Leg : 63 Top/Bottom Interval(mm): 1270/1280 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 741.00 Rock Type: IGNEOUS
Core: 79 Sample Midpoint(m) : 742.28 Sect/Pc #: 1/PCE 1E
ROCK = DOLERITE
ALTERED;
Texture: APHYRIC,INTERSERTAL;
Where sampled: CHILLED MARGIN OF SILL*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.2-1.0 Morphology: EUHEDRAL,LATHS
OLIGOCLASE,ALTERED TO ZEOLITE?
OPAQUE MINERALS ( 5%)
Size(mm): 0.05
Alteration - CARBONATE ( 35%)
SMECTITE ( 20%)
IN THE INTERSTICES BETWEEN PLAG LATHS,BROWNISH
GREEN;
ZEOLITE ( 10%)
Replacing: PLAG
IDENTITY QUESTIONABLE*
Leg : 63 Top/Bottom Interval(mm): 400/ 420 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 741.00 Rock Type: IGNEOUS
Core: 79 Sample Midpoint(m) : 742.91 Sect/Pc #: 2/PCE 2
ROCK = DOLERITE
ALTERED;
Texture: APHYRIC,INTERSERTAL*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.5-2 Morphology: EUHEDRAL,LATHS
ALTERED TO ZEOLITES + CLAYS;
OPAQUE MINERALS ( 5%)
Size(mm): 0.1-0.2
Alteration - CARBONATE ( 35%)
SMECTITE ( 25%)
IN THE INTERSTICES BETWEEN PLAG LATHS,BROWNISH
GREEN;
ZEOLITE ( 15%)
Replacing: PLAG
Leg : 63 Top/Bottom Interval(mm): 550/ 580 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 750.50 Rock Type: IGNEOUS
Core: 80 Sample Midpoint(m) : 751.07 Sect/Pc #: 1/PCE 4D
ROCK = DOLERITE
ALTERED;
Texture: APHYRIC,INTERSERTAL*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
LABRADORITE;
CLINOPYROXENE ( 15%)
Size(mm): 0.5-3 Morphology: ANHEDRAL
OPAQUE MINERALS ( 7%)
Size(mm): 0.2-1
Alteration - CARBONATE ( 3%)
SMECTITE ( 30%)
Replacing: PYX
IN THE INTERSTICES BETWEEN PLAG LATHS,BROWNISH
GREEN;
ZEOLITE
QUESTIONABLE*
Leg : 63 Top/Bottom Interval(mm): 1050/1090 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 750.50 Rock Type: UNIDENTIFIED
Core: 80 Sample Midpoint(m) : 751.57 Sect/Pc #: 1/PCE 7D
ROCK = DOLERITIC BRECCIA
CONSISTS OF LITHIC FRAGMENTS OF DOLERITE (60%/
<15 MM/ANGULAR/HIGHLY ALTERED TO CLAY) AND CLAYEY
CHERT (30%/<10 MM/ANGULAR-SUBANGULAR) IN THE
MATRIX (10%/MADE UP OF CLAY + ZEOLITE + MICA);
Texture: CLASTIC*
Alteration - CLAY MINERALS
Replacing: MATRIX
ZEOLITE
Replacing: MATRIX
MICA
Replacing: MATRIX
WHITE MICA*
Leg : 63 Top/Bottom Interval(mm): 1020/1050 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 750.50 Rock Type: IGNEOUS
Core: 80 Sample Midpoint(m) : 753.03 Sect/Pc #: 2/PCE 6G
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): 1-2 Morphology: SUBHEDRAL LATHS
PARTLY ALTERED TO ZEOLITES + CLAY;
CLINOPYROXENE ( 5%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
OPAQUE MINERALS ( 7%)
Size(mm): 0.2-1 Morphology: ANHEDRAL,IRREGULAR
Alteration - CARBONATE ( 10%)
Location: VEIN
CLAY MINERALS ( 30%)
Location: VEIN Replacing: PLAG,CPX
POSSIBLY IN THE INTERSTICES BETWEEN PRIMARY MINS;
ZEOLITE ( 3%)
Location: VEIN Replacing: PLAG,CPX
POSSIBLY IN THE INTERSTICES BETWEEN PRIMARY MINS;
MICA ( TR%)
Location: VEIN Replacing: PLAG,CPX
WHITE MICA,POSSIBLY IN THE INTERSTICES BETWEEN
PRIMARY MINS*
Leg : 63 Top/Bottom Interval(mm): 210/ 240 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 750.50 Rock Type: UNIDENTIFIED
Core: 80 Sample Midpoint(m) : 753.73 Sect/Pc #: 3/PCE 3A
ROCK = DOLERITIC BRECCIA AND DOLERITE
BRECCIA CONSISTS OF LITHIC FRAGMENTS OF ALTERED
DOLERITE (30%/<10 MM/SUBANGULAR);
Texture: APHYRIC,INTERSERTAL,CLASTIC;
Where sampled: BOUNDARY BETWEEN DOLERITE AND DOLERITIC BRECCIA*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 1-3 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( TR%)
OPAQUE MINERALS ( 2%)
Alteration - CLAY MINERALS ( 41%)
Location: MATRIX Replacing: PLAG,CPX
ZEOLITE ( 7%)
Location: VEINS Replacing: PLAG
Leg : 63 Top/Bottom Interval(mm): 1330/1350 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 750.50 Rock Type: IGNEOUS
Core: 80 Sample Midpoint(m) : 754.84 Sect/Pc #: 3/PCE 9
ROCK = DOLERITE
ALTERED;
Texture: APHYRIC,INTERSERTAL*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): 1-3 Morphology: SUBHEDRAL
OSCILLATORY ZONING;
CLINOPYROXENE ( TR%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL
OPAQUE MINERALS ( 5%)
Alteration - SMECTITE ( 46%)
Replacing: PYX,PLAG
BROWNISH GREEN SMEC;
ZEOLITE ( 4%)
IN THE INTERSTICES BETWEEN PRIMARY PHASES*
Leg : 63 Top/Bottom Interval(mm): 730/ 760 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 760.00 Rock Type: IGNEOUS
Core: 81 Sample Midpoint(m) : 762.24 Sect/Pc #: 2/PCE 7
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL*
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
CLINOPYROXENE ( 30%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
SPHENE ( 1%)
OPAQUE MINERALS ( 2%)
Alteration - CLAY MINERALS ( 32%)
Replacing: PLAG,CPX
ZEOLITE ( 20%)
Replacing: PLAG
Leg : 63 Top/Bottom Interval(mm): 200/ 240 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 760.00 Rock Type: IGNEOUS
Core: 81 Sample Midpoint(m) : 764.72 Sect/Pc #: 4/PCE 2
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL,SUBOPHITIC*
Groundmass - PLAGIOCLASE ( 15%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
CLINOPYROXENE ( 35%)
Size(mm): 0.5-3.5 Morphology: ANHEDRAL
OPAQUE MINERALS ( 5%)
SPHENE ( TR%)
Alteration - SMECTITE ( 30%)
Replacing: PLAG,PYX
BROWNISH GREEN SMEC;
ZEOLITE ( 15%)
Replacing: PLAG
Leg : 63 Top/Bottom Interval(mm): 650/ 680 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 769.00 Rock Type: UNIDENTIFIED
Core: 82 Sample Midpoint(m) : 769.67 Sect/Pc #: 1/PCE 6A
ROCK = APHYRIC BASALT
DIABASE(BASALTIC?)BRECCIA;
Texture: APHYRIC,HYALOOPHITIC,CLASTIC*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): 0.02-0.1 Morphology: PRISMATIC
CLINOPYROXENE ( 10%)
Size(mm): 0.05-0.2 Morphology: PRISMATIC
GLASS ( 60%)
Size(mm): <10 Morphology: ANGULAR-SUBANGULAR
ALTERED CRYPTOCRYSTALLINE FRAGMENTS;
OPAQUE MINERALS ( 4%)
Size(mm): 0.05-0.1
Alteration - CLAY MINERALS ( 11%)
GREEN;
ZEOLITE ( 5%)
Replacing: PLAG,GROUNDMASS
IDENTITY UNCERTAIN FOR ZEOLITE*
Leg : 63 Top/Bottom Interval(mm): 1240/1270 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 769.00 Rock Type: IGNEOUS
Core: 82 Sample Midpoint(m) : 770.26 Sect/Pc #: 1/PCE 9
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
CLINOPYROXENE ( 30%)
Size(mm): 0.5-3.5 Morphology: SUBHEDRAL
OPAQUE MINERALS ( 5%)
SPHENE ( TR%)
Alteration - CLAY MINERALS ( 30%)
Replacing: PLAG,CPX
ALSO IN THE INTERSTICES BETWEEN PRIMARY MINS;
ZEOLITE ( 10%)
Replacing: PLAG,CPX
ALSO IN THE INTERSTICES BETWEEN PRIMARY MINS*
Leg : 63 Top/Bottom Interval(mm): 1320/1330 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 778.00 Rock Type: IGNEOUS
Core: 83 Sample Midpoint(m) : 780.83 Sect/Pc #: 2/PCE 5D
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL,CLASTIC*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.5-3.5 Morphology: SUBHEDRAL
CLINOPYROXENE ( 3%)
Size(mm): 0.5-1 Morphology: ANHEDRAL
OPAQUE MINERALS ( 5%)
Size(mm): 0.2-0.5
SPHENE ( TR%)
PLAGIOCLASE ( 40%)
Size(mm): 0.1-0.7 Morphology: ANGULAR-SUBANGULAR
XTL FRAGMENTS*
Alteration - CARBONATE ( TR%)
CLAY MINERALS ( 32%)
Location: MATRIX Replacing: PLAG,CPX
ALSO IN THE INTERSTICES BETWEEN PRIMARY PHASES;
ZEOLITE
IDENTITY QUESTIONABLE*
Leg : 63 Top/Bottom Interval(mm): 290/ 330 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 778.00 Rock Type: UNIDENTIFIED
Core: 83 Sample Midpoint(m) : 781.31 Sect/Pc #: 3/PCE 3B
ROCK = DOLERITIC BRECCIA;
Texture: APHYRIC,CLASTIC*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): 0.1-1.0 Morphology: SUBANGULAR
XTL FRAGMENTS;
CLINOPYROXENE ( TR%)
Size(mm): 0.2-1.0 Morphology: SUBANGULAR
XTL FRAGMENTS;
OPAQUE MINERALS ( 4%)
Size(mm): 0.5-1.0
SPHENE ( 2%)
MATRIX ( 14%)
Alteration - CARBONATE ( 3%)
CLAY MINERALS ( 10%)
Vesicles -
Size(mm): 0.5-2
Percent: 15
Shape: IRREGULAR
Leg : 63 Top/Bottom Interval(mm): 1020/1060 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 787.00 Rock Type: IGNEOUS
Core: 84 Sample Midpoint(m) : 788.04 Sect/Pc #: 1/PCE 6F
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL*
Groundmass - PLAGIOCLASE ( 32%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL
CLINOPYROXENE ( 15%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL-ANHEDRAL
BIOTITE ( TR%)
Size(mm): 0.1-0.2 Morphology: PLATY
BROWNISH-DARK GREENISH;
AMPHIBOLE ( TR%)
Size(mm): 0.05-0.1 Morphology: ACICULAR,PRISMATIC
COLORLESS;
QUARTZ ( 3%)
Size(mm): 0.1-0.2 Morphology: ANHEDRAL
OPAQUE MINERALS ( 15%)
Size(mm): 0.5-1.5 Morphology: ANHEDRAL
SPHENE ( 1%)
Size(mm): 0.05 Morphology: ANHEDRAL
Alteration - CARBONATE ( 4%)
Replacing: PLAG,PYX
ALSO IN THE INTERSTICES BETWEEN PRIMARY MINS;
CLAY MINERALS ( 30%)
Replacing: PLAG,PYX
ALSO IN THE INTERSTICES BETWEEN PRIMARY MINS*
Leg : 63 Top/Bottom Interval(mm): 530/ 560 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 787.00 Rock Type: IGNEOUS
Core: 84 Sample Midpoint(m) : 789.05 Sect/Pc #: 2/PCE 3B
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.5-4 Morphology: SUBHEDRAL
CLINOPYROXENE ( 10%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL-ANHEDRAL
BIOTITE ( TR%)
Size(mm): 0.5 Morphology: PLATY
BROWNISH-DEEP GREENISH;
AMPHIBOLE ( 1%)
Size(mm): 0.05-0.1 Morphology: ACICULAR,PRISMATIC
COLORLESS;
QUARTZ ( 3%)
Size(mm): 0.1-0.2 Morphology: ANHEDRAL
ALKALI FELDSPAR ( 5%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
IDENTITY UNCERTAIN;
OPAQUE MINERALS ( 20%)
Size(mm): 0.1-1 Morphology: ANHEDRAL
SPHENE ( 1%)
Size(mm): 0.05
Alteration - CARBONATE ( TR%)
CLAY MINERALS ( 25%)
Replacing: PLAG,PYX
ALSO IN THE INTERSTICES BETWEEN PRIMARY MINS;
ZEOLITE ( TR%)
Replacing: PLAG,PYX
IDENTITY QUESTIONABLE,ALSO IN THE INTERSTICES
BETWEEN PRIMARY MINS*
Leg : 63 Top/Bottom Interval(mm): 00/ 40 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 796.00 Rock Type: IGNEOUS
Core: 85 Sample Midpoint(m) : 797.52 Sect/Pc #: 2/PCE 1A
ROCK = DOLERITE;
Texture: APHYRIC,SUBOPHITIC-INTERSERTAL*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 1-4 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 35%)
Size(mm): 1-5 Morphology: ANHEDRAL
BIOTITE ( TR%)
Size(mm): 0.1 Morphology: PLATY
BROWNISH;
AMPHIBOLE ( TR%)
Morphology: PRISMATIC
COLORLESS;
QUARTZ ( 1%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL
ALKALI FELDSPAR ( 3%)
Size(mm): 0.2-1 Morphology: ANHEDRAL
OPAQUE MINERALS ( 4%)
Size(mm): 0.2-1 Morphology: ANHEDRAL
APATITE ( TR%)
Size(mm): 0.02-0.07 Morphology: EQUANT
Alteration - CARBONATE ( 2%)
Replacing: PLAG,CPX,KSPAR
ALSO IN THE INTERSTICES BETWEEN PRIMARY PHASES;
CLAY MINERALS ( 15%)
Replacing: PLAG,CPX,KSPAR
ALSO IN THE INTERSTICES BETWEEN PRIMARY PHASES*
Leg : 63 Top/Bottom Interval(mm): 570/ 600 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 805.00 Rock Type: IGNEOUS
Core: 86 Sample Midpoint(m) : 805.59 Sect/Pc #: 1/PCE 4C
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL-SUBOPHITIC*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.5-2 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 35%)
Size(mm): 0.5-2 Morphology: ANHEDRAL
GREENISH TINT AT MARGIN;
BIOTITE ( TR%)
Size(mm): 0.1-0.5 Morphology: PLATY
QUARTZ ( 1%)
Size(mm): 0.1-0.2 Morphology: ANHEDRAL
ALKALI FELDSPAR ( 5%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL
OPAQUE MINERALS ( 4%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
APATITE ( TR%)
Morphology: EQUANT
Alteration - CARBONATE ( TR%)
Replacing: PLAG,CPX
ALSO IN THE INTERSTICES BETWEEN PRIMARY PHASES;
CLAY MINERALS
Replacing: PLAG,CPX
ALSO IN THE INTERSTICES BETWEEN PRIMARY PHASES*
Leg : 63 Top/Bottom Interval(mm): 1130/1170 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 807.00 Rock Type: IGNEOUS
Core: 87 Sample Midpoint(m) : 808.15 Sect/Pc #: 1/PCE 1F
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL-SUBOPHITIC*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.5-2 Morphology: EUHEDRAL
CLINOPYROXENE ( 35%)
Size(mm): 0.5-2 Morphology: ANHEDRAL
GREENISH TINT AT RIMS;
BIOTITE ( 1%)
Size(mm): 0.2-0.5 Morphology: PLATY
AMPHIBOLE ( TR%)
Size(mm): 0.05-0.1
BROWN HORNBLENDE;
QUARTZ ( 2%)
Size(mm): 0.1-0.2 Morphology: ANHEDRAL
OPAQUE MINERALS ( 5%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
Alteration - CLAY MINERALS ( 17%)
Replacing: PLAG,CPX
ALSO IN THE INTERSTICES BETWEEN PRIMARY PHASES*
Leg : 63 Top/Bottom Interval(mm): 830/ 860 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 807.00 Rock Type: IGNEOUS
Core: 87 Sample Midpoint(m) : 810.85 Sect/Pc #: 3/PCE 1H
ROCK = DOLERITE;
Texture: APHYRIC,INTERSERTAL-SUBOPHITIC*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.5-3 Morphology: EUHEDRAL-SUBHEDRAL
CLINOPYROXENE ( 25%)
Size(mm): 0.5-5 Morphology: ANHEDRAL
BIOTITE ( 10%)
Size(mm): 0.3-0.5 Morphology: PLATY
BROWN-DARK GREEN;
OPAQUE MINERALS ( 4%)
Size(mm): 0.1-0.5
Alteration - CLAY MINERALS ( 20%)
IN THE INTERSTICES BETWEEN PRIMARY MINS;
ZEOLITE ( 1%)
Location: VEIN
IDENTITY QUESTIONABLE*
Leg : 63 Top/Bottom Interval(mm): 890/ 920 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 814.00 Rock Type: IGNEOUS
Core: 88 Sample Midpoint(m) : 816.41 Sect/Pc #: 2/PCE 2A
ROCK = DOLERITE
ALTERED;
Texture: APHYRIC,INTERSERTAL-SUBOPHITIC*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL
CLINOPYROXENE ( 30%)
Size(mm): 0.5-3.5 Morphology: ANHEDRAL
BIOTITE ( 7%)
Size(mm): 0.1-0.5
BROWNISH-DARK GREENISH;
AMPHIBOLE ( TR%)
Size(mm): 0.02-0.1 Morphology: PRISMATIC
COLORLESS;
OPAQUE MINERALS ( 4%)
Size(mm): 0.05-0.1
Alteration - CARBONATE ( 2%)
Location: VEIN
CLAY MINERALS ( 21%)
IN THE INTERSTICES BETWEEN PRIMARY MINS,DARK
BROWNISH;
ZEOLITE ( 1%)
Location: VEIN
Leg : 63 Top/Bottom Interval(mm): 870/ 910 Describer: Shibata, T.
Hole: 471 Top of Core Depth(m) : 814.00 Rock Type: IGNEOUS
Core: 88 Sample Midpoint(m) : 817.89 Sect/Pc #: 3/PCE 1I
ROCK = DOLORITE
ALTERED;
Texture: APHYRIC,INTERSERTAL-SUBOPHITIC*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL
CLINOPYROXENE ( 30%)
Size(mm): 0.5-3.5 Morphology: ANHEDRAL
BIOTITE ( 7%)
Size(mm): 0.1-0.5 Morphology: PLATY
BROWNISH-DARK GREENISH;
AMPHIBOLE ( TR%)
Size(mm): 0.02-0.1
OPAQUE MINERALS ( 4%)
Size(mm): 0.05-0.2
Alteration - CLAY MINERALS ( 17%)
IN THE INTERSTICES BETWEEN PRIMARY MINS;
ZEOLITE ( 1%)
IN THE INTERSTICES BETWEEN PRIMARY MINS*
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