Leg : 55 Top/Bottom Interval(mm): 1240/1280 Describer: Dalrymple, G.
Hole: 433B Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 167.76 Sect/Pc #: 1/PCE 10A
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PORPHYRITIC*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-4 Morphology: SUBHEDRAL-ANHEDRAL
ALTERED TO IDDINGS+CLAY.MIN;
PLAGIOCLASE ( 5%)
Size(mm): 0.3-4 Morphology: ANHEDRAL
COMPLEX TWINS,ZONED;
CLINOPYROXENE ( 3%)
Size(mm): 0.2-0.5
MICROPHENOS,RAGGED,COLORLESS*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.01-0.03 Morphology: GRANULAR
ALTERED TO IDDINGSITE;
PLAGIOCLASE ( 55%)
Size(mm): 0.05-0.3 Morphology: LATHS
FRESH;
CLINOPYROXENE ( 15%)
Size(mm): 0.01-0.2 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 5-7%)
Size(mm): 0.01-0.1 Morphology: EQUANT GRAINS
INCLUDES MAGN+ILMENITE;
APATITE ( 1%)
Size(mm): 0.01
Alteration - CLAY MINERALS ( 10%)
Location: INTERSTITIAL Replacing: OL,GLASS
UNSURE ABOUT GLASS, CLAY IS GREENISH*
Leg : 55 Top/Bottom Interval(mm): 610/ 680 Describer: Kirkpatrick, J.
Hole: 433B Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 168.64 Sect/Pc #: 2/
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 6% ALTERED;
Texture: MOD PHYRIC,SUBTRACHYTIC*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 1.35
CLINOPYROXENE ( 2%)
Size(mm): 0.56
OLIVINE ( <1%)
Size(mm): 0.70
Groundmass - PLAGIOCLASE ( 60%)
Size(mm): .05-.90
CLINOPYROXENE ( 5%)
Size(mm): .006-.50
SECTOR ZONED;
TITANOMAGNETITE ( 8%)
Size(mm): .001-.10 Morphology: EQUANT
SOME HAVE ILMENITE EXSOLUTION;
OLIVINE ( 2%)
Size(mm): .01-.50
COMPLETELY REPLACED BY OLIVE GREEN SMECTITE;
ILMENITE
Morphology: EQUANT
PYRITE
CHALCOPYRITE
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
Vesicles -
Size(mm): .15-.41
Percent: 1
Shape: OVOID
Leg : 55 Top/Bottom Interval(mm): 830/ 850 Describer: Dalrymple, G.
Hole: 433B Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 168.84 Sect/Pc #: 2/PCE 3C
ROCK = OL-PLAG-CPX PHYRIC BASALT;
Texture: PORPHYRITIC;
Where sampled: FLOW MARGIN*
Phenocrysts- OLIVINE ( 7%)
Size(mm): 0.05-0.5 Morphology: SUBHEDRAL
FRESH;
PLAGIOCLASE ( 5%)
Size(mm): 2-0.2 Morphology: SUBHEDRAL
TWINNED,SOME ZONED;
CLINOPYROXENE ( 5%)
Size(mm): 0.5-0.1 Morphology: SUBHEDRAL
MICROPHENOS,FRESH*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): 0.5-0.3 Morphology: LATHS
FRESH;
CLINOPYROXENE ( 15%)
Size(mm): <0.01-0.1 Morphology: GRANULAR
FRESH;
OPAQUE MINERALS ( 7%)
Size(mm): <0.01-0.1 Morphology: EQUANT XTLS
INCLUDES MAGN+ILMENITE;
APATITE ( 1%)
Morphology: ACICULAR NEEDLES
Alteration - CLAY MINERALS
Replacing: OL
GREEN-BROWN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 850/ 900 Describer: Kirkpatrick, J.
Hole: 433B Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 170.38 Sect/Pc #: 3/
ROCK = PLAG-OL-CPX PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 6% ALTERED;
Texture: PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 9%)
Size(mm): 1.00
OLIVINE ( 7%)
Size(mm): 1.51
RARE LARGE OL HAVE KINK-BANDS,OL PHENOS CONTAIN
CHROMITE;
CLINOPYROXENE ( 2%)
Size(mm): 0.73
SECTOR ZONED*
Groundmass - PLAGIOCLASE ( 46%)
Size(mm): .05-.96
CLINOPYROXENE ( 16%)
Size(mm): .002-.20
TITANOMAGNETITE ( 12%)
Size(mm): .001-.05
OLIVINE ( 7%)
Size(mm): .01-.20
ALMOST COMPLETELY REPLACED BY GREEN SMECTITE WITH
IDDINGSITE RIMS,PERCENTAGES OBTAINED BY POINT
COUNT*
Alteration - SMECTITE
Replacing: OL
GREEN;
IDDINGSITE
Location: RIMS Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 860/ 880 Describer: Avdeiko, G.
Hole: 433B Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 170.37 Sect/Pc #: 3/PCE 9
ROCK = OL-PLAG-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,MICROLITIC GROUNDMASS;
Where sampled: FLOW INTERIOR
UNSURE ABOUT WS, POSSIBLY A BIT SAMPLE*
Phenocrysts- OLIVINE (10-12%)
Size(mm): 0.5-4 Morphology: SUBHEDRAL-EUHEDRAL
FRESH WITH IDDINGS RIMS;
PLAGIOCLASE ( 5-7%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL-TABULAR
ZONED,FRESH;
CLINOPYROXENE ( 5-7%)
Size(mm): 0.4-1.5 Morphology: SUBHEDRAL,EUHEDRAL
FRESH,SECTOR ZONED,THERE ARE CPX+PLAG KNOTS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL
ALTERATION TO IDDINGS+CLAY(50%);
PLAGIOCLASE (35-40%)
Size(mm): 0.3-1.0 Morphology: LATHS,MICROLITES
UP TO 1MM LONG;
CLINOPYROXENE ( 15%)
Size(mm): 0.1-0.2 Morphology: SUBHEDRAL,ANHEDRAL
USUALLY <0.1MM,BUT SOME ARE 0.2MM;
OPAQUE MINERALS (10-12%)
Size(mm): 0.05-0.3 Morphology: ANHEDRAL,SUBHEDRAL
INCLUDES MAGN+ILMENITE, USUALLY 0.05MM,SOME 0.3MM;
GLASS ( 5%)
Morphology: INTERSTITIAL
ALTERED TO GREEN CLAYS;
APATITE ( <1%)
Morphology: NEEDLES
Alteration - CLAY MINERALS ( 5-7%)
Location: INTERSTITIAL Replacing: GLASS,OL
PARTLY OL;
IDDINGSITE ( <1%)
Location: OL RIMS Replacing: OL
Vesicles -
Percent: 0
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