES ROCK A
GABBROIC APPEARANCE,FAIRLY SHARP CHANGE TO FINER-
GRAINED ROCK AT 64CM THEN A SLIGHTLY COARSER-GRAINED
INTERVAL AT 76-84CM;
Structure : CALCITE VEINS WITH GREEN SMEC(?) MINERALIZATION
COMMON ALONG THEM;
Alteration : MOD
Comments : PCES 2-3 DRILLING BRECCIA OF SAME FINE-GRAINED
DIABASE AS IN PCES 1A-1G;
Phenocrysts: FELDSPAR
LIGHT GREENISH-GRAY FELD COMMON GIVING ROCK A
GABBROIC APPEARANCE;
Replacement: CALCITE
CALCITE VEINS;
SMECTITE
ID SMEC UNCERTAIN AS MINERALIZATION ALONG VEINS;
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