Leg : 60 Top/Bottom Interval(mm): 450/ 470 Describer: Sharaskin, A.
Hole: 456 Top of Core Depth(m) : 133.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 133.96 Sect/Pc #: 1/PCE 7A
ROCK = APHYRIC BASALT
OBSERVER CALLED THIS A METABASALT,EXTENSIVELY
ALTERED;
Texture: ORIGINALLY INTERSERTAL TO SUBOPHITIC*
Groundmass - PLAGIOCLASE
Size(mm): 0.2-0.3
APPROX COMP AN60,RELICTS,LARGE PLAG LATHS
PRESERVED ONLY,ALL OTHER GROUNDMASS TOTALLY
ALTERED*
Alteration - CLAY MINERALS ( 60%)
Location: VESICLES AND Replacing: EVERYTHING BUT LARGE PLAG
Location: GROUNDMASS Replacing: LATHS
CARBONATE ( 24%)
Location: VESICLES AND Replacing: EVERYTHING BUT LARGE PLAG
Location: GROUNDMASS Replacing: LATHS
CHLORITE ( 8%)
Location: VESICLES AND Replacing: EVERYTHING BUT LARGE PLAG
Location: GROUNDMASS Replacing: LATHS
PYRITE ( 1%)
Location: VESICLES AND Replacing: EVERYTHING BUT LARGE PLAG
Location: GROUNDMASS Replacing: LATHS
Vesicles -
Size(mm): 0.5-5
Percent: 7
Location: SCATTERED
Filling: CARB,CLAY,
Shape: IRREGULAR
Filling: PYRITE,CHLOR
CLAY COULD BE SMECTITE*
Leg : 60 Top/Bottom Interval(mm): 1460/1480 Describer: Sharaskin, A.
Hole: 456 Top of Core Depth(m) : 133.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 134.97 Sect/Pc #: 1/PCE 16
ROCK = PLAG SPARSELY PHYRIC BASALT
OBSERVER CALLED THIS A META-PILLOW BASALT,
EXTENSIVELY ALTERED;
Texture: ORIGINALLY SPARSELY PHYRIC
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 0.5-2 Morphology: ROUNDED GRAINS + TABULAR XTLS
APPROX COMP LABRADOR*
Groundmass - PLAGIOCLASE
RELICTS OF PLAG LATHS + MICROLITES IN TOTALLY
ALTERED GROUNDMASS WITH VARIOLITIC AND SPHERULITIC
STRUCTURES*
Alteration - COMBINATION ( 95%)
Location: VESICLES+ALL Replacing: EVERYTHING BUT PLAG LATHS
Location: GROUNDMASS Replacing: AND MICROLITES
INCLUDES CARB + CLAY.MINS + ZEOLITES + QUARTZ +
PYRITE + ALBITE + ACTINO + PUMPELLY,ID OF LAST
THREE UNCERTAIN*
Vesicles -
Size(mm): 0.2-1.5
Percent: 2
Location: SCATTERED
Filling: CALCITE,PYRITE,
Shape: IRREGULAR
Filling: CLAY,QUARTZ
Leg : 60 Top/Bottom Interval(mm): 920/ 960 Describer: Sharaskin, A.
Hole: 456 Top of Core Depth(m) : 133.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 135.94 Sect/Pc #: 2/PCE 10B
ROCK = APHYRIC BASALT
OBSERVER CALLED THIS A METABASALT,EXTENSIVELY
ALTERED;
Texture: ORIGINALLY INTERSERTAL TO SUBOPHITIC,APHYRIC*
Groundmass - GLASS ( 45%)
BADLY ALTERED;
CLINOPYROXENE ( 25%)
BADLY ALTERED;
PLAGIOCLASE ( 18%)
MAGNETITE ( 2%)
Alteration - COMBINATION ( 80%)
Location: THROUGHOUT Replacing: GLASSY MATERIAL,PYROXENE,
Replacing: SOME PLAG
INCLUDES CARB + CLAY.MINS + QUARTZ + PYRITE +
ALBITE + ZEOLITES,ID OF ZEOLITES UNCERTAIN*
Vesicles -
Size(mm): 0.05-0.5
Percent: 10
Location: SCATTERED
Filling: CARB,CLAY,
Shape: ROUND TO
Filling: PYRITE,QUARTZ
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 950/ 970 Describer: Sharaskin, A.
Hole: 456 Top of Core Depth(m) : 143.00 Rock Type: METAMORPHIC
Core: 17 Sample Midpoint(m) : 143.96 Sect/Pc #: 1/PCE 15
ROCK = APHYRIC BASALT
EXTENSIVELY ALTERED PILLOW BASALTS,OBSERVER CALLED
IT A METABASALT,IRREGULAR INTENSITY OF ALTERATION;
Texture: ORIGINALLY SPHERULITIC TO SUBOPHITIC,APHYRIC*
Groundmass - PLAGIOCLASE
Size(mm): TO 0.3 Morphology: LATHS,MICROLITES
RELICT PLAG IN TOTALLY ALTERED GROUNDMASS,COMP
UNCERTAIN*
Alteration - CLAY MINERALS ( 65%)
Location: VESICLES AND Replacing: MOSTLY PYROXENE AND
Location: GROUNDMASS Replacing: INTERSTITIAL MATERIAL,ALSO
Replacing: SOME PLAG
PYRITE ( 17%)
Location: VESICLES AND Replacing: PYX,PLAG AND INTERSTITIAL
Location: GROUNDMASS Replacing: MATERIAL
CARBONATE ( 2%)
Location: VESICLES AND Replacing: PYX,PLAG AND INTERSTITIAL
Location: GROUNDMASS Replacing: MATERIAL
QUARTZ ( 1%)
Location: VESICLES AND Replacing: PYX,PLAG AND INTERSTITIAL
Location: GROUNDMASS Replacing: MATERIAL
Vesicles -
Size(mm): TO 4
Percent: 15
Location: SCATTERED
Filling: CARB,CHLORITE,
Shape: ROUND TO
Filling: SMEC,QUARTZ
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 500/ 530 Describer: Sharaskin, A.
Hole: 456 Top of Core Depth(m) : 152.50 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 153.01 Sect/Pc #: 1/PCE 5
ROCK = APHYRIC BASALT
EXTENSIVELY ALTERED,MUCH OXIDATIVE ALTERATION;
Texture: APHYRIC,SUBOPHITIC TO INTERSTITIAL*
Groundmass - CLINOPYROXENE ( 35%)
Size(mm): 0.05-0.5
APPROX COMP AUG.;
PLAGIOCLASE ( 28%)
Size(mm): 0.2-1
APPROX COMP AN60(?);
GLASS ( 7%)
ALTERED*
Alteration - CARBONATE ( 18%)
Location: VESICLES AND Replacing: GLASSY MATERIAL
Location: GROUNDMASS
CLAY MINERALS ( 12%)
Location: VESICLES AND Replacing: GLASSY MATERIAL
Location: GROUNDMASS
Vesicles -
Size(mm): 0.05-0.8
Percent: 30
Location: SCATTERED
Filling: CARBONATE
Shape: IRREGULAR
Leg : 60 Top/Bottom Interval(mm): 210/ 220 Describer: Sharaskin, A.
Hole: 456 Top of Core Depth(m) : 161.50 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 161.72 Sect/Pc #: 1/PCE 3
ROCK = APHYRIC BASALT
MODERATELY ALTERED,FINE-GRAINED;
Texture: APHYRIC,INTERSERTAL;
Where sampled: SEPARATE PIECE*
Groundmass - CLINOPYROXENE ( 31%)
Size(mm): TO 0.7
PLAGIOCLASE ( 27%)
Size(mm): TO 1
APPROX COMP AN65;
GLASS ( 27%)
DEVITRIFIED;
OLIVINE ( 3%)
Size(mm): 0.2-0.5
APPROX COMP FO85;
MAGNETITE ( 2%)
NEEDLELIKE CRYSTALLITES WITHIN THE GLASS*
Alteration - SMECTITE ( 9%)
Location: VESICLES AND Replacing: GLASSY MATERIAL
Location: GROUNDMASS
SOME FE-OXIDES;
IDDINGSITE ( 1%)
Replacing: OLIVINE
Vesicles -
Size(mm): 0.03-3
Percent: 10
Location: SCATTERED
Filling: PARTLY BY SMEC
Shape: ROUND TO
Shape: IRREGULAR
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