Leg : 92 Top/Bottom Interval(mm): 0/ 770 Analyst: Pearce, J.A.
Hole: 599B Sample Midpoint (m) : 43.07
Core: 3 Top of Core Depth (m) : 40.80
Sect: 2 Top of Section Depth(m): 42.30
LITHOLOGY: BASALT;
Piece No. : PCES 1 (1-11), 2 (14-18), 3 (22-26), 4 (29-37),
5 (39-46), 6 (49-52), 7 (57-64), 8 (66-77);
Texture : ROUNDED UNORIENTED FRAGMENTS OF BASALT RANGING FROM
GLASSY THROUGH APHANITIC TO FINE-GRAINED, PCE 3 IS A
PILLOW FRAGMENT CONTAINING A GLASSY SELVAGE (CA 1MM
FRESH GLASS WITH AN OUTER RIM OF PALAGONITE) WITH AN
INNER SPHERULITIC ZONE, THE OTHER FRAGMENTS CONTAIN
OUTER OXIDATIVE ALTERATION ZONES BUT SHOW NO PILLOW
STRUCTURE;
Structure : PCE 3 HAS THIN VEINS OF ZEOLITE AND CALCITE AND
RADIAL FRACTURES;
Alteration : SLIGHT TO MODERATE
FRAGMENTS (EXCEPT PCE 3) CONTAIN OUTER OXIDATIVE
ALTERATION ZONES CA 1MM, FRESH GLASS (1MM) IN PCE
3;
Comments : GREY TO BROWNISH GREY BASALT, GRAVEL ACCOMPANYING
CORE CONTAINS CA 5% BASALTIC GLASS AND PALAG;
Vesicles :
Location: Filling: SMEC
VESICLES SPARSE AND SMALL AND SOMETIMES FILLED BY
BROWN SMEC;
Phenocrysts: CLINOPYROXENE
CPX COULD BE MICROPHYRIC(?);
Groundmass : CLINOPYROXENE
PLAGIOCLASE
OLIVINE
MAGNETITE
PSEUDOMORPHED OLIVINE AND MAGNETITE;
GLASS
Replacement: PALAGONITE
ZEOLITE
CALCITE
SMECTITE
BROWN;
Leg : 92 Top/Bottom Interval(mm): 0/ 700 Analyst: Goldberg, D.
Hole: 599B Sample Midpoint (m) : 44.50
Core: 4 Top of Core Depth (m) : 43.80
Sect: 1 Top of Section Depth(m): 43.80
LITHOLOGY: APHANITIC TO FINE-GRAINED BASALT;
Piece No. : PCES 1 (4-7), 2 (10-18), 3 (20-23), 4 (25-32),
5 (34-44), 6 (47-51), 7 (54-61), 8 (64-70);
Texture : ROUNDED UNORIENTED FRAGMENTS OF BASALT RANGING FROM
APHANITIC TO FINE-GRAINED, FRAGMENTS IN PCE 5 HAVE
THIN GLASSY RIMS WITH PALAG COATINGS AND MAYBE
PILLOW FRAGMENTS, OTHER PCES CONTAIN OUTER ZONES OF
OXIDATIVE ALTERATION BUT NO APPARENT PILLOW
STRUCTURES, PCES 1+3 SHOW A SPHERULITIC TEXTURE;
Alteration : SLIGHT TO MOD
PCES (EXCEPT PCE 5) CONTAIN OUTER ZONES OF
OXIDATIVE ALTERATION, LESSER DEGREE OF ALTERATION
EXTENDS INTO THE INTERIORS OF THE PCES, PCE 2
CONTAINS 2 TO 3 ZONES OF ALTERATION INSIDE THE
PROMINENT OUTER OXIDIZED ZONE, THE OUTER OXIDIZED
ZONE ON THE PCES IS UP TO 1CM THICK AND A DARKER
GREY OR BROWNISH GREY COMPARED TO THE INTERIORS OF
THE PCES;
Comments : LIGHT GREY TO BROWNISH GREY BASALT;
Vesicles :
Location: Filling: SMEC
VESICLES SPARSE AND SMALL AND MOST ABUNDANT IN
PCES 2+6 AND SOMETIMES FILLED WITH BLUE OR BROWN
SMEC;
Groundmass : PLAGIOCLASE
FORMING SPHERULES IN 1+3;
CLINOPYROXENE
OLIVINE
MAGNETITE
ALTERED AND PSUEDOMORPHED OL AND MAGNETITE;
Replacement: SMECTITE
BLUE OR BROWN;
|
