Leg : 29 Top/Bottom Interval(mm): 730/1500 Analyst: Andrews, P.
Hole: 280A Sample Midpoint (m) : 520.50
Core: 23 Top of Core Depth (m) : 519.00
Sect: 1 Top of Section Depth(m): 519.73
LITHOLOGY: BASALT (THOLEIITIC);
Structure : WHITE AND GREEN VEINS ILLUSTRATED ON THE GRAPHIC
REPRESENTATION OF THE VISUAL CORE DESCRIPTION;
Comments : MANGANESE NODULE FROM SEAFLOOR, FOR MORE INFORMATION
SEE THE CORE FORM AND LITHOLOGIC DESCRIPTION
FROM THE INITIAL REPORTS;
Leg : 29 Top/Bottom Interval(mm): 0/1450 Analyst: Andrews, P.
Hole: 280A Sample Midpoint (m) : 521.95
Core: 23 Top of Core Depth (m) : 519.00
Sect: 2 Top of Section Depth(m): 520.50
LITHOLOGY: BASALT (THOLEIITIC);
Structure : VEINS HAVE CALCITE/SERPENTINE PLUS AND/OR PYRITE,
CLOSELY SPACED VERY FINE VEINING WHERE ROCK IS
FRESHLY ALTERED;
Alteration : CLOSELY SPACED VERY FINE VEINING WHERE ROCK IS
FRESHLY ALTERED (ESPECIALLY IN LOWER 20 CM +
POSSIBLY HIGHLY SERPENTINIZED);
Comments : GREENISH BLACK (5 GY 2/1) WITH PALER TOWARDS LOWER
MARGIN, AT 136 CM COLOR - GREENISH GREY (5 GY 6/1),
FOR MORE INFORMATION SEE CORE FORM AND LITHOLOGIC
DESCRIPTION IN THE INITIAL REPORTS;
Replacement: CALCITE
SERPENTINITE
PYRITE
CALCITE/SERP AND/OR PYRITE IN VEINS;
Leg : 29 Top/Bottom Interval(mm): 0/1500 Analyst: Andrews, P.
Hole: 280A Sample Midpoint (m) : 523.50
Core: 23 Top of Core Depth (m) : 519.00
Sect: 3 Top of Section Depth(m): 522.00
LITHOLOGY: SEDIMENT (SILTSTONE);
Leg : 29 Top/Bottom Interval(mm): 0/1500 Analyst: Andrews, P.
Hole: 280A Sample Midpoint (m) : 523.50
Core: 23 Top of Core Depth (m) : 519.00
Sect: 3 Top of Section Depth(m): 522.00
LITHOLOGY: BASALT;
Texture : VERY FINE GRAINED BASALT IN INTERVAL (55-110 CM);
Structure : BELOW 110 CM OLIVE GREY STONE LITHIFIED AND
LARGELY MASSIVE - THE SANDY SILTSTONE HAS CALCITE
VEINS, BELOW 110 CM GREYISH OLIVE STONE IS VERY
FINE CRINKLE-VEINED, SEE INITIAL REPORTS FOR
ADDITIONAL INFORMATION;
Alteration : INTERVAL (10-55 CM) HAS ALTERED ZONE WHICH IS
HIGHLY VEINED (CLOSE-SPACED SMALL VEINS) + HAS
MINERALIZED AND ALTERED CLAYEY SILTSTONE, BELOW
MARGIN AT 55 CM IS HIGHLY ALTERED VERY FINE
GRAINED BASALT - INTERVAL (55-110 CM), IMMEDIATELY
BELOW CONTACT AT 110 CM SILTY CLAYSTONE IS
PYRITIZED AND CHERTIFIED;
Comments : INTERVAL (0-10 CM) IS OLIVE BLACK (5 Y 2/1)
LITHIFIED + CALCITE-MINERALIZED MICA-QTZ SANDY
SILTSTONE, INTERVAL (10-55 CM) IS LIGHT OLIVE GREY
(5 Y 5/1) AT TOP DARKENING TO GREYISH OLIVE AT 37
CM, MARGIN OCCURS AT 55 CM, INTERVAL (55-110 CM) HAS
GREENISH BLACK (5 GY 2/1) BASALT - SIMILAR TO
CORE 23 SECTION 1, SHARP CONTACT OCCURS AT 110 CM,
INTERVAL (110-150 CM) IS VERY LIGHT GREY AT TOP
15 CM GRADING TO OLIVE GREY (5 Y 3/2) AT 130 CM
THEN IS GREYISH OLIVE (10 Y 4/2) OVER THE LOWER
15 CM, INTERVAL (110-150 CM) LIGHT GREY QTZ-CLAY
MINERAL - SILTY CLAYSTONE, SANDY SILTSTONE IS
LITHIFIED INTERVAL (110-150 CM), FOR ADDITIONAL
INFORMATION SEE CORE FORM AND LITHOLOGIC DESCRIPTION
IN THE INITIAL REPORTS;
Replacement: QUARTZ
CLAY
CALCITE
CALCITE VEINS;
PYRITE
Leg : 29 Top/Bottom Interval(mm): 0/ 370 Analyst: Andrews, P.
Hole: 280A Sample Midpoint (m) : 523.87
Core: 23 Top of Core Depth (m) : 519.00
Sect: 4 Top of Section Depth(m): 523.50
LITHOLOGY: SEDIMENT (SILTSTONE);
Leg : 29 Top/Bottom Interval(mm): 0/ 370 Analyst: Andrews, P.
Hole: 280A Sample Midpoint (m) : 523.87
Core: 23 Top of Core Depth (m) : 519.00
Sect: 4 Top of Section Depth(m): 523.50
LITHOLOGY: SEDIMENT (CLAYSTONE);
Structure : VERY FINE CRINKLE VEINS (0-10 CM), SERPENTINIZED
VEINS ALSO (0-10 CM), INTERVAL (10-37 CM) HAS
PYRITIZED VEINS OF CALCITE THROUGHOUT + PART IS
CHERTIFIED + WITH PYRITE - CALCITE VEINS;
Alteration : PYRITIZED VEINS + SOME CHERTIFICATION;
Comments : INTERVAL (0-5 CM) IS GREYISH OLIVE (10 Y 4/2)
LITHIFIED, INTERVAL (5-10 CM) IS OLIVE GREY
(5 Y 3/2) LITHIFIED SANDY SILTSTONE, INTERVAL
(10-37 CM) IS GRAY (5 Y 6/1) TO VERY LIGHT GREY
QTZ-CLAY MINERAL SILTY CLAYSTONE, MARGIN AT 34 CM,
SEE INITIAL REPORTS FOR ADDITIONAL INFORMATION;
Replacement: QUARTZ
CLAY
CALCITE
PYRITE
CALCITE AND PYRITE IN VEINS;
Leg : 29 Top/Bottom Interval(mm): 370/1400 Analyst: Andrews, P.
Hole: 280A Sample Midpoint (m) : 524.90
Core: 23 Top of Core Depth (m) : 519.00
Sect: 4 Top of Section Depth(m): 523.87
LITHOLOGY: BASALT (THOLEIITIC);
Texture : SUBOPHITIC - HOLOCRYSTALLINE;
Structure : CLOSE SPACED VERY FINE VEINS OF CALCITE AND
SERPENTINE GROUP MINERALS NEAR TOP WITH WIDER
SPACING LOWER IN SECTION;
Comments : MARGIN AT 34 CM, GREENISH BLACK (5 GY 2/1), SEE
CORE FORM + LITHOLOGIC DESCRIPTION IN THE INITIAL
REPORTS FOR MORE INFORMATION;
Replacement: CALCITE
SERPENTINITE
Leg : 29 Top/Bottom Interval(mm): 1400/1500 Analyst: Andrews, P.
Hole: 280A Sample Midpoint (m) : 525.00
Core: 23 Top of Core Depth (m) : 519.00
Sect: 4 Top of Section Depth(m): 524.90
LITHOLOGY: OLIVINE BASALT;
Texture : OLIVINE SUBHEDRAL CRYSTALS (0.5 - 14 MM), TEXTURE
SIMILAR TO BASALT IN CORE 23 SECTION 1;
Structure : SERPENTINIZED VEINS;
Phenocrysts: OLIVINE
Size(mm): 0.5-14
OL CRYSTALS SUBHEDRAL (0.5 - 14 MM);
Replacement: SERPENTINITE
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