Leg : 16 Top/Bottom Interval(mm): 200/ 0 Describer: Yeats, R.S.
Hole: 163 Top of Core Depth(m) : 276.00 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 276.20 Sect/Pc #: 1/
ROCK = BASALT
SOURCE IS IR*
Groundmass - OLIVINE
Size(mm): .2-.4
COMPLETELY ALTERED BY CARBONATE+SERPENTINE;
PYROXENE
INCIPIENT;
PLAGIOCLASE
Size(mm): .1-1 Morphology: EUHEDRAL
APPROX COMP AN64,NARROW NORMAL ZONES*
Alteration - CALCITE
Location: VEINS,VUGS Replacing: OL
MINOR;
SERPENTINITE
Location: VEINS,VUGS, Replacing: OL
Location: VESICLES
MINOR
Vesicles -
Size(mm): .07-.12
Filling: SERPENTINE
Leg : 16 Top/Bottom Interval(mm): 500/ 0 Describer: Yeats, R.S.
Hole: 163 Top of Core Depth(m) : 276.00 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 276.50 Sect/Pc #: 1/
ROCK = BASALT
SOURCE IS IR*
Groundmass - OLIVINE
Size(mm): .1-.6
COMPLETELY ALTERED BY CARBONATE AND SERPENTINE;
PYROXENE
INCIPIENT,ANGLE Z TO C = 45 DEGREES APPROX;
PLAGIOCLASE
Size(mm): .15-1.5
APPROX COMP AN63,ZONING NOT OBSERVED;
Alteration - CALCITE
Location: VEINS,VUGS, Replacing: OL
Location: VESICLES
SERPENTINITE
Location: VEINS,VUGS Replacing: OL
Vesicles -
Size(mm): .1
Filling: CALCITE
Leg : 16 Top/Bottom Interval(mm): 1220/ 0 Describer: Yeats, R.S.
Hole: 163 Top of Core Depth(m) : 276.00 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 277.22 Sect/Pc #: 1/
ROCK = BASALT
SOURCE IS IR*
Groundmass - OLIVINE
Size(mm): .1-.7
INCOMPLETE ALTERATION BY SERPENTINE,IRON OXIDE AND
CARBONATE;
PYROXENE
INCIPIENT;
PLAGIOCLASE
Size(mm): .1-1.2
APPROX COMP AN71,NORMAL NA-LABRADORITE RIM,RARE
EUHEDRAL OSCILLATORY*
Alteration - CALCITE
Location: VEINS,VUGS Replacing: OL
SERPENTINITE
Location: VEINS,VUGS, Replacing: OL
Location: VESICLES
FERROUS OXIDE
Replacing: OL
Vesicles -
Size(mm): .05-.12
Filling: SERP
Leg : 16 Top/Bottom Interval(mm): 100/ 0 Describer: Yeats, R.S.
Hole: 163 Top of Core Depth(m) : 285.00 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 286.60 Sect/Pc #: 2/
ROCK = BASALT
SOURCE IS IR*
Groundmass - OLIVINE
Size(mm): .07-.2
APPROX COMP FO90,INCOMPLETE ALTERATION TO TALC+
SERPENTINE,APPROX COMP BY 2V;
PYROXENE
Size(mm): .1-.3
Z TO C ANGLE INCLINED;
PLAGIOCLASE
Size(mm): .2-1.2
APPROX COMP AN67,RARE EUHEDRAL OSCILLATORY ZONING*
Alteration - SERPENTINITE
Replacing: OL
CONSIDERABLE ALTERATION TO SERPENTINE;
CALCITE
Location: IRREGULAR
Location: PATCHES,VEINS
TALC
Replacing: OL
Vesicles -
Size(mm): .12
Filling: SERPENTINE
POSSIBLE VESICLE*
Leg : 16 Top/Bottom Interval(mm): 650/ 0 Describer: Yeats, R.S.
Hole: 163 Top of Core Depth(m) : 285.00 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 287.15 Sect/Pc #: 2/
ROCK = BASALT
SOURCE IS IR*
Groundmass - OLIVINE
Size(mm): .1-.15
COMPLETELY ALTERED TO SERPENTINE;
PYROXENE
Size(mm): .005-.3
Z TO C ANGLE INCLINED;
PLAGIOCLASE
Size(mm): .2-1.5
APPROX COMP AN66,LOCAL WEAK NORMAL ZONES*
Alteration - SERPENTINITE
Replacing: OL
CARBONATE
RELATIVELY MINOR SERPENTINE+CARBONATE*
Vesicles -
Percent: 0
Leg : 16 Top/Bottom Interval(mm): 540/ 0 Describer: Yeats, R.S.
Hole: 163 Top of Core Depth(m) : 285.00 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 288.54 Sect/Pc #: 3/
ROCK = BASALT
SOURCE IS IR*
Groundmass - OLIVINE ( 1.2%)
Size(mm): .1-.4
APPROX COMP FO95 BY 2V,MODERATE ALTERATION BY
SERPENTINE;
PYROXENE ( 49.2%)
Size(mm): .05-.5
2VZ=50+OR-5 DEGREES,Z TO C ANGLE=50 DEGREES,
BIREFRINGENCE(Z/X)=.026;
PLAGIOCLASE ( 45.2%)
Size(mm): .1-3
APPROX COMP AN68,LOCAL APPROX COMP AN72,LOCAL
NORMAL ZONES TO NA-LABRADORITE*
OPAQUE MINERAL ( 4.4%)
ANALYSIS BY MODAL ANALYSIS*
Alteration - SERPENTINITE
Replacing: OL
MINOR;
CALCITE
MINOR*
Vesicles -
Percent: 0
Leg : 16 Top/Bottom Interval(mm): 670/ 0 Describer: Yeats, R.S.
Hole: 163 Top of Core Depth(m) : 285.00 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 290.17 Sect/Pc #: 4/
ROCK = BASALT
RELATIVELY FRESH,SOURCE IS IR*
Groundmass - OLIVINE ( 15.6%)
Size(mm): .2-.3
APPROX COMP FO85,MODERATE ALTERATION TO
BOWLINGITE,APPROX COMP BY 2C;
PYROXENE ( 31.2%)
Size(mm): .2-1.2
2VZ=40-45 DEGREES,Z TO C ANGLE=40 DEGREES,
BIREFRINGENCE(Z-X)=.030;
PLAGIOCLASE ( 49.6%)
Size(mm): .3-1.5
APPROX COMP AN70,NORMAL RIMS ZONING OF NA-
LABRADORITE;
OPAQUE MINERAL ( 2.0%)
MATRIX ( 1.8%)
ANALYSIS BY MODAL ANALYSIS*
Alteration - BOWLINGITE
Replacing: OL
Vesicles -
Percent: 0
Leg : 16 Top/Bottom Interval(mm): 1160/ 0 Describer: Yeats, R.S.
Hole: 163 Top of Core Depth(m) : 285.00 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 290.66 Sect/Pc #: 4/
ROCK = BASALT
RELATIVELY FRESH,SOURCE IS IR*
Groundmass - OLIVINE
Size(mm): .1-.2
INCOMPLETE ALTERATION TO SERPENTINE+TALC;
PYROXENE
Size(mm): .2-.8
2VZ=15+OR-15 DEGREES,Z TO C ANGLE INCLINED,
BIREFRINGENCE(Z-X)=.026;
PLAGIOCLASE
Size(mm): .05-1
APPROX COMP AN65,WEAK NORMAL RIMS ZONING*
Alteration - SERPENTINITE
Replacing: OL
TALC
Replacing: OL
Vesicles -
Percent: 0
Leg : 16 Top/Bottom Interval(mm): 1420/ 0 Describer: Yeats, R.S.
Hole: 163 Top of Core Depth(m) : 285.00 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 290.92 Sect/Pc #: 4/
ROCK = BASALT
SOURCE IS IR*
Groundmass - OLIVINE
Size(mm): .1-.3
INCOMPLETELY ALTERED TO SERPENTINE AND TALC;
PYROXENE
INCIPIENT;
PLAGIOCLASE
Size(mm): .1-1
APPROX COMP AN64,NORMAL RIMS ZONING*
Alteration - SERPENTINITE
Replacing: OL
MODERATE SERPENTIZATION;
TALC
Replacing: OL
Vesicles -
Percent: 0
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