Leg : 55 Top/Bottom Interval(mm): 300/ 360 Describer: Kirkpatrick, J.
Hole: 433A Top of Core Depth(m) : 163.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 163.83 Sect/Pc #: 1/
ROCK = PLAG-OL-CPX MOD PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 10-12% ALTERED;
Texture: MOD PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 4%)
Size(mm): .62
OLIVINE ( <1%)
Size(mm): .58
CLINOPYROXENE ( <1%)
Size(mm): .51
Groundmass - PLAGIOCLASE (50-55%)
Size(mm): .02-.10
CLINOPYROXENE (20-25%)
Size(mm): .01-.05
SECTOR ZONED;
TITANOMAGNETITE (10-12%)
Size(mm): .001-.02 Morphology: EQUANT
WITH ILMENITE EXSOLUTION LAMELLAE;
OLIVINE ( 8-10%)
Size(mm): .01-.08
COMPLETELY REPLACED BY SMECTITE,TRACE OF CHLORITE
(?),PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
CHLORITE ( TR%)
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 380/ 400 Describer: Kirkpatrick, J.
Hole: 433A Top of Core Depth(m) : 163.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 163.89 Sect/Pc #: 1/PCE 1D
ROCK = OL-CPX-PLAG PHYRIC BASALT;
Texture: PORPHYRITIC,MICROLITIC GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 8-10%)
Size(mm): 0.3-1.5 Morphology: EUHEDRAL,SUBHEDRAL
PHENOCRYSTS(1-2%) AND MICROPHENOCRYSTS(7-8%)
COMPLETELY ALTERED TO CLAY.MINS+IDDINGSITE;
PLAGIOCLASE ( 5-7%)
Size(mm): 1-3 Morphology: TABULAR
CLINOPYROXENE ( 8-10%)
Size(mm): 0.3-0.7 Morphology: EUHEDRAL,SUBHEDRAL
MICROPHENOCRYSTS,FRESH SECTOR ZONED*
Groundmass - OLIVINE ( 5%)
Size(mm): TO 0.2 Morphology: SUBHEDRAL
ALTERED;
PLAGIOCLASE ( 40%)
Size(mm): TO 1 Morphology: LATHS
UP TO 1MM LONG,FRESH;
CLINOPYROXENE ( 15%)
Size(mm): TO 0.2
FRESH;
OPAQUE MINERALS ( 12%)
Morphology: ANHEDRAL
INCLUDES MAGN+ILMENITE;
GLASS ( 3%)
DEVITRIFIED AND ALTERED TO CLAYS;
APATITE ( <1%)
Morphology: NEEDLES
Alteration - CLAY MINERALS ( 15%)
Replacing: OL,GLASS,PLAG
OCCASSIONALLY REPLACING PLAG;
IDDINGSITE ( <1%)
Replacing: OL
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 70/ 100 Describer: Avdeiko, G.
Hole: 433A Top of Core Depth(m) : 163.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 165.09 Sect/Pc #: 2/PCE 1A
ROCK = CPX-PLAG-OL PHYRIC BASALT;
Texture: PORPHYRITIC,MICROLITIC GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5-7%)
Size(mm): 0.3-1.0 Morphology: EUHEDRAL,SUBHEDRAL
ALTERED TO IDDINGS+CLAY.MINS;
PLAGIOCLASE ( 7%)
Size(mm): 1-4 Morphology: TABULAR
SLIGHTLY ALTERED TO CLAYS AFTER CLEAVAGE;
CLINOPYROXENE ( 10%)
Size(mm): 0.3-0.8 Morphology: EUHEDRAL,SUBHEDRAL
FRESH,MICROPHENOCRYSTS,PARTLY SECTOR ZONED*
Groundmass - OLIVINE ( 5-7%)
Size(mm): TO 0.2 Morphology: GRANIS
ALTERED TO CLAY.MINS+IDDINGS;
PLAGIOCLASE ( 40%)
Size(mm): TO 1 Morphology: LATHS
UP TO 1MM LONG;
CLINOPYROXENE (12-15%)
Size(mm): TO 0.2 Morphology: GRAINS
FRESH;
OPAQUE MINERALS ( 12%)
INCLUDES MAGN+ILMENITE;
GLASS ( 5%)
Morphology: INTERSTITIAL
DEVITRIFIED AND ALTERED TO CLAYS;
APATITE ( 1%)
Alteration - CLAY MINERALS ( 15%)
Location: INTERSTITIAL Replacing: OL,GLASS,PLAG
SOMETIMES REPLACING PLAG;
IDDINGSITE ( 1-2%)
Replacing: OL
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 290/ 320 Describer: Kirkpatrick, J.
Hole: 433A Top of Core Depth(m) : 163.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 165.31 Sect/Pc #: 2/PCE 2B
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,SUBTRACHYTIC,INTERSTITIAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 0.2-0.4 Morphology: EUHEDRAL
MICROPHENOCRYSTS, SOME IDDINGSITIZED;
PLAGIOCLASE ( 5%)
Size(mm): 1-4 Morphology: EUHEDRAL
GLOMEROCRYSTS WITH CPX+PLAG;
CLINOPYROXENE ( 2%)
Size(mm): 0.2-0.5 Morphology: SUBHEDRAL
MICROPHENOCRYSTS*
Groundmass - OLIVINE ( 10%)
Size(mm): 0.02-0.1 Morphology: ANHEDRAL
PLAGIOCLASE ( 50%)
Size(mm): 0.1-1 Morphology: LATHS,SUBHEDRAL
CLINOPYROXENE ( 10%)
Size(mm): 0.04-0.1 Morphology: ANHEDRAL
OPAQUE MINERALS ( 10%)
Size(mm): 0.01-0.05 Morphology: EUHEDRAL-SUBHEDRAL
INCLUDES MAGN+ILMENITE;
APATITE ( TR%)
Alteration - CARBONATE
Location: VEIN Replacing: CALC,FOSSIL FRAGMENTS,
LIMESTONE FILLING VEIN,NOT INCLUDED IN ABUNDANCES;
CLAY MINERALS ( 10%)
Location: INTERSTICES Replacing: INTERSTITIAL MATERIAL,
Replacing: GLASS
Leg : 55 Top/Bottom Interval(mm): 320/ 360 Describer: Kirkpatrick, J.
Hole: 433A Top of Core Depth(m) : 163.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 165.34 Sect/Pc #: 2/PCE 2C
ROCK = CPX-PLAG-OL MOD PHYRIC BASALT;
Texture: PORPHYRITIC,SUBTRACHYTIC,INTERSTITIAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.2-0.4 Morphology: EUHEDRAL
MICROPHENOS COMPLETELY ALTERED TO IDDINGS;
PLAGIOCLASE ( 2%)
Size(mm): 1-2 Morphology: EUHEDRAL,SKELETAL
CLINOPYROXENE ( 5%)
Size(mm): 0.2-0.4 Morphology: EUHEDRAL-SUBHEDRAL
MICROPHENOCRYSTS*
Groundmass - OLIVINE ( <1%)
Size(mm): 0.05-0.1 Morphology: EUHEDRAL,EQUANT
ALTERED TO IDDINGS;
PLAGIOCLASE ( 50%)
Size(mm): 0.08-1 Morphology: LATHS,ANHEDRAL
SIZE RANGE OVERLAPS PYX+OL MICROPHENOS;
CLINOPYROXENE ( 20%)
Size(mm): 0.04-0.1 Morphology: EQUANT,ANHEDRAL
OPAQUE MINERALS ( 18%)
Size(mm): 0.05 Morphology: EQUANT,EUHEDRAL
INCLUDES MAGN+ILMENITE;
APATITE ( TR%)
Size(mm): 0.05 Morphology: NEEDLES
Alteration - CALCITE
Location: VEIN
SPARRY CALCITE AND FECAL PELLETS, NOT COUNTED IN
ABUNDANCES;
CLAY MINERALS ( 4%)
Replacing: GLASS
Leg : 55 Top/Bottom Interval(mm): 600/ 630 Describer: Avdeiko, G.
Hole: 433A Top of Core Depth(m) : 163.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 165.62 Sect/Pc #: 2/PCE 3A
ROCK = CPX-OL-PLAG PHYRIC BASALT;
Texture: PORPHYRITIC,MICROLITIC,MICRODIABASIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5-7%)
Size(mm): 0.3-0.5 Morphology: SUBHEDRAL
MOSTLY ALTERED,SOME FRESH IN CORE OF XTL;
PLAGIOCLASE ( 5%)
Size(mm): 1-4 Morphology: TABULAR
FRESH;
CLINOPYROXENE ( 7%)
Size(mm): 0.3-1.3
FRESH,SLIGHTLY ALTERED TO CLAYS*
Groundmass - OLIVINE ( 5%)
Size(mm): TO 0.2 Morphology: GRAINS
ALTERED;
PLAGIOCLASE ( 35%)
Size(mm): TO 1 Morphology: LATHS
CENTRAL PARTS SOMETIMES ALTERED,UP TO 1MM LONG;
CLINOPYROXENE ( 10%)
Size(mm): TO 0.2 Morphology: GRAINS
FRESH;
OPAQUE MINERALS ( 12%)
Size(mm): 0.1-0.2 Morphology: IRREGULAR
INCLUDES MAGN+ILMENITE;
GLASS ( 5-7%)
Morphology: INTERSTITIAL
ALTERED;
APATITE ( <1%)
Alteration - CLAY MINERALS (20-25%)
Location: INTERSTITIAL, Replacing: OL,PLAG,CPX
Location: VESICLES
PARTLY REPLACING PLAG+CPX;
IDDINGSITE ( 1-2%)
Replacing: OL
Vesicles -
Size(mm): TO 3
Percent: 7-10
Filling: CLAYS
Shape: IRREGULAR
Leg : 55 Top/Bottom Interval(mm): 840/ 860 Describer: Dalrymple, G.
Hole: 433A Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 168.85 Sect/Pc #: 2/PCE 2C
ROCK = PLAG-OL PHYRIC BASALT
ALKALI BASALT;
Texture: PORPHYRITIC,SUBTRACHYTIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3-5%)
Size(mm): 0.7-2 Morphology: ANHEDRAL
FRESH;
PLAGIOCLASE ( 10%)
Size(mm): 0.7-7 Morphology: SUBHEDRAL
ZONED,EMBAYED;
CLINOPYROXENE ( 0%)
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1-0.05 Morphology: GRANULAR
UNALTERED;
PLAGIOCLASE ( 55%)
Size(mm): <0.01-0.7 Morphology: LATHS
SOME ALTERATION,CLAY ALONG FRACTURES;
CLINOPYROXENE ( 10%)
Size(mm): <0.01-0.1 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 5%)
Size(mm): <0.01-0.2
INCLUDES MAGN+ILMENITE;
APATITE ( 2%)
Morphology: ACICULAR NEEDLES
Alteration - CLAY MINERALS ( 5-7%)
Location: INTERSTITIAL, Replacing: OL,PLAG
Location: PATCHES
CLAY IS COLORLESS TO GREENISH,FIBROUS*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 860/ 900 Describer: Kirkpatrick, J.
Hole: 433A Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 168.88 Sect/Pc #: 2/
ROCK = PLAG-CPX-OL PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 10% ALTERED;
Texture: PHYRIC,SUBTRACHYTIC*
Phenocrysts- PLAGIOCLASE ( 12%)
Size(mm): 3.13
CLINOPYROXENE ( 4%)
Size(mm): 0.97
OLIVINE ( 1%)
Size(mm): 0.55
Groundmass - PLAGIOCLASE ( 57%)
Size(mm): .02-1.20
MAGNETITE ( 4%)
Size(mm): .005-.15
CLINOPYROXENE ( 18%)
Size(mm): .006-.50
SECTOR ZONED;
OLIVINE ( 3%)
Size(mm): .01-.50
COMPLETELY REPLACED BY CALCITE AND SMECTITE;
ILMENITE ( 1%)
Size(mm): .01-.17
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CALCITE
Replacing: OL
SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1150/1230 Describer: Kirkpatrick, J.
Hole: 433A Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 170.69 Sect/Pc #: 3/
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 12% ALTERED;
Texture: MOD PHYRIC,SUBTRACHYTIC*
Phenocrysts- PLAGIOCLASE ( 6%)
Size(mm): 1.25
CLINOPYROXENE ( 1%)
Size(mm): 0.62
OLIVINE ( 1%)
Size(mm): 1.29
Groundmass - PLAGIOCLASE ( 57%)
Size(mm): .05-.90
CLINOPYROXENE ( 23%)
Size(mm): .01-.50
SECTOR ZONED;
MAGNETITE ( 6%)
Size(mm): .002-.18
OLIVINE ( 5%)
Size(mm): .02-.50
COMPLETELY REPLACED BY SMECTITE,TRACE CHLORITE(?);
ILMENITE ( 1%)
Size(mm): .01-.15
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CHLORITE ( TR%)
SMECTITE
Vesicles -
Size(mm): .70-1.70
Percent: 1
Shape: OVOID
Leg : 55 Top/Bottom Interval(mm): 1290/1380 Describer: Kirkpatrick, J.
Hole: 433A Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 172.34 Sect/Pc #: 4/
ROCK = PLAG-CPX-OL PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 14% ALTERED;
Texture: PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 12%)
Size(mm): 2.18
CLINOPYROXENE ( 4%)
Size(mm): 0.54
OLIVINE ( <1%)
Size(mm): 0.70
CONTAIN CHROMITE*
Groundmass - PLAGIOCLASE ( 38%)
Size(mm): .05-1.50
CLINOPYROXENE ( 31%)
Size(mm): .01-.50
SECTOR ZONED;
TITANOMAGNETITE ( 6%)
Size(mm): .002-.25 Morphology: EQUANT
OLIVINE ( 4%)
Size(mm): .01-.50
COMPLETELY REPLACED BY SMECTITE AND IDDINGSITE;
ILMENITE ( 2%)
Size(mm): .008-.20 Morphology: EQUANT
APATITE ( 2%)
Size(mm): .01-.15
PYRITE
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .32-1.50
Percent: 4
Filling: SMECTITE
Shape: OVOID
FILLED WITH FIBROUS OLIVE-GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 1380/1400 Describer: Dalrymple, G.
Hole: 433A Top of Core Depth(m) : 166.50 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 172.39 Sect/Pc #: 4/PCE 15
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.6-2 Morphology: EUHEDRAL
FRESH,IDDINGS ON ONLY 1 GRAIN;
PLAGIOCLASE ( 7%)
Size(mm): 0.3-4.0 Morphology: EUHEDRAL
SOME EMBAYED,FRESH;
CLINOPYROXENE ( 1%)
Size(mm): 1 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 5-7%)
Size(mm): 0.2-0.1 Morphology: EUHEDRAL,GRANULAR
FRESH;
PLAGIOCLASE ( 50%)
Size(mm): 0.03-0.3 Morphology: LATHS
FRESH;
CLINOPYROXENE ( 15%)
Size(mm): <0.01-0.1 Morphology: GRANULAR
OPAQUE MINERALS ( 10%)
Size(mm): 0.01-0.2
INCLUDES MAGN+ILMENITE;
APATITE ( 2%)
Morphology: ACICULAR NEEDLES
Alteration - CLAY MINERALS ( 3%)
Replacing: OL
GREENISH*
Vesicles -
Percent: 0
|
