Leg : 76 Top/Bottom Interval(mm): 100/ 200 Analyst: Cotillon, P.
Hole: 534A Sample Midpoint (m) : 1635.39
Core: 127 Top of Core Depth (m) : 1630.50
Sect: CC Top of Section Depth(m): 1635.29
LITHOLOGY: APHYRIC BASALT;
Texture : APHYRIC;
Comments : GREYISH BLACK(N2), THIN SECTION HAS VARIOLITIC
FELDSPAR LATHS;
Vesicles : FILLED VESICLES;
Groundmass : FELDSPAR
WHITE FELDSPAR LATHS;
Leg : 76 Top/Bottom Interval(mm): 0/1400 Analyst: Tyson, R.
Hole: 534A Sample Midpoint (m) : 1640.90
Core: 128 Top of Core Depth (m) : 1639.50
Sect: 1 Top of Section Depth(m): 1639.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (0-8), 2A (10-31), 2B (31-44), 2C (45-53),
3 (55-63), 4 (65-71), 7A (82-91), 7B (84-91),
8A (93-100), 8B (101-110), 9 (112-118),
10 (121-130), 11 (133-140);
Texture : APHYRIC, GLASSY BASALT(75CM AND 131CM) IS FINE-
GRAINED(?) AND OCCURS AS THIN(UP TO 2CM) TO THICK
LAYERS APPARENTLY ON MARGINS OF FLOW(?) UNITS, TOP
1CM OF PCE(2A) IS FINER-GRAINED-POSSIBLE CHILLED
MARGIN;
Structure : COMMON CALCITE VEINS UP TO 2MM ACROSS, COMMON
GREENISH BLACK(5GY2/1) TO DARK GREENISH GREY(5G4/1)
ALTERATION PRODUCTS ALONG FRACTURES AND WITH CALCITE
IN VEINS AND SOMETIMES MODERATE YELLOWISH-BROWN
(10YR5/4) THIN PYRITE FILMS COMMON ALONG SOME
FRACTURES;
Alteration : MOD;
Comments : BASALT IS DARK GREY(N3) AND GLASSY BASALT IS GREYISH
BLACK(N2) TO GREENISH BLACK(5GY2/1) DEPENDING ON
THE EXTENT OF ALTERATION, THERE ARE THREE FLOW UNITS
1(0-75), 2(75-131), 3(131-END);
Vesicles : Size(mm): 1 Percent:
BASALT HAS BLACK SPECKLES-CIRCULAR AMYGDULES
POSSIBLY FILLED WITH CLAYS AND OPAQUES AND ALSO
MEDIUM DARK GREY(N4) AMYGDULES BOTH ABOUT 1MM IN
DIAMETER, SPARSELY TO MODERATELY VESICULAR
(GENERALLY INFILLED), PCES(2A-C) ARE MORE
AMYGDALOIDAL WITH PCE(2A) LESS VESICULAR;
Replacement: PYRITE
CALCITE
CLAYS
POSSIBLY CLAYS AND OPAQUES FILL CIRCULAR
AMYGDULES;
Leg : 76 Top/Bottom Interval(mm): 740/ 810 Analyst: Tyson, R.
Hole: 534A Sample Midpoint (m) : 1640.31
Core: 128 Top of Core Depth (m) : 1639.50
Sect: 1 Top of Section Depth(m): 1640.24
LITHOLOGY: CALCITIC CLAYSTONE;
Piece No. : PCES 5 (74-77), 6 (79-81);
Comments : DARK REDDISH BROWN(10R3/4), CONTAINS IRREGULAR
FRAGMENTS(?) OF GLASSY BASALT <2CM ACROSS(ESP. PCE
(5)), WHERE THERE IS A CALCITE MASS(1X2CM) OF
GREYISH-BLUE-GREEN COLOUR(5BA3/2);
Leg : 76 Top/Bottom Interval(mm): 0/1470 Analyst: Tyson, R.
Hole: 534A Sample Midpoint (m) : 1642.47
Core: 128 Top of Core Depth (m) : 1639.50
Sect: 2 Top of Section Depth(m): 1641.00
LITHOLOGY: APHYRIC BASALT;
IDENTICAL TO CORE 128-1;
Piece No. : PCES 1A (2-15), 1B (12-21), 2 (24-25), 3 (27-29),
4 (31-34), 5 (35-43), 6 (45-51), 7 (52-57),
8A (60-65), 8B (65-67), 9 (72-78), 10 (80-96),
11 (98-108), 12 (110-116), 13 (119-125),
14 (127-134), 15 (136-147);
Texture : TOP OF PCE(14) HAS 5MM GLASSY BASALT UNDERLAIN BY
5MM OF FINER-GRAINED NON-VESICULAR BASALT, TOP OF
PCE(9) HAS 1CM OF GLASSY BASALT UNDERLAIN BY 5MM OF
FINER-GRAINED NON-VESICULAR BASALT, APHYRIC;
Structure : FRACTURES;
Alteration : MOD;
Comments : 3 FLOW UNITS: 3 IS CONTINUED FROM 128-1 PCES(1-8),
4 PCES(9-14), 5 PCES(14-15);
Vesicles : BLACK INFILLED VESICLES ARE MORE ABUNDANT IN THE
VICINITY OF FRACTURES, PCES(9,14) ARE UNDERLAIN BY
NON-VESICULAR BASALT;
Leg : 76 Top/Bottom Interval(mm): 0/1040 Analyst: Pisciotto, K.
Hole: 534A Sample Midpoint (m) : 1643.54
Core: 128 Top of Core Depth (m) : 1639.50
Sect: 3 Top of Section Depth(m): 1642.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (1-13), 1B (7-10), 1C (11-21), 2 (22-25),
3 (26-32), 4 (36-45), 5A (46-53), 5B (52-61),
6 (64-80), 7 (83-92), 8 (94-96), 9 (99-104);
Texture : APHYRIC, NO GLASSY MARGINS OBSERVED, PCES(1C, PARTS
OF 6,7,8) APPEAR FINER-GRAINED THAN OTHERS;
Structure : MODERATELY FRACTURED WITH SOME CALCITE-(AND SOME
GREEN SMECTITE(?) MIXED IN) VEINS;
Alteration : MOD;
Comments : PCE(9) IS A GREENISH-GREY MIXTURE OF CALCITE AND
SMECTITE(ALTERED GLASS ?) AND YELLOWISH PALAG(?),
DARK GREY(N3) VERY SIMILAR TO BASALT IN SECT(1,2),
ONE FLOW UNIT: 5 PCES(1A-9);
Vesicles : SCATTERED VESICLES FILLED WITH DARK GREEN SMEC(?),
VESICLES SPARSE NEAR BASE OF PCE(1C) AND PARTS OF
PCES(6,7,8);
Replacement: SMECTITE
CALCITE
PALAGONITE
Leg : 76 Top/Bottom Interval(mm): 1060/1210 Analyst: Pisciotto, K.
Hole: 534A Sample Midpoint (m) : 1643.71
Core: 128 Top of Core Depth (m) : 1639.50
Sect: 3 Top of Section Depth(m): 1643.56
LITHOLOGY: CLAYEY LIMESTONE;
Piece No. : PCES 10 (106-110), 11 (113-121);
Comments : ONE-HALF OF PCE(11) IS LIMESTONE, THEN LARGE CALCITE
VEIN, THEN APHYRIC BASALT;
Leg : 76 Top/Bottom Interval(mm): 1130/1210 Analyst: Pisciotto, K.
Hole: 534A Sample Midpoint (m) : 1643.71
Core: 128 Top of Core Depth (m) : 1639.50
Sect: 3 Top of Section Depth(m): 1643.63
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 11 (113-121);
Texture : BASALT BELOW LARGE CALCITE VEIN(CA. 117CM) IS
APHYRIC;
Structure : SMALL CALCITE-VEINED BASALT FRAGMENTS IN LIMESTONE
JUST ABOVE LARGE HORIZONTAL CALCITE VEIN;
Alteration : MOD;
Comments : BLACK, ONE FLOW UNIT: 6 PCES(11-?), TOP PART OF
PCE(11) IS CLAYEY LIMESTONE WITH SEVERAL WHITE
CALCITE VEINS;
Replacement: CALCITE
Leg : 76 Top/Bottom Interval(mm): 0/1460 Analyst: Tyson, R.
Hole: 534A Sample Midpoint (m) : 1645.46
Core: 128 Top of Core Depth (m) : 1639.50
Sect: 4 Top of Section Depth(m): 1644.00
LITHOLOGY: APHYRIC BASALT;
VESICULAR;
Piece No. : PCES 1A (1-6), 1B (7-25), 1C (24-40), 1D (40-46),
1E (46-61), 2A (64-82), 2B (82-96), 2C (97-105),
2D (104-121), 2E (113-131), 3 (133-140),
4 (143-146);
Texture : APHYRIC, GLASSY MARGINS ON BACK SIDES OF PCES(3,4),
GRAIN SIZE APPEARS TO COARSEN FROM TOP OF PCE(1A) TO
ABOUT 16CM THEN UNIFORM BELOW, PCES(1A, TOP OF 1B)
APPEAR TO BE FINER-GRAINED THAN REST OF SECTION;
Structure : SCATTERED FRACTURES AND CALCITE-(SMEC ?) FILLED
VEINS;
Alteration : MOD;
Comments : DARK GREY(N3), FLOW UNIT 6 CONTINUED TO END OF SECT;
Vesicles : Size(mm): Percent: .5-1
Location: Filling: SMEC, CALCITE
VESICULAR, MAYBE FILLED WITH DARK-GREEN SMEC(?) &
WHITE CALCITE, VESICLES APPEAR TO OCCUR AROUND
VEINS, PCE(2A) HAS ONE SIDE WITH CALCITE-FILLED
VESICLES AND THE OTHER WITH SMEC-FILLED VESICLES;
Replacement: SMECTITE
CALCITE
PYRITE
SEVERAL SMALL PYRITE CRYSTALS IN PCE(1E);
Leg : 76 Top/Bottom Interval(mm): 0/1250 Analyst: Pisciotto, K.
Hole: 534A Sample Midpoint (m) : 1646.75
Core: 128 Top of Core Depth (m) : 1639.50
Sect: 5 Top of Section Depth(m): 1645.50
LITHOLOGY: APHYRIC BASALT;
VESICULAR;
Piece No. : PCES 1A (1-12), 1B (14-18), 2A (22-27), 2B (28-31),
3 (34-40), 4 (41-49), 5 (62-65), 6 (68-71),
7A (73-91), 7B (92-110), 8 (113-125);
Texture : APHYRIC, GLASSY MARGINS(ALTERED TO CLAY) IN PCES(2B,
4) WITH TOP OF PCE(4) CHILLED;
Structure : CALCITE AND SMECTITE VEINS COMMON AS MARKED;
Alteration : MOD;
Comments : DARK GREY(N3), GLASSY MARGINS MARK BOUNDARIES OF
FLOW UNITS: 7(0-35), 8(35-70), 9(70-125), PCE(6)
CONTAINS A PCE OF BASALT SURROUNDED ON ONE SIDE BY
MIXED CALCITE AND YELLOWISH BROWN PALAGONITE(?),
OUTER COATING OF QUARTZ ON ONE SIDE OF SAMPLE
(CALCITE LAYER JUST BELOW THIS), SMALL PCE OF
REDDISH LIMESTONE IN RUBBLE OF PCE(3);
Vesicles : VESICULAR, VESICLES FILLED WITH DARK GREEN SMEC ?;
Replacement: SMECTITE
CALCITE
PALAGONITE
Leg : 76 Top/Bottom Interval(mm): 0/1360 Analyst: Pisciotto, K.
Hole: 534A Sample Midpoint (m) : 1649.86
Core: 129 Top of Core Depth (m) : 1648.50
Sect: 1 Top of Section Depth(m): 1648.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1 (2-10), 2 (12-36), 3 (38-46), 4 (44-51),
5 (53-59), 6 (62-66), 7A (67-74), 7B (75-85),
8 (86-89), 9 (93-95), 10A (98-111), 10B (108-110),
11 (113-130), 12 (132-136);
Texture : APHYRIC, PCES(3,7 ?) HAVE GLASSY MARGINS, ONE
SURFACE HAS SPHERULITIC(BOTRYOIDAL) QTZ, PCE(1) IS
APHANITIC;
Structure : CALCITE-SMECTITE(?) FILLED VEINS ARE COMMON,
FRACTURES;
Alteration : MOD
PCE(1) IS HIGHLY ALTERED;
Comments : DARK GREY(N3), TWO FLOW UNITS: 10 PCES(1-2), 11
PCES(3-12);
Vesicles :
Location: Filling: CALCITE, SMECTITE
SCATTERED VESICLES FILLED WITH DARK GREEN SMEC(?)
AND WHITE CALCITE, VESICLES ARE LARGER AND MORE
NUMEROUS IN PCES(4-7B);
Groundmass : QUARTZ
ONE SURFACE OF PCE(1) HAS OUTER COATING OF
SPHERULITIC(BOTRYOIDAL) QUARTZ OVERLYING GREEN
CLAYS THEN A THIN DISCONTINUOUS WHITE CALCITE
LAYER OVER ALTERED BASALT;
Replacement: CALCITE
FIBROUS CALCITE GROWS PERPENDICULAR TO FRACTURES
IN SOME CASES;
SMECTITE
CLAY
CLAYS ARE GREEN;
Leg : 76 Top/Bottom Interval(mm): 1370/1500 Analyst: Pisciotto, K.
Hole: 534A Sample Midpoint (m) : 1650.00
Core: 129 Top of Core Depth (m) : 1648.50
Sect: 1 Top of Section Depth(m): 1649.87
LITHOLOGY: CLAYEY LIMESTONE AND APHYRIC BASALT;
MASSIVE;
Piece No. : PCES 13 (127-143), 14 (146-148);
Texture : APHYRIC, SOME ALTERED GLASS(?) AND MAYBE SOME
PALAGONATIZED FRAGMENTS AT CONTACT BETWEEN PCE 13 &
12;
Structure : MASSIVE, NO OBVIOUS SEDIMENTARY STRUCTURES;
Alteration : MOD;
Comments : REDDISH-BROWN, COULD BE SILICEOUS(?), PCE(13) SHOWS
A SHARP CONTACT BETWEEN CLAYSTONE AND BASALT;
Leg : 76 Top/Bottom Interval(mm): 0/1360 Analyst: Kostecki, J.A.
Hole: 534A Sample Midpoint (m) : 1651.36
Core: 129 Top of Core Depth (m) : 1648.50
Sect: 2 Top of Section Depth(m): 1650.00
LITHOLOGY: APHYRIC BASALT;
VESICULAR;
Piece No. : PCES 1A (0-9), 1B (9-16), 1C (16-18), 1D (17-23),
1E (23-27), 1F (27-43), 2A (44-46), 2B (46-57),
3A (59-61), 3B (61-69), 3C (69-85), 4 (87-90),
5A (94-95), 5B (94-103), 6 (105-124), 7 (125-128),
8A (132-134), 8B (135-136);
Texture : APHYRIC, FINE-GRAINED, SECTION 2A SEEMS TO BE CAPPED
BY GLASSY BASALT WITH AN ALTERED ZONE BELOW,
HYALOCLASTITE 10-31CM;
Structure : PCE(1A) CONTAINS SEVERAL FRACTURES WHICH MAY HAVE
BEEN INFILLED WITH RED METALLIFEROUS SEDIMENTS WITH
QUARTZ VEINS IN THE BOTTOM HALF INTER-MINGLING WITH
THE SEDIMENT IN THE MIDDLE, PCES(1B-1F) ARE
BRECCIATED BASALT FRAGMENTS IN A MATRIX OF
HYDROTHERMAL QUARTZ AND CALCITE AND GREENISH COLOR
IS PROBABLY SMEC, PCE(2B) IS A FRACTURED BASALT;
Alteration : MOD
SECTIONS (2A,3C) HAVE ALTERED ZONES;
Comments : THREE FLOW UNITS: 12 (1A-1F), 13 (2A-3B),
14 (3C-8B), PCES(4-END) ARE FRACTURED VESICULAR
BASALT, SEDIMENTS ARE RED AND METALLIFEROUS AND ID
IN PARTS UNCERTAIN;
Vesicles : Size(mm): .1-1 Percent:
VESICULAR BASALT, VESICLES ABOUT .1MM AT TOP OF
SECTION GRADUALLY INCREASING TO ABOUT 1MM;
Groundmass : QUARTZ
PCE(6) CONTAINS HYDROTHERMAL QUARTZ, PCES(3A,3B)
CONTAIN QUARTZ INFILLED WITH HYDROTHERMAL
CALCITE;
Replacement: CALCITE
SMECTITE
GREENISH COLOR POSSIBLY SMEC;
Leg : 76 Top/Bottom Interval(mm): 0/1480 Analyst: Pisciotto, K.
Hole: 534A Sample Midpoint (m) : 1652.98
Core: 129 Top of Core Depth (m) : 1648.50
Sect: 3 Top of Section Depth(m): 1651.50
LITHOLOGY: APHYRIC BASALT;
VESICULAR;
Piece No. : PCES 1A (2-15), 1B (14-21), 2 (24-27), 3 (31-48),
4 (49-58), 5 (49-61), 6A (63-78), 6B (79-81),
7A (81-101), 7B (99-111), 7C (112-117),
7D (117-121), 8 (123-130), 9 (133-141),
10 (143-148);
Texture : APHYRIC, GRAIN-SIZE APPEARS UNIFORM THROUGHOUT
EXCEPT IN PCES(8,9) WHERE BASALT APPEARS FINE-
GRAINED NEAR GLASSY(ALTERED) MARGINS, PCE(8) HAS
GLASSY MARGINS ON THREE SIDES WITH A SINUOUS PATTERN
OF APHYRIC BASALT IN-BETWEEN, FRAGMENTS IN PCE(9)
HAVE GLASSY MARGINS AND SEVERAL DARK GLASSY(?)
BANDS;
Structure : SCATTERED CALCITE VEINS AND SMEC-FILLED FRACTURES
LESS COMMON, BROWNISH CLAY(?) MIXED WITH CALCITE IN
SOME VEINS;
Alteration : MOD
CALCITE/SMECTITE ALTERATION IN PCE(9), PCE(5) IS
HIGHLY ALTERED TO CALCITE/SMEC, INTENSE CALCITE &
SMECTITE ALTERATION OF OUTSIDE EDGES OF GLASS;
Comments : DARK GREY(N3);
Vesicles :
Location: Filling: SMECTITE, CALCITE
GREEN SMEC(?) AND CALCITE FILLED VESICULAR BASALT;
Replacement: SMECTITE
ID GREEN SMEC UNCERTAIN IN VESICLES;
CALCITE
CLAY
ID BROWNISH CLAY UNCERTAIN;
Leg : 76 Top/Bottom Interval(mm): 0/1500 Analyst: Kostecki, J.A.
Hole: 534A Sample Midpoint (m) : 1654.50
Core: 129 Top of Core Depth (m) : 1648.50
Sect: 4 Top of Section Depth(m): 1653.00
LITHOLOGY: APHYRIC BASALT;
VESICULAR;
Piece No. : PCES 1A (1-7), 1B (8-10), 1C (10-13), 1D (11-13),
2A (15-29), 2B (28-46), 2C (46-64), 2D (64-82),
2E (80-92), 3A (103-136), 3B (140-150);
Texture : APHYRIC;
Structure : FREQUENT FRACTURING SOMETIMES FILLED WITH
HYDROTHERMAL QUARTZ AND PALAGONITE, PCE(2B)
CONTAINS BASALT WITH A PALAGONITE/QUARTZ VEIN;
Alteration : MOD
SOME OF THE ALTERED ZONE IS COMPOSED OF PALAG;
Comments : ONE FLOW UNIT: 17 PCES(1A-3B);
Vesicles : Size(mm): 1-2 Percent:
Location: Filling: CALCITE
SOME OF THE VESICLES ARE BEGINNING TO BE FILLED
WITH CALCITE-MOSTLY IN THE TOP HALF, PCE(2D) IS
TYPIFIED BY A DISTINCT LOSS OF VESICLES WHEREAS
PCES(1A-C) CONTAIN VESICLES OF 1MM AND THE SIZE
AND FREQUENCY DIMINISHES VERY RAPIDLY BUT IN THE
MIDDLE OF PCE(2D) THE VESICLES ARE AGAIN PRESENT
BUT LESS NUMEROUS, THEIR SIZE RANGE IS ABOUT
1-2MM, THIS TREND CONTINUES UNTIL PCE(3B) WHERE
VESICLES ARE AGAIN NUMEROUS;
Groundmass : QUARTZ
PCE(2A) IS QUARTZ FILLED ABOUT HALF ITS LENGTH
GRADUALLY CHANGING TO A QUARTZ/PALAGONITE VEIN;
Replacement: CALCITE
PALAGONITE
Leg : 76 Top/Bottom Interval(mm): 0/ 890 Analyst: Kostecki, J.A.
Hole: 534A Sample Midpoint (m) : 1655.39
Core: 129 Top of Core Depth (m) : 1648.50
Sect: 5 Top of Section Depth(m): 1654.50
LITHOLOGY: APHYRIC BASALT;
VESICULAR;
Piece No. : PCES 1 (2-12), 2 (15-22), 3 (25-40), 4 (42-61),
5 (64-66), 6 (70-80), 7 (82-89);
Texture : APHYRIC, PCES(1) ARE GLASSY BASALT, PCE(2) HAS A
GLASSY TOP;
Structure : FREQUENT FRACTURES MOSTLY FILLED WITH HYDROTHERMAL
QUARTZ;
Alteration : MOD;
Comments : TWO FLOW UNITS: 17 PCES(1)-CONTINUED FROM CORE 29-4,
AND 18 PCES(2-7);
Vesicles :
Location: Filling: CALCITE, GLASS
PCE(2) HAS CALCITE FILLING VESICLES WHILE THE
REMAINDER OF THE SECTION(PCES 3 ON) IS FAIRLY
SIMILAR WITH ABOUT 50/50 RATIO OF CALCITE TO GLASS
FILLED VESICLES, PCE(7) CONTAINS 100% CALCITE
VESICLES;
Replacement: CALCITE
GLASS
Leg : 76 Top/Bottom Interval(mm): 0/1500 Analyst: Halley, R.
Hole: 534A Sample Midpoint (m) : 1659.00
Core: 130 Top of Core Depth (m) : 1657.50
Sect: 1 Top of Section Depth(m): 1657.50
LITHOLOGY: APHYRIC BASALT;
VESICULAR;
Piece No. : PCES 1A (0-14), 1B (13-21), 1C (22-23), 2A (25-36),
2B (34-41), 2C (37-41), 3A (42-46), 3B (43-51),
3C (52-54), 4A (55-61), 4B (61-67), 4C (66-70),
5 (71-73), 6A (74-92), 6B (93-100), 7 (101-130),
8 (131-139), 9 (113-146);
Texture : APHYRIC, GENERALLY GRAINS ARE TOO SMALL TO SEE BUT
PLAG LATHS >1MM ARE APPARENT IN PCES(2-4), CHILLED
MARGINS AT (0,98,148 CM) ARE VERY NARROW(3-5MM) AND
HAVE LOST MOST OF THEIR GLASSY LUSTRE, POSSIBLE
CHILLED MARGIN AT 76CM;
Structure : FRACTURES OCCASIONALLY FILLED WITH CALCITE IN PCES
(6,7) WHILE OTHERS MAY BE FILLED WITH CELADONITE OR
CLAY, MARGIN AT 143CM IS HIGHLY FRACTURED;
Alteration : MOD
ALTERATION RIMS APPAARENT ONLY IN PCE(6C), MARGIN
AT 143CM MAY BE ALTERATION ZONE;
Comments : DARK GREY(N3), THREE FLOW UNITS: 19 PCES(1A-5),
20 PCES (6A-B), 21 PCES(7-9);
Vesicles : Size(mm): 0.1-1 Percent:
Location: Filling: CELADONITE, SMEC
Location: Filling: CALCITE, PYRITE,
Location: Filling: CHALCEDONY
VESICLES USUALLY FILLED WITH DARK MINERAL-
CELADONITE, SMEC(?), WITH ABOUT 30% FILLED WITH
CALCITE(MORE LOCALLY AT 7&8), AND A FEW FILLED
WITH CHALCEDONY OR PYRITE;
Groundmass : PLAGIOCLASE
Size(mm): >1
PLAG LATHS >1MM APPARENT IN PCES(2-4);
Replacement: PYRITE
SCATTERED ALONG FRACTURES;
CALCITE
CHALCEDONY
SMECTITE
ID SMEC IN VESICLES UNCERTAIN;
CELADONITE
CLAY
Leg : 76 Top/Bottom Interval(mm): 0/1500 Analyst: Halley, R.
Hole: 534A Sample Midpoint (m) : 1660.50
Core: 130 Top of Core Depth (m) : 1657.50
Sect: 2 Top of Section Depth(m): 1659.00
LITHOLOGY: APHYRIC BASALT;
VESICULAR;
Piece No. : PCES 1 (0-14), 2A (15-44), 2B (45-66), 2C (66-69),
3 (71-75), 4 (78-83), 5 (85-86), 6 (90-102),
7 (104-150);
Texture : APHYRIC, CHILLED MARGIN AT TOP OF PCE(6)-90CM AND
VERY NARROW AND PRESERVED ONLY AT TOP OF PCE;
Structure : FRACTURES FILLED WITH WHITE(N9) CALCITE AND CLEAR
QUARTZ AND BLACK(N1) &/OR LIGHT OLIVE BROWN(5Y5/6)
MINERAL, GLASSY VEIN AT 80CM, 40CM(OBLIQUE);
Alteration : MOD
ALTERATION RIMS ARE NARROW-LESS THAN 2MM, LIGHT
BROWN(5YR5/6) TO DARK YELLOWISH-ORANGE(10YR6/6);
Comments : DARK GREY(N3), FLOW UNITS: 22 PCES(1-5) AND 23
PCES(6-7);
Vesicles : Size(mm): 0.1-1 Percent:
Location: Filling: CELADONITE, SMEC
Location: Filling: CALCITE, PYRITE,
Location: Filling: QUARTZ
USUALLY FILLED WITH DARK MINERAL(N1) POSSIBLY
CELADONITE OR SMEC AND CA. 30% FILLED WITH CALCITE
AND A FEW WITH PYRITE OR QUARTZ;
Groundmass : PLAGIOCLASE
Size(mm): 0.5-1
PLAG LATHS USUALLY LARGE ENOUGH TO BE SEEN BY EYE;
Replacement: CELADONITE
SMECTITE
CALCITE
PYRITE
Leg : 76 Top/Bottom Interval(mm): 0/1480 Analyst: Halley, R.
Hole: 534A Sample Midpoint (m) : 1661.98
Core: 130 Top of Core Depth (m) : 1657.50
Sect: 3 Top of Section Depth(m): 1660.50
LITHOLOGY: APHYRIC BASALT;
SAME AS DESCRIBED IN CORE 130 SECTION(1-2);
Piece No. : PCES 1 (3-5), 2 (7-23), 3 (27-37), 4A (40-44),
4B (44-60), 4C (60-67), 5A (69-77), 5B (74-78),
6 (80-81), 7A (82-92), 7B (93-100), 8 (101-103),
9A (104-116), 9B (116-132), 9C (133-147);
Texture : APHYRIC, CHILLED MARGIN AT TOP OF PCE(2);
Structure : FRACTURES;
Comments : TWO CONTINUING FLOW UNITS: 23 PCES(PREVIOUS SECTION
TO 1), 24 PCES(2-9C);
Vesicles : VESICLES ARE BLACK INFILLED AND LIGHT GREY AND
SHOW ANTIPATHETIC DISTRIBUTION-FORMER CLOSER TO
FRACTURES;
Leg : 76 Top/Bottom Interval(mm): 0/1450 Analyst: Halley, R.
Hole: 534A Sample Midpoint (m) : 1663.45
Core: 130 Top of Core Depth (m) : 1657.50
Sect: 4 Top of Section Depth(m): 1662.00
LITHOLOGY: APHYRIC BASALT;
SAME AS IN PREVIOUS THREE SECTIONS;
Piece No. : PCES 1 (0-6), 2 (7-20), 3A (21-30), 3B (31-44),
4 (45-46), 5 (47-53), 6 (55-72), 7 (75-93),
8 (95-98), 9 (101-102), 10 (105-102), 11 (124-133),
12 (137-145);
Texture : APHYRIC, CHILLED MARGINS(?) AT TOP OF PCES(3B,7)-
NEITHER IS GLASSY, VERY DENSE;
Structure : FRACTURE AT TOP OF PCE(3B) LOOKS MORE LIKE A VEIN/
FRACTURE;
Comments : TWO FLOW UNITS: 24 PCES(FROM 130-3 TO 6) AND
25 PCES(7-12);
Leg : 76 Top/Bottom Interval(mm): 0/1350 Analyst: Halley, R.
Hole: 534A Sample Midpoint (m) : 1664.85
Core: 130 Top of Core Depth (m) : 1657.50
Sect: 5 Top of Section Depth(m): 1663.50
LITHOLOGY: APHYRIC BASALT;
SAME AS PREVIOUS FOUR SECTIONS;
Piece No. : PCES 1A (1-15), 1B (15-21), 2 (25-46), 3 (51-60),
4 (61-65), 5 (67-71), 6A (74-91), 6B (92-94),
7 (98-107), 8 (110-126), 9 (129-135);
Texture : APHYRIC, CHILLED GLASSY MARGIN EXHIBITED AT TOP OF
PCES(1A,1D,5,8), PCE(7) HAS CONSIDERABLE GLASS AND
IS VERY FINE-GRAINED WITH NO MACROSCOPIC PLAG-
MAYBE A HOLOHYALINE OR HYPOCRYSTALLINE BASALT,
PCE(7) ALSO CONTAINS GLASSY SHARDS-PROBABLY A
HYALOCLASTITE;
Alteration : MOD;
Comments : THREE FLOW UNITS: 26 PCES(1A-4), 27 PCES(5-6B),
28 PCES (7-9);
Vesicles : PCE(7) DIFFERS FROM REST BECAUSE IT HAS NO
VESICLES;
Leg : 76 Top/Bottom Interval(mm): 0/ 910 Analyst: Halley, R.
Hole: 534A Sample Midpoint (m) : 1665.91
Core: 130 Top of Core Depth (m) : 1657.50
Sect: 6 Top of Section Depth(m): 1665.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 1A (4-13), 1B (14-63), 2 (66-78), 3A (80-83),
3B (80-83), 3C (85-87), 3D (85-92), 3E (88-91);
Texture : PRINCIPALLY APHYRIC, POSSIBLE GLASSY MARGINS AT BASE
OF PCE(1A) AND TOP OF PCE(1B);
Structure : CALCITE VEINS SPARSE IN PCE(1B), AT BASE OF PCE(1A)
AND TOP OF PCE(2B) HAVE QUARTZ AND CALCITE AND
GLASSY BASALT(12.5-15CM);
Alteration : MOD;
Comments : PCES IN THIS SECTION EXCEPT PCES(1A-B) ARE
HOMOGENEOUS, TWO FLOW UNITS: 28 PCES(CONTINUING FROM
130-5 TO 1A), 29 PCES(1B-3E);
Vesicles :
Location: Filling: CLAY, CALCITE
CLAY AND CALCITE FILLED VUGS;
Groundmass : QUARTZ
PRESENT AT 12.5-15CM;
Replacement: CALCITE
ALSO PRESENT AT 12.5-15CM;
CLAY
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