Leg : 54 Top/Bottom Interval(mm): 00/ 70 Describer: Mattey, D.
Hole: 427 Top of Core Depth(m) : 146.00 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 146.04 Sect/Pc #: 1/PCE 1
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: INTERSERTAL
UNIDENTIFIED MICROPHENOCRYSTS OBSERVED;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): TO 1 Morphology: EUHEDRAL
TWINNED,SLIGHTLY ZONED,APPROX COMP AN60;
PLAGIOCLASE ( 5%)
Size(mm): <0.5 Morphology: EUHEDRAL
SUB-SKELETAL,APPROX COMP AN40;
CLINOPYROXENE ( 10%)
Size(mm): >0.3 Morphology: EUHEDRAL,SUBHEDRAL
RARE TWINS,APPROX COMP UNKNOWN*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): <0.2 Morphology: SUB-SKELETAL
GLOMEROCRYSTS WITH CPX;
CLINOPYROXENE ( 10%)
Size(mm): <0.2 Morphology: GLOMEROCRYSTS,SUBHEDRAL
GLASS ( 60%)
MICROCRYSTALLINE(?),STRONGLY DEVITRIFIED*
Vesicles -
Size(mm): 0.1
Percent: 1-2
Filling: SMECTITE
Shape: ROUND,OVAL
Leg : 54 Top/Bottom Interval(mm): 220/ 250 Describer: Mattey, D.
Hole: 427 Top of Core Depth(m) : 146.00 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 147.74 Sect/Pc #: 2/PCE 4
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 1 Morphology: SUBHEDRAL
APPROX COMP AN60,ZONED*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): <0.8 Morphology: SUBHEDRAL
ZONED;
CLINOPYROXENE ( 35%)
Size(mm): <0.4 Morphology: ANHEDRAL
RARELY TWINNED;
TITANOMAGNETITE ( 8%)
Size(mm): <0.2 Morphology: SKELETAL,SUBHEDRAL
Vesicles -
Size(mm): 5-10
Percent: 5
Filling: ZEOLITE,
Shape: OVAL,
Filling: CALCITE
Shape: ELONGATED
UNSURE ABOUT ABUNDANCE OF VESICLES, HUGE VESICLES*
Leg : 54 Top/Bottom Interval(mm): 290/ 310 Describer: Mattey, D.
Hole: 427 Top of Core Depth(m) : 146.00 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 150.80 Sect/Pc #: 4/PCE 3
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): 1-10 Morphology: EUHEDRAL
APPROX COMP OF CORE AN80-AN65,RIM AN30,
ZONED,LARGE EUHEDRAL MEGACRYSTS AND SMALLER
PHENOCRYSTS;
CLINOPYROXENE ( 1%)
Size(mm): 1 Morphology: ANHEDRAL,GLOMEROCRYSTS
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): <0.8 Morphology: SUBHEDRAL
ZONED;
CLINOPYROXENE ( 40%)
Size(mm): <0.5 Morphology: ANHEDRAL,SUBOPHITIC
TITANOMAGNETITE ( 5%)
Size(mm): <0.5 Morphology: SKELETAL,EUHEDRAL
Leg : 54 Top/Bottom Interval(mm): 1370/1390 Describer: Mattey, D.
Hole: 427 Top of Core Depth(m) : 146.00 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 151.88 Sect/Pc #: 4/PCE 6
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): <1 Morphology: SUBHEDRAL
OSCILLATORY ZONING,SOME STRAINED(?),
APPROX COMP AN55-60*
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): <1 Morphology: SUBHEDRAL
ZONED,STRAINED(RARE);
CLINOPYROXENE ( 45%)
Size(mm): <0.5 Morphology: GRANULAR,RARE SUBOPHITIC;
TITANOMAGNETITE ( 8%)
Size(mm): <0.5 Morphology: SKELETAL,EUHEDRAL
Leg : 54 Top/Bottom Interval(mm): 780/ 800 Describer: Mattey, D.
Hole: 427 Top of Core Depth(m) : 146.00 Rock Type: IGNEOUS
Core: 9 Sample Midpoint(m) : 152.79 Sect/Pc #: 5/PCE 6B
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: INTERGRANULAR,SUB-INTERSERTAL;
APPROX 90% CRYSTALLINE;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 1 Morphology: SUBHEDRAL
STRONGLY ZONED;
CLINOPYROXENE ( 2%)
Size(mm): 1 Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): <1.5 Morphology: SUBHEDRAL
ZONED,SOME STRAINED(?);
CLINOPYROXENE ( 35%)
Size(mm): <0.8 Morphology: SUBOPHITIC,GRANULAR
TITANOMAGNETITE ( 6%)
Size(mm): <1 Morphology: LARGE EUHEDRAL,SUB-SKELETAL
GLASS ( 10%)
ALTERED TO SMECTITE(?)*
Alteration - CLAY MINERALS ( 5%)
Location: GLASSY
Location: INTERSTICES
Vesicles -
Percent: 0
Leg : 54 Top/Bottom Interval(mm): 640/ 670 Describer: Mattey, D.
Hole: 427 Top of Core Depth(m) : 155.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 156.16 Sect/Pc #: 1/PCE 4A
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1-1.5 Morphology: EUHEDRAL EQUANTS,
Morphology: SUBHEDRAL LATHS
APPROX COMP AN60-65;
CLINOPYROXENE ( 1%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL,GLOMEROPHYRIC
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): TO 1.5 Morphology: SUBHEDRAL
STRONGLY ZONED;
CLINOPYROXENE ( 40%)
Size(mm): TO 0.8 Morphology: SUBHEDRAL
MAGNETITE ( 8%)
Size(mm): TO 0.8 Morphology: EUHEDRAL,SUB-SKELETAL
LARGE;
GLASS ( 5%)
Morphology: SUBSPHERULITIC
ALTERED TO FE.OX+CLAY.MIN*
Alteration - COMBINATION ( 5%)
Location: INTERSTITIAL Replacing: GLASS
INCLUDES FE.OX+CLAY.MINS*
Leg : 54 Top/Bottom Interval(mm): 120/ 140 Describer: Humphris, S.
Hole: 427 Top of Core Depth(m) : 155.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 157.13 Sect/Pc #: 2/PCE 1A
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( <2%)
Size(mm): 1-1.5 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( <1%)
Morphology: SUBHEDRAL,GLOMEROPHYRIC
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): 1.0 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 35%)
Size(mm): TO 1.0 Morphology: SUBHEDRAL
SOME ALTERED TO BROWN MINERAL;
MAGNETITE ( 6%)
GLASS ( 5%)
SOME ALTERED TO BROWN CLAY MINERAL*
Alteration - CALCITE ( <1%)
Location: VUG FILLING
CLAY MINERALS ( 1%)
Location: VESICLES,
Location: GROUNDMASS
BROWN MINERAL*
Leg : 54 Top/Bottom Interval(mm): 1020/1060 Describer: Mattey, D.
Hole: 427 Top of Core Depth(m) : 155.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 159.54 Sect/Pc #: 3/PCE 8
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): TO 1 Morphology: EUHEDRAL,EQUANT
APPROX COMP AN60;
CLINOPYROXENE ( TR%)
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): >1 Morphology: SUBHEDRAL
ZONED,SOME STRAINED;
CLINOPYROXENE ( 40%)
Size(mm): >0.5 Morphology: ANHEDRAL,SUBOPHITIC
TITANOMAGNETITE ( 8%)
Size(mm): >0.5 Morphology: SKELETAL
GLASS ( TR%)
ALTERED TO CLAY.MIN+FE.OX*
Alteration - CLAY MINERALS ( TR%)
Location: INTERSTITIAL Replacing: GLASS
Leg : 54 Top/Bottom Interval(mm): 530/ 550 Describer: Humphris, S.
Hole: 427 Top of Core Depth(m) : 155.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 160.54 Sect/Pc #: 4/PCE 1E
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: INTERGRANULAR,INTERSERTAL
INTERSERTAL IN PARTS;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): TO 1.5 Morphology: EQUANT,SUBHEDRAL,
Morphology: EUHEDRAL LATHS
CLINOPYROXENE ( <1%)
Size(mm): 1.0 Morphology: SUBHEDRAL,GLOMEROPHYRIC
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): TO 0.5 Morphology: SUBHEDRAL,SUBEQUANT,LATHS
CLINOPYROXENE ( 40%)
MAGNETITE ( 8%)
Size(mm): <0.5
SMALLER THAN PREVIOUS SECTIONS FROM THIS HOLE;
GLASS ( 8%)
SOME ALTERATION TO BROWN MINERAL*
Leg : 54 Top/Bottom Interval(mm): 270/ 300 Describer: Mattey, D.
Hole: 427 Top of Core Depth(m) : 165.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 165.29 Sect/Pc #: 1/PCE 1
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 0.5%)
Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): <1 Morphology: SUBHEDRAL LATHS
ZONED;
CLINOPYROXENE ( 30%)
Size(mm): <0.5 Morphology: ANHEDRAL,SUBOPHITIC
TITANOMAGNETITE ( 3%)
Size(mm): 0.2 Morphology: BLADED SKELETAL XTLS
GLASS ( 30%)
CONTAINS BLADED TITAN.MT AND VARIOLITES*
Alteration - CHLORITE ( 1%)
Replacing: CPX,OLIVINE
UNCERTAIN IF OL OR CPX IS BEING REPLACED,
CHLORITE IS BRIGHT GREEN,ANOMALOUS INTERFERENCE*
Leg : 54 Top/Bottom Interval(mm): 470/ 490 Describer: Humphris, S.
Hole: 427 Top of Core Depth(m) : 165.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 165.48 Sect/Pc #: 1/PCE 4
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: INTERSERTAL,GLOMEROPHYRIC
GLASSY WITH SPHERULITIC AREAS*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): TO 1 Morphology: EUHEDRAL
SOME ZONING;
CLINOPYROXENE ( 5%)
Size(mm): >0.5 Morphology: EUHEDRAL-SUBHEDRAL
OCCASIONALLY TWINNED*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): <0.3 Morphology: LATHS,SUBSKELETAL
GLOMEROCRYSTS WITH CPX;
CLINOPYROXENE ( 10%)
Size(mm): <0.3 Morphology: SUBHEDRAL,GLOMEROCRYSTS
GLASS ( 70%)
DEVITRIFIED, IN PARTS MICROCRYSTALLINE*
Alteration - CLAY MINERALS
Location: GROUNDMASS
FERROUS OXIDE
Location: GROUNDMASS
CLAY.MINS+FE.OX MAY BE REPLACING OLIVINE;
ZEOLITE
Location: VUGS
HEMATITE
Location: VUGS
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