Leg : 55 Top/Bottom Interval(mm): 300/ 400 Describer: Dalrymple, G.
Hole: 432A Top of Core Depth(m) : 36.00 Rock Type: IGNEOUS
Core: 1 Sample Midpoint(m) : 36.35 Sect/Pc #: 1/PCE 3
ROCK = APHYRIC BASALT
NO PHENOCRYSTS WERE OBSERVED IN THIN SECTION;
Texture: SUBTRACHYTIC,APHYRIC;
Where sampled: POSSIBLY A PEBBLE IN THE SEDIMENT*
Groundmass - OLIVINE ( 0%)
UNCERTAIN ABOUT OL ABUNDANCE;
PLAGIOCLASE ( 60%)
Size(mm): 0.4-0.04 Morphology: LATHS
CLINOPYROXENE ( 0%)
UNCERTAIN ABOUT CPX ABUNDANCE;
OPAQUE MINERALS ( 5%)
INCLUDES MAGN+ILMENITE;
GLASS (25-35%)
Morphology: INTERSTITIAL
APPROX HALF IS DEVITRIFIED AND ALTERED, OTHER HALF
IS BROWN AND FRESH*
Alteration - CARBONATE ( 2%)
Location: INTERSTITIAL, Replacing: GLASS,OL
Location: FRACTURES
ID FOR REPLACED OL IS UNCERTAIN;
CLAY MINERALS ( 15%)
Location: INTERSTITIAL, Replacing: GLASS,OL
Location: FRACTURES
ID FOR REPLACED OL IS UNCERTAIN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 40/ 70 Describer: Clague, D.
Hole: 432A Top of Core Depth(m) : 41.50 Rock Type: SEDIMENTARY
Core: 2 Sample Midpoint(m) : 41.56 Sect/Pc #: 1/PCE 1
ROCK = OL SPARSELY PHYRIC BASALT
ALKALI BASALT;
Texture: INTERSERTAL-HYALOPILITIC,SPARSELY PHYRIC;
Where sampled: UNKNOWN,PEBBLE IN CONGLOMERATE*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 1.5
COMPLETELY ALTERED TO CLAY.MINS*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 65%)
CLINOPYROXENE ( 1%)
Morphology: ELONGATE
VERY TI-RICH;
TITANOMAGNETITE ( 10%)
Morphology: EQUANT
APATITE
Morphology: ACICULAR
LONG NEEDLES;
RUTILE
Morphology: EUHEDRAL FLAKES
ID UNCERTAIN FOR RUTILE,DK PURPLE-BROWN*
Alteration - CARBONATE ( <1%)
Location: INTERSTITIAL
CLAY MINERALS ( 24%)
Location: INTERSTITIAL Replacing: GLASS
ID FOR REPLACED GLASS IS UNCERTAIN*
Leg : 55 Top/Bottom Interval(mm): 110/ 120 Describer: Clague, D.
Hole: 432A Top of Core Depth(m) : 41.50 Rock Type: SEDIMENTARY
Core: 2 Sample Midpoint(m) : 41.62 Sect/Pc #: 1/PCE 1
ROCK = APHYRIC BASALT
NO PHENOCRYSTS WERE OBSERVED IN THIN SECTION;
Texture: SUBTRACHYTIC,APHYRIC;
Where sampled: PEBBLE IN CONGLOMERATE*
Groundmass - OLIVINE ( 5%)
Size(mm): <0.05
COMPLETELY IDDINGSITIZED;
PLAGIOCLASE ( 60%)
Size(mm): 0.1-0.4 Morphology: LATHS,IRREGULAR PATCHES
CLINOPYROXENE ( 0%)
OPAQUE MINERALS ( 15%)
INCLUDES MAGN+ILMENITE, MOSTLY MAGN WITH EXSOLVED
ILMENITE, BOTH ARE ALTERED*
Alteration - CARBONATE ( 2%)
Location: VESICLE RIMS,
Location: VEIN RIMS
ROCK IS DEFINITELY MORE ALTERED NEAR RIMS;
CLAY MINERALS ( 10%)
Location: GROUNDMASS Replacing: GLASS
ID FOR REPLACED GLASS UNCERTAIN,IN DISTINCT
PATCHES*
Vesicles -
Percent: 5
Location: NEAR MARGINS
Filling: CALCITE,EMPTY
Shape: IRREGULAR
Leg : 55 Top/Bottom Interval(mm): 830/ 850 Describer: Avdeiko, G.
Hole: 432A Top of Core Depth(m) : 41.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 42.34 Sect/Pc #: 1/PCE 8B
ROCK = PLAG MOD PHYRIC BASALT;
Texture: INTERSERTAL-DIABASIC,MODERATELY PHYRIC;
Where sampled: FLOW INTERIOR
FLOW 1*
Phenocrysts- PLAGIOCLASE ( <5%)
Size(mm): TO 2X3 Morphology: TABULAR
ZONED,SOMETIMES SLIGHTLY ALTERED IN CENTRAL PARTS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2-0.4 Morphology: ANHEDRAL
COMPLETELY ALTERED;
PLAGIOCLASE (40-50%)
Size(mm): 1-3 Morphology: LONG LATHS
1-3MM LONG,INTERSERTAL-DIABASIC CROSSING;
CLINOPYROXENE (20-25%)
Size(mm): TO 0.5 Morphology: SUBHEDRAL,PRISMATIC,
Morphology: INTERSTITIAL
TI-RICH;
OPAQUE MINERALS ( 5-7%)
Size(mm): 0.1-0.2
INCLUDES HOMOGENEOUS TITAN.MT+ILMENITE, USUALLY
0.1 MM SIZE;
GLASS (15-20%)
Morphology: INTERSTITIAL
COMPLETELY ALTERED;
APATITE ( <1%)
Morphology: ACICULAR
(CULAR%)
Size(mm): NEEDLES;
PYRITE
Alteration - CARBONATE ( 2-3%)
Location: INTERGRAINS. Replacing: GLASS,PLAG
Location: PL-PHENOCRYST
REPLACING CENTRAL PARTS OF PLAG, THE ALTERATION IS
NEAR CARBONATE VEINS;
CLAY MINERALS ( 20%)
Location: FRACTURES Replacing: GLASS,OL,PLAG,PYX
PLAG+CPX ALTERED ALONG FRACTURES*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 860/ 925 Describer: Kirkpatrick, J.
Hole: 432A Top of Core Depth(m) : 41.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 42.39 Sect/Pc #: 1/
ROCK = PLAG-OL PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 25% ALTERED;
Texture: PHYRIC,SUBOPHITIC*
Phenocrysts- PLAGIOCLASE ( 9%)
Size(mm): 2.48
OLIVINE ( 2%)
Size(mm): 0.54
Groundmass - PLAGIOCLASE ( 52%)
Size(mm): .10-2.30
CLINOPYROXENE ( 25%)
Size(mm): .02-.50
TITANOMAGNETITE ( 6%)
Size(mm): .005-.10 Morphology: EQUANT
PARTLY REPLACED BY HEMATITE;
OLIVINE ( 4%)
Size(mm): .06-.42
COMPLETELY REPLACED BY IDDINGSITE AND SMECTITE;
APATITE ( 1%)
Size(mm): .05-.20
ILMENITE ( 1%)
Size(mm): .01-.19
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - HEMATITE
Replacing: TITAN.MT
IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1320/1350 Describer: Clague, D.
Hole: 432A Top of Core Depth(m) : 41.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 42.84 Sect/Pc #: 1/PCE 11
ROCK = PLAG-OL MOD PHYRIC BASALT;
Texture: DIABASIC,MODERATELY PHYRIC;
Where sampled: FLOW INTERIOR
NEAR ALTERED BASE OF FLOW 1*
Phenocrysts- OLIVINE ( 3%)
Size(mm): TO 0.5
ALTERED TO EITHER IDDINGSITE OR FIBROUW CLAYS;
PLAGIOCLASE ( 5%)
Size(mm): TO 1
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): 0.8
2/3 ALTERED TO CLAYS;
MAGNETITE ( 10%)
Size(mm): 0.05
COULD BE AFTER OL,(PERHAPS 1/2 OF GROUNDMASS
CLAYS)*
Alteration - CARBONATE ( 2%)
Location: VEIN FILLING
CLAY MINERALS ( 28%)
Location: INTERSTITIAL Replacing: GLASS,OL
ID FOR REPLACED GLASS UNCERTAIN*
Vesicles -
Size(mm): TO 2
Percent: 2
Filling: GREEN CLAY,
Shape: ROUND
Filling: HEMATITE
Leg : 55 Top/Bottom Interval(mm): 830/ 930 Describer: Kirkpatrick, J.
Hole: 432A Top of Core Depth(m) : 41.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 43.88 Sect/Pc #: 2/
ROCK = PLAG-OL PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 16% ALTERED;
Texture: PHYRIC,SUBTRACHYTIC,GLOMEROPHYRIC*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 1.37
OLIVINE ( <1%)
Size(mm): 1.00
Groundmass - PLAGIOCLASE ( 52%)
Size(mm): .05-5.00
CLINOPYROXENE ( 19%)
Size(mm): .10-.67
OLIVINE ( 8%)
Size(mm): .05-.50
COMPLETELY REPLACED BY IDDINGSITE;
MAGNETITE ( 8%)
Size(mm): .01-.10
SOME PARTLY REPLACED BY HEMATITE;
APATITE ( 1%)
Size(mm): .05-.10
ILMENITE ( 1%)
Size(mm): .02-.21
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .10-1.11
Percent: 6
Shape: IRREGULAR
ELONGATED IN DIRECTION OF FLOW,HAVE BOTRYOIDAL
CLAY LININGS*
Leg : 55 Top/Bottom Interval(mm): 1000/1020 Describer: Avdeiko, G.
Hole: 432A Top of Core Depth(m) : 41.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 44.01 Sect/Pc #: 2/PCE 11
ROCK = PLAG PHYRIC BASALT;
Texture: PORPHYRITIC,DIABASIC
DIABASIC GROUNDMASS;
Where sampled: FLOW INTERIOR
FLOW 2*
Phenocrysts- PLAGIOCLASE (10-12%)
Size(mm): 2-7 Morphology: TABULAR
PARTLY(10-15%) ALTERED TO CLAYS*
Groundmass - OLIVINE (10-12%)
Size(mm): 0.1-0.7 Morphology: SUBHEDRAL
MICROPHENOCRYSTS ALTERED TO IDDINGSITE WITH
ASSOCIATED OP.MINS(MAY BE SECONDARY);
PLAGIOCLASE (55-60%)
Size(mm): 0.5-2 Morphology: LATHS
0.5-2.0MM LONG;
CLINOPYROXENE ( 5-7%)
Size(mm): 0.05-1.0 Morphology: IRREGULAR,INTERSTITIAL
TI-RICH;
INCLUDES TITAN.MT+ILMENITE, TITAN.MT WITH
EXSOLVED ILMENITE;
OPAQUE MINERALS ( 8-10%)
Size(mm): 0.05-0.3 Morphology: ANHEDRAL-SUBHEDRAL
GLASS ( <5%)
Morphology: INTERSTITIAL
COMPLETELY ALTERED TO CLAYS+CARBONATES NEAR
FRACTURES;
APATITE ( <1%)
Morphology: NEEDLES
Alteration - CARBONATE ( 1-2%)
Location: FRACTURESS Replacing: GLASS,PLAG
CLAY MINERALS ( 3-4%)
Location: VESICLES Replacing: GLASS,PLAG
IDDINGSITE ( 10%)
Replacing: OL
Vesicles -
Size(mm): 0.5
Percent: 1
Filling: CLAY.MIN
Shape: IRREGULAR,
Shape: ROUNDED
CLAY.MINS ON WALLS ONLY*
Leg : 55 Top/Bottom Interval(mm): 310/ 330 Describer: Clague, D.
Hole: 432A Top of Core Depth(m) : 41.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 44.82 Sect/Pc #: 3/PCE 1E
ROCK = PLAG-OL MOD PHYRIC BASALT
ALKALI BASALT,FLOW 2;
Texture: INTERGRANULAR-INTERSERTAL,MODERATELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
TOTALLY IDDINGSITIZED;
PLAGIOCLASE ( 2%)
Groundmass - OLIVINE ( 2%)
Size(mm): TO 0.5 Morphology: EUHEDRAL
ALTERED TO IDDINGSITE SOME WITH CLAY RIMS,GRADES
INTO MICROPHENOS;
PLAGIOCLASE ( 50%)
Size(mm): 0.3 Morphology: LATHS
CLINOPYROXENE ( 20%)
Size(mm): 0.2 Morphology: GRANULAR
TI-AUGITE;
TITANOMAGNETITE ( 8%)
Morphology: SUBHEDRAL
EXSOLVED TO ILMENITE,ALTERED TO TITANOMAGHEMITE;
APATITE ( 1%)
Alteration - CLAY MINERALS ( 10%)
Location: GROUNDMASS,
Location: VESICLES
Vesicles -
Size(mm): 1.5
Percent: 1-2
Filling: CLAY.MINS
Shape: ROUNDED
CLAY LINES VESICLES*
Leg : 55 Top/Bottom Interval(mm): 370/ 430 Describer: Kirkpatrick, J.
Hole: 432A Top of Core Depth(m) : 41.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 44.90 Sect/Pc #: 3/
ROCK = PLAG-OL PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 12% ALTERED;
Texture: PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 16%)
Size(mm): 2.63
OLIVINE ( 3%)
Size(mm): 0.67
Groundmass - PLAGIOCLASE ( 49%)
Size(mm): .02-3.30
CLINOPYROXENE ( 21%)
Size(mm): .03-.50
OLIVINE ( 4%)
Size(mm): .05-.50
COMPLETELY REPLACED BY IDDINGSITE + SMECTITE AND
CALCITE;
TITANOMAGNETITE ( 4%)
Size(mm): .01-.10 Morphology: EQUANT
APATITE ( 2%)
Size(mm): .01-.30
ILMENITE ( 1%)
Size(mm): .03-.25
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
CALCITE
Replacing: OL
Vesicles -
Size(mm): .19-.90
Percent: 5
Filling: SMECTITE
Shape: ROUNDED
GENERALLY FILLED WITH YELLOW SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 860/ 890 Describer: Kirkpatrick, J.
Hole: 432A Top of Core Depth(m) : 55.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 57.38 Sect/Pc #: 2/
ROCK = PLAG-OL SPARSELY PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 5% ALTERED;
Texture: SPARSELY PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 1.40
OLIVINE ( <1%)
Size(mm): 0.50
Groundmass - PLAGIOCLASE ( 53%)
Size(mm): .05-.41
CLINOPYROXENE ( 29%)
Size(mm): .01-.10
MAGNETITE ( 11%)
Size(mm): .01X.01
OLIVINE ( 6%)
Size(mm): .01-.42
80-85% REPLACED BY OLIVE GREEN SMECTITE,CHLORITE
(?)PRESENT,PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
CHLORITE
Replacing: OL
ID UNCERTAIN FOR CHLORITE*
Leg : 55 Top/Bottom Interval(mm): 1060/1080 Describer: Dalrymple, G.
Hole: 432A Top of Core Depth(m) : 55.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 57.57 Sect/Pc #: 2/PCE 11
ROCK = OL-PLAG MODERATELY PHYRIC BASALT;
Texture: INTERGRANULAR,MODERATELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.2-2 Morphology: EUHEDRAL
PARTLY ALTERED ON RIMS TO GREEN CLAY;
PLAGIOCLASE ( <1%)
Size(mm): 0.5-0.2 Morphology: ANHEDRAL
FRESH,UNZONED*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.02
PLAGIOCLASE ( 60%)
Size(mm): 0.4-0.05 Morphology: LATHS
CLINOPYROXENE ( 20%)
Size(mm): 0.02
OPAQUE MINERALS ( 10%)
Size(mm): 0.04-0.005
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 1%)
Location: INTERSTITIAL
GREENISH CLAY;
ZEOLITE ( <1%)
Location: FRACTURES
ANALCIME, ALONG SMALL FRACTURES*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 1200/1260 Describer: Kirkpatrick, J.
Hole: 432A Top of Core Depth(m) : 55.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 57.73 Sect/Pc #: 2/
ROCK = OL SPARSELY PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 2% ALTERED;
Texture: SPARSELY PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 1.40
Groundmass - PLAGIOCLASE ( 58%)
Size(mm): .02-.50
CLINOPYROXENE ( 28%)
Size(mm): .008-.10
TITANOMAGNETITE ( 10%)
Size(mm): .002-.20 Morphology: EQUANT
OLIVINE ( 1%)
Size(mm): .05-.50
40% REPLACED BY OLIVE GREEN SMECTITE,CHLORITE(?)
PRESENT;
ILMENITE ( 2%)
Size(mm): .01-.10
PYRITE
BOTH PYRITE AND CHALCOPYRITE ARE PRESENT;
PHILLIPSITE
RARE IN GROUNDMASS,PERCENTAGES OBTAINED BY POINT
COUNT*
Alteration - SMECTITE
Replacing: OL
CHLORITE
Replacing: OL
ID UNCERTAIN FOR CHLORITE*
Leg : 55 Top/Bottom Interval(mm): 150/ 170 Describer: Clague, D.
Hole: 432A Top of Core Depth(m) : 64.50 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 66.16 Sect/Pc #: 2/PCE 2B
ROCK = OL-PLAG MOD PHYRIC BASALT
ALKALI BASALT;
Texture: SUBOPHITIC-INTERSERTAL,MODERATELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): TO 1.5-2 Morphology: EUHEDRAL
REPLACED BY CLAY+CALCITE;
PLAGIOCLASE ( <1%)
Size(mm): TO 1.6 Morphology: RESORBED
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.2
VERY RARE FRESH CORES;
PLAGIOCLASE (48-50%)
Size(mm): 0.3
CLINOPYROXENE ( 20%)
Size(mm): 0.6 Morphology: SUBOPHITIC
PALE BROWN,TI-RICH;
TITANOMAGNETITE ( 5%)
Size(mm): 0.05
NEARLY HOMOGENEOUS, POSSIBLY TRACE OF RUTILE;
APATITE ( <1%)
BIOTITE ( <1%)
DARK REDDISH*
Alteration - CARBONATE ( <1%)
Location: INTERSTITIAL
SUBOPHITIC XTLS;
CLAY MINERALS ( 15%)
Replacing: GLASS
ZEOLITE ( 5%)
Location: VESICLES,
Location: GROUNDMASS
REFRACTIVE INDEX OF ZEOLITES<PLAG*
Vesicles -
Percent: <1
Filling: ZEOLITES
Shape: ROUND
Leg : 55 Top/Bottom Interval(mm): 1200/1220 Describer: Clague, D.
Hole: 432A Top of Core Depth(m) : 64.50 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 71.71 Sect/Pc #: 5/PCE 7
ROCK = PLAG-OL SPARSELY PHYRIC BASALT
ALKALI BASALT;
Texture: OPHITIC-INTERSERTAL,SPARSELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 1 Morphology: EUHEDRAL
COMPLETELY REPLACED BY CLAYS;
PLAGIOCLASE ( <1%)
Size(mm): <0.7
RESORBED*
Groundmass - OLIVINE ( 5%)
Morphology: EUHEDRAL
COMPLETELY REPLACED BY CLAYS;
PLAGIOCLASE ( 50%)
Size(mm): 0.15 Morphology: LATHS
CLINOPYROXENE ( 20%)
Size(mm): 1.5 Morphology: OPHITIC
TI-RICH,OPHITIC PLATES;
TITANOMAGNETITE ( 7%)
Size(mm): 0.07
NEARLY HOMOGENEOUS;
ILMENITE ( 0%)
GLASS ( 18%)
ALTERED TO BRWON TO BRIGHT GREEN CLAYS;
APATITE ( <1%)
Morphology: ACICULAR
LONG NEEDLES*
Alteration - CLAY MINERALS ( 23%)
Location: INTERSTITIAL Replacing: GLASS,OL
Vesicles -
Size(mm): 0.5
Percent: 1
Filling: CLAY.MINS
Shape: ROUND
Leg : 55 Top/Bottom Interval(mm): 1350/1380 Describer: Kirkpatrick, J.
Hole: 432A Top of Core Depth(m) : 71.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 72.37 Sect/Pc #: 1/
ROCK = OL-PLAG SPARSELY PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 24% ALTERED;
Texture: SPARSELY PHYRIC,SUBTRACHYTIC,OPHITIC*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.84
PLAGIOCLASE ( 1%)
Size(mm): 0.73
Groundmass - PLAGIOCLASE ( 54%)
Size(mm): .02-.73
CLINOPYROXENE ( 23%)
Size(mm): .01-.10
OLIVINE ( 11%)
Size(mm): .05-.50
80-85% REPLACED BY OLIVE GREEN SMECTITE,CHLORITE
(?)PRESENT;
MAGNETITE ( 7%)
Size(mm): .005-.40
ILMENITE ( 2%)
Size(mm): .005-.40
APATITE ( 2%)
Size(mm): .01-.40
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
CHLORITE
Replacing: OL
ID UNCERTAIN FOR CHLORITE*
Leg : 55 Top/Bottom Interval(mm): 550/ 570 Describer: Avdeiko, G.
Hole: 432A Top of Core Depth(m) : 71.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 73.06 Sect/Pc #: 2/PCE 3D
ROCK = PLAG-OL MOD PHYRIC BASALT;
Texture: INTERSERTAL-OPHITIC,MODERATELY PHYRIC;
Where sampled: FLOW MARGIN*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.3-1.2 Morphology: SUBHEDRAL-EUHEDRAL
MOCROPHENOCRYSTS PARTIALLY ALTERED;
PLAGIOCLASE ( 2-3%)
Morphology: TABULAR
SLIGHTLY ZONED WITH TWO TYPES OF GROWTH*
Groundmass - OLIVINE ( 5%)
Size(mm): TO 0.2 Morphology: SUBHEDRAL-EUHEDRAL
PARTIALLY ALTERED (50-70%);
PLAGIOCLASE (45-50%)
Size(mm): 0.1-0.5 Morphology: MICROLITES,LATHS
CLINOPYROXENE ( 25%)
Size(mm): TO 2.0 Morphology: IRREGULAR-OPHITIC
TI-RICH;
TITANOMAGNETITE ( 10%)
Size(mm): 0.1-0.3
UNEXSOLVED;
GLASS
Size(mm): TO 5 Morphology: INTERSTITIAL
COMPLETELY ALTERED TO CLAYS;
BIOTITE ( <1%)
SINGLE GRAIN;
PYRITE ( <1%)
RUTILE ( 1%)
APATITE ( 1%)
Alteration - CARBONATE
Location: VESICLES
CLAY MINERALS ( 5-7%)
Location: INTERSTITIAL Replacing: OL
IDDINGSITE ( 1-2%)
Location: RIMS, Replacing: OL
Location: CLEAVAGES
Vesicles -
Size(mm): 1.0
Percent: TR
Filling: CARBS,CLAY.MINS
Shape: ROUNDED
SINGLE VESICLE,FILLING NEAR WALL*
Leg : 55 Top/Bottom Interval(mm): 570/ 660 Describer: Kirkpatrick, J.
Hole: 432A Top of Core Depth(m) : 71.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 73.12 Sect/Pc #: 2/
ROCK = OL-PLAG MOD PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 13% ALTERED;
Texture: MOD PHYRIC,SUBTRACHYTIC,OPHITIC*
Phenocrysts- PLAGIOCLASE ( <1%)
OLIVINE ( 2%)
Size(mm): .55
Groundmass - PLAGIOCLASE ( 52%)
Size(mm): .05-.71
CLINOPYROXENE ( 24%)
Size(mm): .01-.25
OLIVINE ( 13%)
Size(mm): .01-.50
90% REPLACED BY OLIVE GREEN SMECTITE,CHLORITE(?)
PRESENT;
TITANOMAGNETITE ( 4%)
Size(mm): .005-.25
ILMENITE ( 4%)
Size(mm): .01-.20
MAY BE PRESENT AS VERY TINY ELONGATE XTLS;
PYRITE
CHROMITE
OL PHENOS CONTAIN RARE CHROMITE,PERCENTAGES
OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
CHLORITE
Replacing: OL
ID UNCERTAIN FOR CHLORITE*
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