Leg : 34 Top/Bottom Interval(mm): 0/1500 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 121.50
Core: 13 Top of Core Depth (m) : 115.50
Sect: 4 Top of Section Depth(m): 120.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (89-98), 2 (101-107), 3 (110-116),
4 (119-124), 5 (127-132), 6 (135-140),
7 (142-147);
Texture : FINE-GRAINED, APHYRIC, GRAIN SIZE <0.2MM;
Structure : MANY BOUNDING JOINTS REMAIN WHERE NOT ABRADED DURING
DRILLING, INTERIOR JOINTS ARE FEW and NON-PENETRATIVE-
ALL OTHER JOINTS WERE BROKEN DURING DRILLING, VEINS
OF FE.OXIDE and MN.OXIDE and BROWN and BROWN-GREEN and RED-
BROWN and YELLOW and YELLOW-GREEN SMECTITE;
Comments : LIGHT TO MEDIUM GRAY OR BROWNISH GRAY, GENERALLY
UNORIENTED, JOINT-BOUNDED BLOCKS, OUTER RELATIVELY
ALTERED RIMS OF MEDIUM BROWN OR DARK BROWNISH TO
YELLOWISH GRAY;
Vesicles : Size(mm): TO 0.7 Percent: TO0.5
Location: Filling: EMPTY, SMECTITE
RARE LARGER HOLES UP TO 1.1MM, GENERALLY EMPTY IN
FRESHER INTERIORS OR RARELY HAVE BLUE SMECTITE
LINING, IN OUTER RIMS VESICLES ARE FILLED OR LINED
BY BROWN OR YELLOW-GREEN SMECTITE OR STAINED BY
FE.OXIDE;
Phenocrysts: PLAGIOCLASE
TWO PLAGIOCLASES MEASURING 0.8X0.5 and 0.4X0.1MM IN
INTERVAL 89-98CM;
OLIVINE
R.I. (N GAMMA) >1.6784, FO87-88, ONE OLIVINE IN
INTERVAL 89-98CM;
Replacement: FERROUS OXIDE
MANGANESE OXIDE
SMECTITE
Leg : 34 Top/Bottom Interval(mm): 890/ 980 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 120.98
Core: 13 Top of Core Depth (m) : 115.50
Sect: 4 Top of Section Depth(m): 120.89
LITHOLOGY: SLIGHTLY MICROPHYRIC BASALT;
Piece No. : PCE 1 (89-98);
Texture : SLIGHTLY MICROPHYRIC;
Comments : PIECE WAS IN CONTACT WITH SEDIMENT BUT CONTACT WAS
EVIDENTLY DISTURBED ALTHOUGH VAGUE SIGNS OF BEDDING
IN OVERLYING SEDIMENT (PALAG-BEARING WITH INCIPIENT
ALTERATION TO SMECTITE) ARE HORIZONTAL, PCE 1 IS
ALMOST SEMI-CYLINDRICAL and COULD NOT HAVE DRILLED
THIS WAY WITH SEDIMENT ON ONE SIDE--SO OTHER SIDE
WAS LOST AND SEDIMENT OOZED IN, SKETCH ON MICROFILM,
SIDE 1 IS LIGHT TO MEDIUM ASH GRAY WITH A VAGUE
YELLOW TINGE, SIDE 2 IS DARK YELLOWISH OR BROWNISH
GRAY, 70 DEGREE JOINT COATED WITH GREEN-BROWN &
BROWN-GREEN BOTRYOIDAL SMECTITE and MINOR MN.OXIDE
SPOTS (THE OLIVINE CRYSTAL WAS EXPOSED HERE),
NON-PENETRATIVE RARE UNSTAINED CRACKS;
Vesicles : Size(mm): TO 0.5 Percent:
Location: Filling: EMPTY, SMECTITE
VESICLES EMPTY IN SIDE 1 (RARELY SLIGHTLY VUGGY),
FILLED WITH YELLOW-GREEN OR BROWN SMECTITE ON
DARKER SIDE (SIDE 2);
Phenocrysts: PLAGIOCLASE
ONE PLAGIOCLASE MEASURING 0.8X0.5MM, TWO MEASURING
0.4X0.1MM;
OLIVINE
ONE OLIVINE MEASURING 0.4X0.25MM, R.I. (N GAMMA)
>1.6784, FO87-88;
Replacement: MANGANESE OXIDE
FERROUS OXIDE
SMECTITE
BROWN SMECTITE and FE.OXIDE ON TOP, RUSTY BROWN
SMECTITE ON BOTTOM;
Leg : 34 Top/Bottom Interval(mm): 1010/1070 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 121.07
Core: 13 Top of Core Depth (m) : 115.50
Sect: 4 Top of Section Depth(m): 121.01
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 2 (101-107);
Texture : APHYRIC;
Comments : SIMILAR TO PCE 1 BUT NO PHENOCRYSTS, SAME COLORS AS
PCE 1, ONE SURFACE COATED BY RUSTY BROWN SMECTITE &
FE.OXIDE and LOOKS LIKE BOTTOM OF PCE 1--THEY SEEM TO
FIT--IF SO THE 70 DEGREE JOINT IN PCE 1 CONTINUES AS
BOUNDARY OF PCE 2 BUT STEEPENS TO 85 DEGREES;
Vesicles :
Location: Filling: EMPTY, SMECTITE
VESICLES AS IN PCE 1 - FILLED and EMPTY
CORRESPONDINGLY (ALTERED VS. "FRESH");
Replacement: SMECTITE
ONE BOTTOM SURFACE HAS DARK BROWN SMECTITE;
FERROUS OXIDE
Leg : 34 Top/Bottom Interval(mm): 1100/1160 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 121.16
Core: 13 Top of Core Depth (m) : 115.50
Sect: 4 Top of Section Depth(m): 121.10
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 3 (110-116);
Texture : APHYRIC;
Structure : NO JOINTS ON SURFACE OR INTERNALLY;
Comments : WHOLLY ABRADED, DARK YELLOWISH GRAY TO DARK GRAY;
Vesicles : Size(mm): TO 0.5 Percent: 0.5
Location: Filling: EMPTY, SMECTITE
FILLED WITH BROWN SMECTITE IN YELLOWISH GRAY AREA,
UNFILLED IN DARK GRAY AREA;
Replacement: SMECTITE
Leg : 34 Top/Bottom Interval(mm): 1180/1240 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 121.24
Core: 13 Top of Core Depth (m) : 115.50
Sect: 4 Top of Section Depth(m): 121.18
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 4 (119-124);
Texture : APHYRIC (NOTHING >0.2MM), FINE-GRAINED;
Structure : ROTATED JOINT BLOCK, BOUNDING VEINS OF RED-BROWN
FE.OXIDE (OXIDIZED SMECTITE?) and LIGHT TAN TO CREAM
SMECTITE and YELLOW GREEN SMECTITE (MINOR), FEW
INTERIOR JOINTS - NONPENETRATIVE WITH WAXY YELLOW-
GREEN SMECTITE IN ONE and OTHERS RUSTY;
Alteration : FRESH;
Comments : UNORIENTED, MEDIUM GRAY, BLUE FILM ON BOTRYOIDAL (0R
VUGGY?) BROWN-GREEN SMECTITE ON ONE SURFACE (OPEN
JOINT?) - SURFACES HAVE IRREGULAR HOLES;
Vesicles : Size(mm): TO 0.25 Percent:
Location: Filling: EMPTY, SMECTITE
AMYGDULES OF LIGHT YELLOW-GREEN WAXY SMECTITE UP
TO 0.25MM, RARE LARGER ONES HOLLOW and BOTRYOIDAL,
SMECTITE IS RED-BROWN NEAR JOINTS;
Replacement: SMECTITE
FERROUS OXIDE
Leg : 34 Top/Bottom Interval(mm): 1270/1320 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 121.32
Core: 13 Top of Core Depth (m) : 115.50
Sect: 4 Top of Section Depth(m): 121.27
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 5 (127-132);
Texture : APHYRIC (<0.2MM), FINE-GRAINED;
Structure : MASSIVE, JOINT BLOCK SURFACES CONTAIN RUSTY RED-
BROWN FE.OXIDE and SMECTITE and LOCALLY MN.OXIDE, ONE
VEIN OF WAXY BROWN TO YELLOW SMECTITE RICHLY SPOTTED
WITH MN.OXIDE SPOTS UP TO 1MM (SOME ARE SMOOTHLY
ROUNDED BOTRYOIDS), ONE INTERIOR FRACTURE IS
NONPENETRATIVE WITH BROWN STAINS and POSSIBLY BLACK
MN.OXIDE;
Comments : WAXY YELLOW-GREEN SMECTITE REMNANT IN ONE FLAT
SURFACE WHICH IS OTHERWISE RED-BROWN FE.OXIDE &
SMECTITE and MN.OXIDE, LIGHT BROWNISH GRAY;
Vesicles : Size(mm): 0.15 Percent:
Location: Filling: EMPTY
Shape : ROUND
TRACE AMOUNT, SOME HAVE SLIGHTLY VUGGY WALLS;
Replacement: SMECTITE
FERROUS OXIDE
MANGANESE OXIDE
Leg : 34 Top/Bottom Interval(mm): 0/1500 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.50
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.00
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-6), 2 (9-15), 3A (17-26), 3B (25-36),
4 (37-48), 5 (51-62), 6 (64-71), 7 (75-83),
8 (86-92), 9 (95-105), 10 (108-112), 11 (113-121),
12 (124-133), 13 (135-148);
Texture : FINE TO VERY FINE-GRAINED, COARSENS VERY SLIGHTLY
DOWNWARD NEAR TOP, APPARENT FINING OF GRAIN SIZE
NEAR 86CM (PCE 8) and 113CM (PCE 11) - THESE REVERSALS
OF THE NORMAL INCREASE IN GRAIN SIZE DOWNWARD
CORRESPOND TO THE APPEARANCE OF THE ONLY
MICROPHENOCRYSTS OBSERVED - OTHERWISE THE ROCKS ARE
APHYRIC;
Structure : FRACTURES BOUND THE SURFACES OF MOST CORE PIECES BUT
INTERNAL FRACTURES ARE ABSENT OR NONPENETRATIVE,
FLAT FRACTURES OR VEINS CONTROLLED THE SHAPES OF THE
ENDS OF MANY PIECES, VEINS COMPOSED OF SMECTITE &
CALCITE and ARAGONITE and PHILLIPSITE and SULFIDE,
MASSIVE;
Alteration : TOP OF SECTION IS ALTERED - WITH MARKED COLOR
CHANGES IN PCES 1-3, NO ALTERATION BELOW 43CM--
ZONED OR OTHERWISE--APPEARS EXCEPT IN VEINS IN
PCES 8&12;
Comments : COLOR IS DARK GRAY, THE GRAIN SIZE CHANGES AT 86 &
113CM SUGGEST TWO CONTACTS SEPARATING 3 COOLING
UNITS, ZONED RIM-INTERIOR COLOR PAIRS IN PCES 1&2
(DARK YELLOWISH OR BROWNISH GRAY RIMS and MEDIUM
BROWN-GRAY INTERIORS), GREEN-GRAY ROCK OCCURS IN
34-40CM (THE ONLY DISTINCTLY GREEN ROCK OBSERVED IN
THIS OR ANY OTHER HOLE DRILLED ON LEG 34), DARK GRAY
OR PINKISH GRAY ROCK OCCURS IN 40-43CM, BELOW 43CM
THE ROCK IS UNIFORMLY GRAY, DOWN TO 36CM THE
SMECTITES IN THE VEINS ARE BROWN and RED-BROWN and TAN
EXCEPT IN 34-43CM WHERE SOME VEINS ARE BRIGHT GREEN,
BELOW 36CM THE SMECTITES ARE BLUE and BLUE-GREEN &
BLUE-GRAY and GRAY and GRAY-GREEN and GREENISH GRAY &
GREEN and YELLOWISH GREEN and BLACK, IN PCES 8&12 THE
VEINS ARE LOCALLY OXIDIZED TO YELLOW-BROWN and BROWN,
THE SMECTITE BELOW 36CM IS FREQUENTLY BOTRYOIDAL AS
IF IT WERE DEPOSITED IN OPEN SPACES, PHILLIPSITE
APPEARS IN PCE 4 and IS LAST SEEN IN PCE 8--IT IS
NEVER ABUNDANT and APPEARS VUGGY IN SOME CASES, THE
SULFIDE FIRST APPEARS AT ABOUT 42CM and PERSISTS
THROUGHOUT THE REST OF THE SECTION AS A MAJOR OR
MINOR VEIN COMPONENT, THE ASSOCIATION GREEN
SMECTITE-PHILLIPSITE-SULFIDE WAS NOT SEEN AT SITE
319--OTHERWISE THE ASSEMBLAGES IN THIS AND LOWER
SECTIONS ARE SIMILAR TO THOSE AT SITE 319;
Vesicles : Size(mm): TO 1.0 Percent: 0.5-2
Location: THROUGHOUT Filling: EMPTY, SMEC, CARB
Location: Filling: SULFIDE, CALCITE
VESICLES 0.5-1.5 OR 2% - GENERALLY 1%, MAXIMUM
SIZE <1.0MM EXCEPT RARELY UP TO 1.5MM IN PCE 4 -
THE MAXIMUM SIZE IS SLIGHTLY SMALLER (0.6-0.8MM)
IN THE UPPER PART ABOVE 36CM, THEY GENERALLY VARY
FROM EMPTY TO SMECTITE-LINED (BROWN and LIGHT OR
DARK GREEN and BLUE-GRAY and BLUE and BLUE-GREEN) TO
WHOLLY OR PARTIALLY FILLED BY SMECTITE (BROWN DOWN
TO 36CM and GREEN OR BLUE-GREEN BELOW 36CM and RARELY
ABOVE) OR CARBONATE (CALCITE IN SOME OR MAYBE ALL
CASES), THE CARBONATE APPEARS ONLY BELOW 51CM &
(IN VARIOUS PIECES AND ESPECIALLY THE UPPER PART
OF THE SECTION) OCCURS ONLY AWAY FROM SMECTITE
VEINS, RARE SULFIDE CRYSTALS IN CARBONATE
AMYGDULES IN PCE 9, NEAR SMECTITE and SULFIDE VEINS
THE AMYGDULES TEND TO BE FILLED BY THE VEIN
MINERAL - THE SMECTITES ARE BROWN OR RARELY GREEN
IN THE UPPER ALTERED PART (ABOVE 36CM) and GREEN TO
BLUE-GREEN BELOW 36CM, IN THE GREEN-GRAY ROCK (34-
40CM) THE SMECTITE AMYGDULES ARE BRIGHT GREEN
(CELADONITE-LIKE), THE SMECTITE-FILLED AMYGDULES
MAY BE COLOR-ZONED and INCOMPLETE FILLINGS MAY HAVE
BOTRYOIDAL INNER SURFACES;
Phenocrysts: PLAGIOCLASE
THREE PLAGIOCLASES and A GLOMEROCRYST IN PCES 8&9
WITH DIMENSIONS 1.5X0.6 TO 1.8X0.7MM, 2
PLAGIOCLASES IN PCE 11 WITH DIMENSIONS 1X0.4 &
1X0.8MM;
Replacement: ARAGONITE
CALCITE
PHILLIPSITE
SMECTITE
SULFIDE
CARBONATE
Leg : 34 Top/Bottom Interval(mm): 20/ 60 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.06
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.02
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (2-6);
Texture : APHYRIC, FINE-GRAINED;
Comments : DARK BROWNISH GRAY RIM and MEDIUM BROWN-GRAY INTERIOR
WITH A SHARP CONTACT, DARK BROWN SMECTITE ON 60-
DEGREE JOINT, BROWN TO TAN SMECTITE + CALCITE ON
FLAT JOINT;
Vesicles : Size(mm): TO 0.4 Percent:
Location: Filling: SMECTITE
Shape : ROUND
TRACE VESICLES, SOME HAVE BROWN OR GREEN SMECTITE
FILLINGS;
Replacement: SMECTITE
CALCITE
Leg : 34 Top/Bottom Interval(mm): 90/ 150 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.15
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.09
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 2 (9-15);
Texture : FINE-GRAINED (COARSER THAN PCE 1);
Comments : DARK YELLOWISH GRAY RIM and MEDIUM BROWN-GRAY CORE,
VERTICAL CARBONATE and RED-BROWN SMECTITE RIM 1.5MM
THICK (OILS SHOW VERY FINE-GRAINED CALCITE and FINE TO
MEDIUM-GRAINED CALCITE and POSSIBLY ARAGONITE);
Vesicles : Size(mm): TO 0.5 Percent:
Location: Filling: SMECTITE
LIGHT BROWN SMECTITE LININGS IN A FEW VESICLES ON
BOTH RIM and CORE;
Replacement: SMECTITE
CALCITE
CARBONATE
Leg : 34 Top/Bottom Interval(mm): 170/ 360 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.36
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.17
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 3A (17-26), 3B (25-36);
Texture : FINE-GRAINED, APHYRIC ON TOP;
Structure : VERTICAL CARBONATE and RED-BROWN SMECTITE and FE.OXIDE
VEINS 1CM THICK AT TOP and 2CM THICK AT 32CM and TAPERS
TO ZERO AT 34CM WITH SOME DARK GREEN TOWARD BOTTOM,
ANASTOMOSING CROSS-FIBER CALCITE VEINS AT 32-34CM
WITH A 10-DEGREE DIP - NO DISCOLORATION ASSOCIATED
WITH THESE VEINS;
Comments : DARK BROWNISH GRAY, THIS PIECE BROKE INTO TWO--3A&B;
Vesicles : MINOR VESICLES AND BROWN AMYGDULES;
Replacement: SMECTITE
CALCITE
CARBONATE
FERROUS OXIDE
ARAGONITE
COARSE ARAGONITE AT TOP;
Leg : 34 Top/Bottom Interval(mm): 340/ 400 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.40
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.34
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 3B (25-36);
Texture : FINE-GRAINED, APHYRIC;
Comments : GREEN-GRAY COLOR;
Vesicles : Size(mm): TO 0.8 Percent:
Location: Filling: EMPTY, SMECTITE
AMYGDULES and VESICLES LINED OR FILLED WITH GREEN
SMECTITE(?) OR EMPTY;
Replacement: SMECTITE
Leg : 34 Top/Bottom Interval(mm): 400/ 430 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.43
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.40
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 4 (39-48);
Structure : ONE FLAT BRIGHT GREEN VEIN - FAINT GREEN STAIN IN
WALL ROCK FOR 1-2MM;
Comments : DARK GRAY OR PINKISH GRAY;
Vesicles : Size(mm): Percent: 1
Location: Filling: CELAD, SMECTITE
1% VESICLES OR DARK TO BRIGHT GREEN AMYGDULES
(CELADONITE? OR SMECTITE?);
Leg : 34 Top/Bottom Interval(mm): 390/ 480 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.48
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.39
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 4 (39-48);
Texture : APHYRIC, FINE-GRAINED (LIKE PCE 3);
Structure : HAIRLINE SULFIDE VEIN CUTS BOTTOM SURFACE (<0.5MM);
Comments : PHILLIPSITE? and MINOR SULFIDE ON GREENISH GRAY FLAT
BOTTOM SURFACE--VERY LOW BIREFRINGENT TO ISOTROPIC--
REFRACTIVE INDEX <<1.532, COLOR IS DARK and SLIGHTLY
BROWNISH GRAY;
Vesicles : Size(mm): <0.5-1.5 Percent: 1
VESICLES UP TO 1.5MM (COALESCED) BUT COMMONLY
LESS THAN 0.5MM;
Replacement: SULFIDE
Leg : 34 Top/Bottom Interval(mm): 510/ 620 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.62
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.51
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 5 (51-62);
Texture : APHYRIC, FINE-GRAINED;
Structure : UNJOINTED, MASSIVE, COLORLESS VEIN AT TOP ON
GREENISH GRAY SURFACE WITH SULFIDE (LIKE BOTTOM OF
PCE 4);
Comments : REFRACTIVE INDEX SLIGHTLY LESS THAN 1.476, BOTTOM
SURFACE BOTRYOIDAL BLUE-GREEN SMECTITE WITH GRAYISH
FILM ON IT;
Vesicles : Size(mm): <0.6-1 Percent:
Location: Filling: EMPTY, SMECTITE,
Location: Filling: SULFIDE
VESICLES GENERALLY <0.6MM, EMPTY OR THIN SMECTITE
LINING OR--IN LOWER TWO-THIRDS--FILLED (RARELY
PARTLY FILLED) WITH WHITE FINE-GRAINED CALCITE
(R.I.<1.532), RARE SULFIDE;
Replacement: PHILLIPSITE
MOSTLY ANISOTROPIC;
SMECTITE
CALCITE
R.I.<1.532;
SULFIDE
SULFIDE GRAIN IN HOST ROCK ABOUT 2MM AWAY;
Leg : 34 Top/Bottom Interval(mm): 640/ 710 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.71
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.64
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 6 (64-71);
Texture : APHYRIC, FINE-GRAINED;
Structure : MASSIVE, DISCONTINUOUS, FLAT SLIGHTLY RUSTY CRACK
NEAR TOP, TOP SURFACE CONTAINS SAME BLUE-GREEN VEIN
AS BOTTOM OF PCE 5;
Comments : BOTTOM SURFACE IS DARK GREENISH GRAY TO BLACK
SMECTITE? + SULFIDE PATCHES UP TO 5MM ACROSS - TRACE
PHILLIPSITE OR CARBONATE, COLOR IS DARK GRAY;
Vesicles : Size(mm): Percent: 1
Location: Filling: EMPTY, CARB
VESICLES GENERALLY EMPTY (RARE LINING) - MANY
FILLED (RARELY PARTLY FILLED) WITH WHITE
CARBONATE;
Replacement: CARBONATE
PHILLIPSITE
SMECTITE
SULFIDE
Leg : 34 Top/Bottom Interval(mm): 750/ 830 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.83
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.75
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 7 (75-83);
Texture : APHYRIC, FINE-GRAINED;
Structure : MASSIVE, UNFRACTURED;
Comments : COLOR IS DARK GRAY, 70-DEGREE-DIPPING JOINT AT TOP
COVERED BY BOTRYOIDAL BLUE-GREEN SMECTITE + MINOR
SULFIDE - FLATTER EXTENSION OF IT AT TOP HAS PATCH
OF GRANULAR COLORLESS PHILLIPSITE(?);
Vesicles : Size(mm): TO 1 Percent:
Location: Filling: EMPTY, CARB, SMEC
EMPTY, LINED WITH BLUE-GREEN SMECTITE OR FILLED
WITH WHITE CARBONATE, CARBONATE AMYGDULES ONLY ON
BOTTOM TWO-THIRDS OR THREE-FOURTHS, PCES 5-7 LACK
CARBONATE AMYGDULES IN TOP PART, RELATED TO FLAT
FRACTURES;
Replacement: CARBONATE
SMECTITE
SULFIDE
PHILLIPSITE
R.I.<1.470, VAGUE SECTOR TWINNING(?) IN SOME
GRAINS, -2V ABOUT 70 DEGREES;
Leg : 34 Top/Bottom Interval(mm): 860/ 920 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 125.92
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.86
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 8 (86-92);
Texture : FINE-GRAINED, ALMOST APHYRIC;
Structure : 40-DEGREE-DIPPING BLUISH GREEN ("COPPER" TARNISH)
SMECTITE VEIN WITH YELLOW-BROWN EARTHY ALTERATION,
VERTICAL VEINS ON BOTTOM WITH DARK BLUISH GRAY
SMECTITE and MINOR SULFIDE FILMS;
Comments : DARK GRAY, PART OF TOP IS LIGHT GRAY-GREEN SMECTITE
+ TRACE DRUSY PHILLIPSITE + TRACE SULFIDE + LICHEN-
LIKE BLOBS OF WHITE CALCITE (VERY FINE-GRAINED &
RADIAL) LIKE THAT IN VESICLES;
Vesicles : Size(mm): TO 1 Percent:
Location: Filling: EMPTY, CARB, SMEC
IRREGULAR HOLES SLIGHTLY LARGER BUT RARE, EMPTY OR
FILLED WITH CARBONATE (THROUGHOUT) and GREEN
SMECTITE (NEAR GREEN SMECTITE VEIN ON BOTTOM),
EMPTY VESICLES RARELY LINED BY SMECTITE, MANY
CARBONATE AMYGDULES HAVE GREEN SMECTITE LININGS;
Phenocrysts: PLAGIOCLASE
ONE PLAG SEEN WITH DIMENSIONS 1.5X0.6 TO
1.7X0.7MM, PLAG GLOMEROCRYST 4MM ACROSS;
Replacement: SMECTITE
CARBONATE
PHILLIPSITE
SULFIDE
Leg : 34 Top/Bottom Interval(mm): 950/1050 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.05
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 125.95
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 9 (95-105);
Texture : ALMOST APHYRIC, FINE-GRAINED, CONCHOIDAL;
Structure : MASSIVE, TOP and BOTTOM SURFACES ARE IN PART GENTLY
(5-DEGREE) DIPPING GREEN SMECTITE VEINS, AT TOP A
COMPOSITE GREEN TO YELLOWISH GREEN BOTRYOIDAL
SMECTITE VEIN DIPS 60 DEGREES;
Comments : DARK GRAY, IN MIDDLE A STEEP (80-85-DEGREE)
IRREGULAR and DISCONTINUOUS and DARK BLUE-GRAY SMECTITE
FILM WITH DEEP YELLOW SULFIDE PATCHES;
Vesicles : Size(mm): Percent: 1
Location: Filling: EMPTY, CARB,
Location: Filling: SULFIDE
EMPTY WITH FAINT BLUE LINING OR FILLED OR PARTLY
FILLED BY CARBONATE--PARTLY FILLED ONES HAVE ROUND
BLOBS OR (RARELY) DOGTOOTH-POINTED CRYSTALS,
CARBONATE FILLINGS THROUGHOUT, RARE SULFIDE IN
CARBONATE AMYGDULES, LARGE CARBONATE CRYSTALS
FOUND IN AGGREGATES (FIGURES HARD TO GET - ONLY
ONE LOOKS LIKE ARAGONITE), NEAR SMECTITE VEINS AT
TOP SOME VESICLES FILLED OR PARTLY FILLED WITH
GREEN SMECTITE (ZONED and BOTRYOIDAL and MASSIVE);
Phenocrysts: PLAGIOCLASE
ONE PLAG WITH DIMENSIONS 1.8X0.7MM;
Replacement: SMECTITE
ARAGONITE
CARBONATE
SULFIDE
Leg : 34 Top/Bottom Interval(mm): 1080/1120 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.12
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 126.08
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 10 (108-112);
Texture : APHYRIC, FINE-GRAINED (COARSER THAN ABOVE);
Structure : MASSIVE, BOTTOM SURFACE CONTAINS FLAT DARK GREEN
BOTRYOIDAL SMECTITE VEIN WITH LIGHT BLUISH GRAY DULL
COAT - VESICLES NEARBY LINED OR BOTRYOIDALLY FILLED
WITH SIMILARLY ZONED MATERIAL, VERTICAL SULFIDE
VEIN INCLUDING SULFIDE-FILLED VESICLE;
Comments : COLOR IS DARK GRAY;
Vesicles : Size(mm): TO 1 Percent:
Location: Filling: CARB,SMEC,SULFIDE
AVERAGE SIZE LARGER THAN ABOVE, LINED (BLUE) OR
PARTLY FILLED BY CARBONATE (INCLUDING DOGTOOTH
CRYSTALS OR SINGLE ROUNDED HUMPS SIMILAR TO ONES
FROM 45 DEGREES NORTH - MID-ATLANTIC RIDGE MEDIAN
VALLEY - CHAIN 104), COMPLETE FILLINGS UNCOMMON,
APPARENTLY VESICLES NEAR VEINS TEND TO HAVE SOME
OF THE VEIN MINERALS (EXCEPT PHILLIPSITE);
Replacement: SMECTITE
PHILLIPSITE
CARBONATE
SULFIDE
Leg : 34 Top/Bottom Interval(mm): 1130/1210 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.21
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 126.13
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 11 (113-121);
Texture : FINE-GRAINED;
Structure : MASSIVE, BLUE VEIN ON TOP IS FLAT and CONTAINS
SULFIDE, VEIN ON BOTTOM WITH 20-DEGREE DIP CONTAINS
SULFIDE + MINOR BLUE SMECTITE, VERTICAL VEIN OF
SULFIDE + BLUE SMECTITE + PHILLIPSITE (ALMOST
ISOTROPIC - REFRACTIVE INDEX <1.490) + MINOR
CARBONATE;
Comments : COLOR IS DARK GRAY;
Vesicles : Size(mm): TO 1 Percent: 1.5-2
Location: Filling: CARB,SULFIDE,SMEC
VESICLES LOCALLY CLUSTERED, LINED BY BLUE and BLUE-
GREEN and BRIGHT GREEN SMECTITE (& CELADONITE?),
SOME MAY BE ZONED, WHOLLY FILLED BY GREEN SMECTITE
LOCALLY, WHOLE TO PARTIAL CARBONATE FILLINGS
INCLUDING DOGTOOTH CRYSTALS and ROUND CLUMPS, SOME
FILLED WITH SULFIDE;
Phenocrysts: TRACE PHENOCRYSTS UP TO 1X0.4 and 1X0.8MM;
Replacement: SMECTITE
SULFIDE
CARBONATE
PHILLIPSITE
Leg : 34 Top/Bottom Interval(mm): 1240/1330 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.33
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 126.24
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 12 (124-133);
Texture : APHYRIC, FINE OR VERY FINE-GRAINED;
Structure : MASSIVE, BRANCHING and ANASTOMOSING VEIN UP TO 2MM
WIDE CONTAINING MAINLY CALCITE BUT RELATIVELY
COARSELY GRANULAR CARBONATE IN GREENER MATERIAL IS
MARGINAL + SOME ARAGONITE IS PRESENT - ZONED OR
IRREGULAR (LIKE OPHICALCITE) - CARBONATE LOCALLY
VUGGY OR BOTRYOIDAL - 75 TO 25-DEGREE DIP, OTHER
STEEP TO VERTICAL VERY THIN VEINS HAVE GREEN OR
BROWN SMECTITE ONLY;
Comments : COLOR IS DARK GRAY;
Vesicles : Size(mm): Percent: 0.5
Location: Filling: EMPTY, CARB, SMEC
SMECTITE-LINED, SOME FILLED WITH CARBONATE (OFTEN
RIMMED WITH SMECTITE);
Replacement: SMECTITE
CARBONATE
CALCITE
ARAGONITE
Leg : 34 Top/Bottom Interval(mm): 1360/1480 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.48
Core: 14 Top of Core Depth (m) : 125.00
Sect: 1 Top of Section Depth(m): 126.36
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 13 (136-148);
Texture : APHYRIC, FINE TO VERY FINE-GRAINED;
Structure : MASSIVE, NEAR TOP ARE SOME VERY THIN BLUE-GREEN
SMECTITE VEINS WITH MINOR SULFIDE CHIPS VERTICALLY -
STEEP and FLAT;
Vesicles : Size(mm): TO 1.0 Percent: 1
Location: THROUGHOUT Filling: EMPTY, CARB, SMEC
SMECTITE IS GREEN AND MAY CONTAIN BLUE-GREEN
SMECTITE VEINS;
Replacement: SMECTITE
CARBONATE
Leg : 34 Top/Bottom Interval(mm): 0/1500 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 128.00
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 126.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-4), 2 (7-17), 3 (19-29), 4 (31-34),
5 (37-41), 6 (42-54), 7 (56-62), 8 (64-72),
9 (74-84), 10 (84-99), 11 (99-124), 12 (124-131),
13 (131-137), 14 (137-150);
Texture : VIRTUALLY APHYRIC, VERY FINE TO MEDIUM-GRAINED
(MAINLY FINE-GRAINED), DECREASE IN GRAIN SIZE AT
19CM CORRELATES WITH THE APPEARANCE OF RARE PLAG
MICROPHENOCRYSTS and MAY MARK THE TOP OF A COOLING
UNIT - BELOW THAT THERE IS A SLIGHT COARSENING WITH
DEPTH;
Structure : GENTLY TO STEEPLY DIPPING VEINS ARE SCATTERED
THROUGH THE TOP OF SECTION, AT 56-150CM ONE DOMINANT
VERTICAL TO STEEP BRANCHING SYSTEM OF VEINS IS
PRESENT, VEINS ARE MAINLY SMECTITE--GREEN + BLUE-
GREEN + BLUE + DARK GRAY + GRAY-GREEN, SULFIDES
OCCUR IN THE SMECTITE OR FORM THE MAJOR COMPONENT OF
OTHER VEINS, VEIN CARBONATE IS MAINLY CALCITE--IN
SOME CASES DRUSY--BUT INCLUDES SOME ARAGONITE IN PCE
6 - IN GENERAL CARBONATE IS MINOR IN VEINS, IN PCES
3&6 SOME SMECTITE IS LOCALLY OXIDIZED BROWN OR RED
OR RED-BROWN ALONG THE CENTERS OF SOME VEINS - IN
GENERAL THOUGH THE VEINS WERE TIGHT and OXIDIZING
FLUIDS DID NOT PENETRATE THE INTERIORS OF THE FLOW
UNITS;
Comments : STYRAFOAM SPACERS ABOUT 2CM WIDE SEPARATE PIECES OF
CORE THAT ARE NOT PART OF A CONTINUOUS CORE SEGMENT-
AN UNKNOWN AMOUNT OF BASALT IS MISSING FROM THE
PLACES WHERE THE STYRAFOAM HAS BEEN ADDED, COLOR IS
DARK GRAY, POSSIBLE COOLING UNIT BOUNDARY AT 19CM;
Vesicles : Size(mm): 0.6-1.2 Percent: 0.5-1
Location: THROUGHOUT Filling: EMPTY, CARB, SMEC
VESICLES VARY FROM TRACE TO 1.5% and ARE GENERALLY
0.5-1%, MAXIMUM SIZES VARY FROM 0.6-1.2MM &
INCREASE IN A CRUDE WAY WITH DEPTH, SMALL
DIKTYTAXITIC VUGS ARE PRESENT IN PCE 3 (TOP OF
INFERRED LOWER COOLING UNIT)--THEY ARE ONLY ONES
SEEN IN SITE 321 BASALTS, MOST VESICLES PARTLY OR
WHOLLY FILLED BY CARBONATE EXCEPT NEAR SMECTITE
VEINS (AS IN PCES 3&5&6) WHERE THE VESICLES ARE
LINED OR FILLED BY SMECTITE LIKE THAT IN THE
VEINS, IN THE INTERMEDIATE ZONE SMECTITE-LINED
VESICLES MAY HAVE VUGGY TERMINATED CARBONATE
CRYSTALS ON THEIR WALLS, EMPTY VESICLES APPEAR TO
BE DUE ALMOST WHOLLY TO PLUCKING OF SMECTITE OR
CARBONATE AMYGDULES DURING CORING;
Phenocrysts: PLAGIOCLASE
RARE PLAG MICROPHENOCRYSTS (ONE CRYSTAL SEEN WITH
DIMENSIONS 1X0.3MM) APPEAR AT 19CM;
Replacement: CARBONATE
CALCITE
SMECTITE
SULFIDE
ARAGONITE
Leg : 34 Top/Bottom Interval(mm): 0/ 40 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.54
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 126.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-4);
Texture : APHYRIC, VERY FINE TO FINE-GRAINED;
Structure : ONE BLUE-GREEN BOTRYOIDAL VEIN, ONE THIN GREEN VEIN,
ONE OR TWO SULFIDE VEINS;
Alteration : FRESH;
Comments : FOUR SMALL PIECES WITH MAXIMUM SIZE 4CM;
Vesicles : Size(mm): TO 0.6 Percent: 1
Location: Filling: CARB
AMYGDULES GENERALLY FILLED WITH WHITE CARBONATE--
RARELY EMPTY--& PARTLY EMPTY ONES OFTEN SHOW
CLEAVAGE OR CRYSTAL FACE--THE CARBONATE MAY HAVE
BEEN PLUCKED OUT OF THEM, MANY EMPTY ONES HERE &
ABOVE MAY BE SIMILARLY PLUCKED;
Replacement: CARBONATE
SULFIDE
Leg : 34 Top/Bottom Interval(mm): 70/ 170 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.67
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 126.57
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 2 (7-17);
Texture : APHYRIC (LARGEST LATHS 0.4X<0.1MM), FINE-GRAINED
(COARSER THAN ABOVE);
Structure : MASSIVE, 45-DEGREE BOTRYOIDAL BLUE-GREEN SMECTITE
VEIN AT TOP, STEEP 75-DEGREE CALCITE and CARBONATE ON
BLUE-GRAY SMECTITE VEIN AT BOTTOM OF CORE -
CARBONATE IS GRANULAR AND DRUSY - CALCITE (IN OILS)
IS WELL CRYSTALLIZED BUT GRAINS OFTEN WAVY AS IF
MADE OF RADIAL CRYSTALS--THOUGH THEY BREAK AS
RHOMBS;
Comments : COLOR IS DARK GRAY;
Vesicles : Size(mm): Percent: 80
Location: Filling: CARB
SAWED SURFACES OF MINICORES SHOW NO EMPTY
AMYGDULES SO THEY MUST REPLACE CARBONATE AMYGDULES
THAT WERE PLUCKED FROM SURFACE, THERE IS NO
CONSISTENT TOP-BOTTOM PREFERENCE OF HOLES IN
PARTLY FILLED AMYGDULES;
Location: Filling: EMPTY, SMEC
AMYGDULES NEAR TOP VEIN ARE FILLED WITH GREEN
SMECTITE - REST FILLED WITH MOSTLY CARBONATE,
MINOR EMPTY (SMECTITE LINING THIN IF PRESENT);
Replacement: SMECTITE
CALCITE
CARBONATE
Leg : 34 Top/Bottom Interval(mm): 190/ 240 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.74
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 126.69
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 3 (19-24);
Texture : APHYRIC, VERY FINE-GRAINED;
Structure : MASSIVE, 20-DEGREE BLUE-GREEN BOTRYOIDAL SMECTITE
VEIN AT TOP, 65-DEGREE SULFIDE VEIN ON BOTTOM,
CURVED (HELICAL) VERTICAL BLUE BOTRYOIDAL SMECTITE
VEIN WITH LARGE SULFIDE PATCHES IN CENTER and FLAT
BLUE BOTRYOIDAL SMECTITE BRANCH AT BOTTOM (SMECTITE
PARTLY BROWN NEAR BOTTOM);
Vesicles :
Location: Filling: SMECTITE, SULFIDE
VESICLES NEAR TOP VEIN ARE FILLED WITH GREEN
SMECTITE, VESICLES CUT BY VERTICAL VEIN ARE LINED
BY BLUE SMECTITE (ONE WITH DRUSY SULFIDE);
Location: Filling: CARB
VESICLES AWAY FROM THE VEIN ARE FILLED WITH
CARBONATE, THE ZONING OF AMYGDULE TYPE WITH
RESPECT TO VEINS IS SEEN IN BASALT FROM SITE 171-
LEG 17, SOME TINY DIKTYTAXITIC VUGS, SOME BLUE-
LINED VESICLES HAVE SINGLE OR MULTIPLE CARBONATE
CRYSTALS ON WALLS, IN OILS THE CARBONATE AMYGDULES
ARE CALCITE and ARAGONITE(?) - SOME HAVE SMALL 2V &
<10 DEGREES (NOT IDEAL ARAGONITE);
Phenocrysts: PLAGIOCLASE
ONE PLAG WITH DIMENSIONS 1X0.3MM;
Replacement: SMECTITE
CARBONATE
PYRITE
PYRITE IN HOST ROCK NEAR VERTICAL VEIN IS
OXIDIZED;
MARCASITE
LIGHT GRAYISH YELLOW MARCASITE(?) SPALLS OFF
EASILY WHICH IS UNUSUAL FOR SULFIDE VEINS HERE AND
AT SITE 319;
SULFIDE
Leg : 34 Top/Bottom Interval(mm): 310/ 340 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.84
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 126.81
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 4 (31-34);
Texture : APHYRIC, VERY FINE-GRAINED;
Structure : MASSIVE, SULFIDE VEINS ON SURFACE and CUTTING
INTERIOR;
Comments : COLOR IS DARK GRAY, UNORIENTED;
Vesicles : Size(mm): Percent: 1
Location: Filling: EMPTY, SMEC, CARB
EMPTY, SMECTITE-LINED and CARBONATE-FILLED;
Replacement: SULFIDE
SMECTITE
CARBONATE
Leg : 34 Top/Bottom Interval(mm): 370/ 410 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 126.91
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 126.87
LITHOLOGY: BASALT;
Piece No. : PCE 5 (37-41);
Texture : FINE-GRAINED (SLIGHTLY COARSER THAN ABOVE);
Structure : TWO BLUE-GREEN SMECTITE VEINS ARE RUSTY;
Comments : COLOR IS DARK GRAY;
Vesicles :
Location: Filling: EMPTY, SMEC, CARB
TRACE VESICLES EMPTY OR FILLED (OR MOSTLY FILLED)
WITH DARK GREEN SMECTITE and MINOR AMOUNT WITH
CARBONATE, SMECTITE AMYGDULES NEAR THE VEINS -
CARBONATE GENERALLY FARTHER AWAY;
Replacement: SMECTITE
CARBONATE
Leg : 34 Top/Bottom Interval(mm): 420/ 540 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 127.04
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 126.92
LITHOLOGY: BASALT;
MASSIVE;
Piece No. : PCE 6 (42-54);
Texture : FINE-GRAINED;
Structure : MASSIVE, 20-DEGREE VEIN ON TOP IS CARBONATE + MINOR
GREEN SMECTITE, CENTER OF ONE BLUE-GREEN SMECTITE
VEIN IS DEEP RED OR RED-BROWN WAXY SMECTITE;
Comments : COLOR IS DARK GRAY, DARK GRAY SMECTITE(?) FILM ON
BOTTOM WITH SULFIDE DIPS 25 DEGREES;
Vesicles : Size(mm): TO 0.8 Percent: 1
Location: Filling: EMPTY, SMEC, CARB
MOSTLY CARBONATE-FILLED (OR ALMOST FILLED) EXCEPT
NEAR BLUE-GREEN SMECTITE + SULFIDE VEIN WHERE THEY
ARE EMPTY OR SMECTITE-LINED;
Phenocrysts: PLAGIOCLASE
TRACE PLAG PHENOCRYSTS WITH DIMENSIONS 1.5X0.2 &
2X0.5 and 1.8X0.6MM;
Replacement: CARBONATE
CARBONATE FROM TOP VEIN IN OILS SHOWS ARAGONITE
(DISTINCT 2V and 18 DEGREES) and CALCITE (2V=0) &
STRAINED CALCITE OR INTERLAYERED CALCITE &
ARAGONITE (2V and BETWEEN 0-10 DEGREES);
ARAGONITE
CALCITE
SMECTITE
SULFIDE
Leg : 34 Top/Bottom Interval(mm): 560/ 620 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 127.12
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 127.06
LITHOLOGY: APHYRIC BASALT;
MASSIVE;
Piece No. : PCE 7 (56-62);
Texture : APHYRIC;
Structure : MASSIVE, 15-DEGREE DIPPING BLUE-GREEN SMECTITE VEIN
ON TOP;
Comments : COLOR IS GRAY;
Vesicles : Size(mm): Percent: 0.5
Location: Filling: EMPTY, SMEC, CARB
EMPTY (OR BLUE SMECTITE-LINED) OR CARBONATE-
FILLED;
Replacement: CARBONATE
SMECTITE
Leg : 34 Top/Bottom Interval(mm): 640/ 720 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 127.22
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 127.14
LITHOLOGY: BASALT;
MASSIVE;
Piece No. : PCE 8 (64-72);
Texture : FINE-GRAINED;
Structure : MASSIVE, TWO VERTICAL and ONE 40-DEGREE DIPPING
BOTRYOIDAL BLUE-GREEN SMECTITE VEINS;
Comments : COLOR IS DARK GRAY;
Vesicles : Size(mm): TO 1 Percent: 0.5
Location: Filling: EMPTY, SMEC, CARB
EMPTY OR LINED WITH BLUE SMECTITE OR CARBONATE-
FILLED;
Replacement: CARBONATE
SMECTITE
Leg : 34 Top/Bottom Interval(mm): 740/1500 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 128.00
Core: 14 Top of Core Depth (m) : 125.00
Sect: 2 Top of Section Depth(m): 127.24
LITHOLOGY: BASALT;
Piece No. : PCE 9 (74-84), 10 (84-99), 11 (99-124),
12 (124-131), 13 (131-137), 14 (137-150);
Texture : FINE TO MEDIUM-GRAINED, COARSENS SLIGHTLY WITH
DEPTH;
Structure : STEEP TO VERTICAL BRANCHING VEIN AND VEIN SYSTEM
THROUGHOUT (MAY BE SAME VERTICAL VEIN BOUNDING PCES
7&8) UP TO 2MM THICK - DARK GREEN TO BLUISH GREEN,
MINOR CARBONATE IN VEINS THOUGH THIN BRANCHES MAY BE
WHOLLY CARBONATE--CARBONATE VEINS AT 105&127CM ARE
APPARENTLY VERY FINE TO FINE-GRAINED CALCITE
(R.I.<1.530)--THIN CARBONATE-RICH BRANCH AT 87CM IS
CALCITE (R.I.<1.503 and 2V=0);
Comments : CONSISTS OF CONTINUOUS REFITTED PIECES, SAWED
SURFACES OF MINICORES SHOW FEW ORANGE-FILLED HOLES--
HENCE SURFACE HOLES DUE TO PLUCKING DECREASE TO 1%
IN PCE 13, PIECES ARE SEPARATED ALONG RELATIVELY
FLAT BRANCHES--NUMEROUS AT TOP OF PCE 13 and SO THE
PIECE DISINTEGRATED - VEINS THERE ARE DARK GRAY-
GREEN WITH MUCH SULFIDE ON SOME;
Vesicles : Size(mm): TO 1.2 Percent: 1
Location: Filling: CARB
PCES 9-11 (TO 110CM);
Size(mm): Percent: TO1.5
Location: Filling: SMECTITE
BELOW 110CM VESICLES PARTLY OR WHOLLY FILLED WITH
GREEN OR BLUE-GREEN SMECTITE (PLUCKED - LEAVING
SURFACE HOLES) - INCREASE TO 1.5% IN PCE 12
(115-131CM);
Replacement: SULFIDE
SCATTERED CRYSTALS AND PATCHES OF SULFIDE;
CARBONATE
CALCITE
SMECTITE
Leg : 34 Top/Bottom Interval(mm): 0/1450 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 129.45
Core: 14 Top of Core Depth (m) : 125.00
Sect: 3 Top of Section Depth(m): 128.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-15), 2 (15-26), 3 (27-33), 4 (33-52),
5 (52-66), 6 (66-81), 7-9 (81-86), 10 (86-93),
11 (93-100), 12 (100-102), 13 (102-114),
14 (114-120), 15 (122-125), 16 (127-132),
17 (135-142);
Texture : APHYRIC, CONTINUOUS CORE TO 119CM IS MEDIUM TO VERY
COARSE-GRAINED, COARSENS DOWNWARD, PCES 1&2 ARE
MEDIUM-GRAINED, PCES 3&4&6 ARE COARSE-GRAINED, PCE
11 IS COARSE TO VERY COARSE-GRAINED, PCES 12-17 ARE
VERY COARSE-GRAINED;
Structure : SMECTITE VEINS ABUNDANT and OF VARIOUS ORIENTATIONS -
THEY ARE THICK (TO 1.5MM NEAR TOP and THICKER BELOW) &
TEND TO SWELL and CAUSE THE CORE TO BREAK UP (PCE 5 IS
BROKEN UP ALONG VEINS and PCES 7-10 WERE A SINGLE
PIECE ORIGINALLY THAT BROKE ALONG VEINS) - THE BLUE-
GREEN SMECTITE TENDS TO BE BOTRYOIDAL AS IT HAS BEEN
THROUGHOUT CORE 14, CALCITE VEIN AT 111CM DIPS 10
DEGREES;
Alteration : NO BROWN ALTERATION EXCEPT ALONG VEIN AT 13-16CM;
Comments : BELOW 126CM THERE ARE THICK ZONED VEINS UP TO 5-6MM
THICK COMPOSED OF LIGHT TAN LAYERS OF RADIAL
CARBONATE SANDWICHED BETWEEN GREEN SMECTITE ZONES -
LOCALLY THERE MAY BE A TOTAL OF 3 OR 5 OR 7 LAYERS
(MEANING 1 OR 2 OR 3 CARBONATE LAYERS) - SKETCH ON
PCE 17 DESCRIPTION ON SHIPBOARD VISUALS, BASALT
IS DARK GRAY, SMECTITE IS GRAY-GREEN and BLUE-GREEN &
DARK GRAY and GREEN;
Vesicles : Size(mm): TO 1.3 Percent:
Location: Filling: CARB, SMEC, EMPTY
VESICLES TO 1.3MM IN DIAMETER FORM CLUSTERS 4MM
ACROSS, CARBONATE FILLINGS COMMON DOWN TO 119CM--
ESPECIALLY AT 13-15CM and IN PCES 4&6-14, BELOW
119CM CARBONATE FILLINGS DECREASE IN ABUNDANCE
RELATIVE TO SMECTITE FILLINGS and THIS ACCOMPANIES A
GENERAL DECREASE IN ABUNDANCE OF ALL VESICLES &
AMYGDULES TO TRACE AMOUNTS AT BOTTOM OF SECTION,
NEAR TOP CARBONATE AMYGDULES NOTABLY LESS COMMON
NEARER SMECTITE VEINS BUT THEY OCCUR EVERYWHERE
THROUGH MOST OF SECTION (NEAR and FAR FROM VEINS),
OTHER VESICLES ARE SMECTITE-LINED OR FILLED -
ESPECIALLY NEAR SMECTITE VEINS, THE SMECTITE IS
LIGHT BLUE IN AMYGDULES IN PCES 6&11, THE DECREASE
IN VESICLE ABUNDANCE DOWNWARD IN SEC 3 EMPHASIZES
THE LOCAL MAXIMUM OF 1.5% SEEN IN 115-131CM OF SEC
2--WHICH IS THE MAXIMUM CONCENTRATION SEEN IN THE
COOLING UNIT (THE TOP OF WHICH OCCURS AT 19CM IN
SEC 2)--THE REVERSAL IN VESICLE FREQUENCY BELOW
THAT MAXIMUM SUGGESTS THAT WE APPROACH THE LOWER
CONTACT IN SECS 3&4 BUT NEVER QUITE REACH IT, 0.5%
AMYGDULES IN PCE 15 ARE GREEN SMECTITE (MOSTLY) &
CARBONATE;
Replacement: SULFIDE
SCATTERED CRYSTALS AND PATCHES OCCUR IN MINOR
AMOUNT IN UPPER PART OF SECTION and DECREASE
DOWNWARD;
SMECTITE
CARBONATE
CALCITE
Leg : 34 Top/Bottom Interval(mm): 0/ 770 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 130.27
Core: 14 Top of Core Depth (m) : 125.00
Sect: 4 Top of Section Depth(m): 129.50
LITHOLOGY: APHYRIC TO PLAG SPARSELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (0-6), 2 (1-16), 3 (21-35), 4 (35-50),
5 (52-55), 6 (56-67), 7 (69-77);
Texture : APHYRIC TO SPARSELY PHYRIC, VERY COARSE-GRAINED, PCE
7 CONSISTS OF FRAGMENTS;
Structure : MASSIVE, THIS SECTION MUCH LESS FRACTURED THAN THOSE
ABOVE, MOST VEINS ARE STEEP and THOSE IN PCE 6 DIE OUT
WITHIN THE CORE - THIS WAS NOT OBSERVED HIGHER IN
CORE WHERE ALL VEINS WERE PENETRATIVE AND THIS MAY
MARK AN APPROACH TO A COOLING UNIT CONTACT, VEINS IN
2-16CM ARE FLAT TO STEEP ZONED SMECTITE-CARBONATE
VEINS LIKE THOSE IN LOWER PART OF SEC 3 BUT WITH THE
ADDITION OF LIGHT BLUE SPOTS INSIDE THAT RESEMBLE
THE LIGHT BLUE AMYGDULES IN THE HOST ROCK (AND MAY
BE CONTINUOUS WITH WALL ROCK AMYGDULES THAT
INTERSECT THE VEIN WALL), THE MAIN VEIN COMPONENT IS
DARK GRAY-GREEN SMECTITE, BELOW 16CM THE VEINS ARE
STILL DARK GRAY-GREEN SMECTITE BUT ARE UNZONED AND
CONTINUE TO CONTAIN THE BLUE AMYGDULE-LIKE SPOTS--IN
PCE 3 THE SPOTS ARE ZONED GRADATIONALLY INWARD FROM
DARK GREEN TO LIGHT BLUE (LIKE THE AMYGDULES IN THE
HOST ROCK) AND SOME ARE HOLLOW AS IF INCOMPLETELY-
FILLED HOLES, IN PCE 4 THE VEINS ARE UNZONED GREEN
TO GRAY-GREEN SMECTITE ABOUT 0.5MM THICK and DIP 70
DEGREES, IN PCES 5&6 THE VEINS ARE VERY THIN and DARK
GRAY OR GREENISH GRAY SMECTITE WITH BLOTCHES &
MOTTLES OF LIGHT BLUE;
Alteration : THE VEINS DID NOT SWELL MUCH OR SHRINK BUT WERE AT
EQUILIBRIUM WITH PORE FLUIDS and THE ACTIVITY OF THE
WATER DID NOT CHANGE WITH TIME OR ELSE SWELLING &
SHRINKING WOULD HAVE OCCURED AND ACCELERATED
OXIDATION OF VEINS BY FACILITATING CIRCULATION;
Comments : BASALT IS DARK OR MEDIUM GRAY, THE COARSER ROCKS IN
PCES 1&2 ARE A LITTLE LIGHTER THAN THE FINER ONES
HIGHER UP;
Vesicles : Size(mm): TO 1.6 Percent: TO1.5
Location: Filling: CARB, SMEC
VESICLES IN PCES 1&2 MORE ABUNDANT (1-1.5%) THAN
IN BASE OF SEC 3 and MAY MARK A SECOND MAXIMUM IN
THIS COOLING UNIT (ALSO INTERVAL 115-131CM OF SEC
2), THE MAXIMUM SIZE OF THE VESICLES IS 1.6MM
WHICH IS THE LARGEST MAXIMUM SIZE OBSERVED IN CORE
14, BELOW 16CM THE ABUNDANCE OF VESICLES DROPS TO
0.5%, A FEW CARBONATE-FILLED VESICLES OCCUR IN
PCES 1-3 WHICH MAY BE LOCALLY CONCENTRATED IN
CERTAIN AREAS BUT THE GENERAL DECREASE CONTINUES,
NO CARBONATE AMYGDULES IN PCES 4-6, MOST AMYGDULES
AT TOP ARE DARK GRAY-GREEN SMECTITE and A FEW ARE
LIGHT BLUE SMECTITE, IN PCES 3-6 AMYGDULES ARE
EITHER GRADATIONALLY COLOR-ZONED FROM DARK GREEN
OR GRAY-GREEN RIMS TO LIGHT OR MEDIUM BLUE CORES
OR THEY ARE WHOLLY DARK GREEN OR GRAY-GREEN - THE
ZONED ONES INCREASE RELATIVELY DOWNWARD and ARE
DOMINANT IN PCES 5&6 (AND ERRATICALLY DISTRIBUTED
THERE);
Phenocrysts: PLAGIOCLASE
8 PLAG MICROPHENOCRYSTS SEEN IN PCE 4 ARE UP TO
1.8X0.7MM and MAY BE LOCALLY CLUSTERED - THEIR CORES
ARE AN65-72 (X'=1.563- TO 1.566- and Z' ON
(010)=1.567+ TO 1.569+ BY TSUBOI METHOD), TEN
VISIBLY LARGE CRYSTALS IN PCES 5&6 RANGE IN SIZE
FROM 0.6X0.2 TO 2.4X0.6 and 3X0.2MM;
Replacement: CARBONATE ( 0%)
NO VEIN CARBONATE SEEN;
SMECTITE
SULFIDE
VEIN SULFIDE PRESENT AS TRACES AT TOP OF SECTION--
NONE SEEN IN THE BOTTOM OR IN PCES 5&6;
Leg : 34 Top/Bottom Interval(mm): 0/ 0 Analyst: Bass, M.
Hole: 321 Sample Midpoint (m) : 131.10
Core: 14 Top of Core Depth (m) : 125.00
Sect: CC Top of Section Depth(m): 131.10
LITHOLOGY: APHYRIC BASALT;
GLASS;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Comments : SIEVED (+63U) SAMPLE FROM CENTER CAUGHT IN BUCKET
FROM CORE LINER, ALTERED BASALT FRAGMENTS, MAY BE
CAVINGS OR SELVAGE;
Groundmass : GLASS
ONE GLASS FRAGMENT;
Replacement: SMECTITE
MUCH GREEN BENTONITE(?);
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