Leg : 63 Top/Bottom Interval(mm): 170/ 190 Describer: Shibata, T.
Hole: 473 Top of Core Depth(m) : 247.50 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 247.68 Sect/Pc #: 1/PCE 1C
ROCK = PLAG-CPX MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
INTERSERTAL-SUBVARIOLITIC GROUNDMASS*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.7 Morphology: EUHEDRAL
PSEUDOMORPHS?,COMPLETELY ALTERED TO CLAYS +
CALCITE;
PLAGIOCLASE ( 5%)
Size(mm): 0.2-1.0 Morphology: EUHEDRAL-SUBHEDRAL
PHENOS + MICROPHENOS;
CLINOPYROXENE ( 2%)
Size(mm): 0.1-0.7 Morphology: SUBHEDRAL-EQUANT
PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.05-0.1 Morphology: PRISMATIC LATHS,RADIATING
Morphology: LATHS
CLINOPYROXENE ( 10%)
Size(mm): 0.05-0.1 Morphology: ANHEDRAL,EQUANT
OPAQUE MINERALS ( 10%)
Size(mm): 0.01-0.05 Morphology: ANHEDRAL
MESOSTASIS
Alteration - CALCITE ( 2%)
Location: VESICLES Replacing: OL PHENOS
CLAY MINERALS ( 37%)
Location: VESICLES, Replacing: OL PHENOS
Location: MESOSTASIS
Vesicles -
Size(mm): 0.2-0.7
Percent: 4
Filling: CLAY.MIN,
Shape: CIRCULAR-
Filling: CALCITE
Shape: IRREGULAR
CLAY IS BROWNISH*
Leg : 63 Top/Bottom Interval(mm): 880/ 920 Describer: Shibata, T.
Hole: 473 Top of Core Depth(m) : 247.50 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 248.40 Sect/Pc #: 1/PCE 6D
ROCK = DOLERITE;
Texture: INTERGRANULAR-INTERSERTAL*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.5-1.0 Morphology: SUBHEDRAL
PSEUDOMORPHS,COMPLETELY ALTERED TO CLAY + CALCITE*
PLAGIOCLASE ( 40%)
Size(mm): 0.1-1.5 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 25%)
Size(mm): 0.05-0.7 Morphology: ANHEDRAL-EQUANT
OPAQUE MINERALS ( 7%)
Size(mm): 0.05-0.2 Morphology: ANHEDRAL,IRREGULAR
MESOSTASIS
Alteration - CARBONATE ( 3%)
Location: VESICLES Replacing: OL
CLAY MINERALS ( 22%)
Location: VESICLES, Replacing: OL
Location: MESOSTASIS
IN THE INTERSTICES BETWEEN PLAG AND CPX*
Vesicles -
Size(mm): 0.8
Percent: 2
Filling: CLAY.MIN
Shape: CIRCULAR
CLAY IS BROWN*
Leg : 63 Top/Bottom Interval(mm): 590/ 620 Describer: Shibata, T.
Hole: 473 Top of Core Depth(m) : 252.00 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 252.61 Sect/Pc #: 1/PCE 3F
ROCK = DOLERITE;
Texture: INTERSERTAL-SUBOPHITIC*
Groundmass - OLIVINE
PSEUDOMORPHS?;
PLAGIOCLASE ( 40%)
Size(mm): 0.1-2 Morphology: SUBHEDRAL-ANHEDRAL
OPAQUE MINERALS ( 7%)
Size(mm): 0.05-0.2 Morphology: ANHEDRAL
CLINOPYROXENE ( 39%)
Size(mm): 0.1-1 Morphology: ANHEDRAL
Alteration - CARBONATE ( 4%)
IN THE INTERSTICES BETWEEN PLAG AND CPX;
CLAY MINERALS ( 10%)
IN THE INTERSTICES BETWEEN PLAG AND CPX;
ZEOLITE ( TR%)
IN THE INTERSTICES BETWEEN PLAG AND CPX*
Leg : 63 Top/Bottom Interval(mm): 30/ 60 Describer: Shibata, T.
Hole: 473 Top of Core Depth(m) : 252.00 Rock Type: IGNEOUS
Core: 30 Sample Midpoint(m) : 253.55 Sect/Pc #: 2/PCE 1A
ROCK = DOLERITE;
Texture: APHYRIC,INTERGRANULAR-INTERSERTAL*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.1-2 Morphology: SUBHEDRAL
CLINOPYROXENE ( 20%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL,EQUANT
OPAQUE MINERALS ( 5%)
Size(mm): 0.05-0.2 Morphology: ANHEDRAL
Alteration - CARBONATE ( 10%)
Location: VEIN
CLAY MINERALS ( 15%)
IN THE INTERSTICES BETWEEN PLAG AND CPX;
QUARTZ ( 30%)
Location: VEIN
Leg : 63 Top/Bottom Interval(mm): 1160/1200 Describer: Shibata, T.
Hole: 473 Top of Core Depth(m) : 257.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 259.68 Sect/Pc #: 2/PCE 9D
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL-SUBOPHITIC*
Groundmass - OLIVINE
PSEUDOMORPHS?;
PLAGIOCLASE ( 39%)
Size(mm): 0.1-2.0 Morphology: SUBHEDRAL-ANHEDRAL
CLINOPYROXENE ( 38%)
Size(mm): 0.1-1.0 Morphology: ANHEDRAL
OPAQUE MINERALS ( 8%)
Size(mm): 0.05-0.2 Morphology: ANHEDRAL
Alteration - CARBONATE ( TR%)
CLAY MINERALS ( 15%)
IN THE INTERSTICES BETWEEN PLAG AND PYX;
ZEOLITE ( TR%)
IN THE INTERSTICES BETWEEN PLAG AND PYX;
SERPENTINITE ( TR%)
IN THE INTERSTICES BETWEEN PLAG AND PYX*
Leg : 63 Top/Bottom Interval(mm): 20/ 40 Describer: Shibata, T.
Hole: 473 Top of Core Depth(m) : 266.00 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 270.53 Sect/Pc #: 4/PCE 1A
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL-INTERGRANULAR*
Groundmass - OLIVINE
PSEUDOMORPHS?;
PLAGIOCLASE ( 39%)
Size(mm): 0.1-2 Morphology: SUBHEDRAL-ANHEDRAL
CLINOPYROXENE ( 38%)
Size(mm): 0.1-1.5 Morphology: ANHEDRAL
OPAQUE MINERALS ( 8%)
Size(mm): 0.05-0.5 Morphology: ANHEDRAL
Alteration - CARBONATE ( TR%)
IN THE INTERSTICES BETWEEN PLAG AND PYX;
CLAY MINERALS ( 15%)
IN THE INTERSTICES BETWEEN PLAG AND PYX*
Leg : 63 Top/Bottom Interval(mm): 1210/1230 Describer: Shibata, T.
Hole: 473 Top of Core Depth(m) : 275.00 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 276.22 Sect/Pc #: 1/PCE 2G
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL-SUBOPHITIC*
Groundmass - PLAGIOCLASE ( 39%)
Size(mm): 0.1-2 Morphology: SUBHEDRAL-ANHEDRAL
CLINOPYROXENE ( 38%)
Size(mm): 0.1-2 Morphology: SUBHEDRAL-ANHEDRAL
OPAQUE MINERALS ( 8%)
Size(mm): 0.05-0.3 Morphology: ANHEDRAL
Alteration - CARBONATE ( TR%)
IN THE INTERSTICES BETWEEN PLAG AND PYX;
CLAY MINERALS ( 15%)
IN THE INTERSTICES BETWEEN PLAG AND PYX*
Leg : 63 Top/Bottom Interval(mm): 270/ 290 Describer: Shibata, T.
Hole: 473 Top of Core Depth(m) : 284.00 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 287.28 Sect/Pc #: 3/PCE 2
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
HYALOPILITIC*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.5
PSEUDOMORPHS,COMPLETELY ALTERED TO CLAYS;
PLAGIOCLASE ( 7%)
Size(mm): 0.2-1 Morphology: EUHEDRAL
BOTH PHENOS + MICROPHENOS;
CLINOPYROXENE ( 5%)
Size(mm): 0.1-0.5 Morphology: EUHEDRAL-SUBHEDRAL
MOSTLY MICROPHENOS*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): 0.01-0.05 Morphology: SKELETAL
CLINOPYROXENE ( 5%)
Size(mm): 0.01-0.05 Morphology: FEATHERY,SKELETAL
GLASS ( 55%)
DEVITRIFIED;
OPAQUE MINERALS ( 8%)
Size(mm): 0.01 Morphology: ANHEDRAL
Alteration - CLAY MINERALS ( 9%)
Location: VESICLES Replacing: OL PHENOS
ZEOLITE ( 1%)
Location: VESICLES
Vesicles -
Size(mm): 0.1-2
Percent: 10
Filling: CLAY.MIN,
Shape: OVAL
Filling: ZEOLITE
|
