Leg : 59 Top/Bottom Interval(mm): 00/ 20 Describer: Scott, R. Hole: 450 Top of Core Depth(m) : 311.50 Rock Type: IGNEOUS Core: 34 Sample Midpoint(m) : 311.51 Sect/Pc #: 1/ ROCK = PLAG-CPX-OL PHYRIC BASALT CLAST IN SEDIMENT (TUFFACEOUS VOLCANICLASTIC NANNOFOSSIL CHALK BRECCIA); Texture: PORPHYRITIC,HYALOPILITIC; Where sampled: FLOW INTERIOR* Phenocrysts- OLIVINE ( 2%) Size(mm): 0.5 PLAGIOCLASE ( 15%) Size(mm): 2 APPROX COMP AN66; CLINOPYROXENE ( 8%) Size(mm): 0.4 Groundmass - PLAGIOCLASE ( 35%) Size(mm): 0.05 CLINOPYROXENE ( 20%) OPAQUE MINERALS ( 5%) INCLUDES MAGN + ILMENITE; GLASS ( 10%) ALTERED TO CLAYS + ZEOLITES* Alteration - CLAY MINERALS Location: VESICLES, Replacing: GLASS Location: GROUNDMASS FAIRLY EXTENSIVE; ZEOLITE Location: VESICLES, Replacing: GLASS Location: GROUNDMASS FAIRLY EXTENSIVE; OTHER OXIDIZED REGIONS* Vesicles - Size(mm): 0.3 Percent: 5 Filling: CLAY.MIN, Shape: NEARLY Filling: ZEOLITES Shape: SPHERICAL BROWN CLAY EDGES WITH ZEOLITE CENTERS* Leg : 59 Top/Bottom Interval(mm): 100/ 130 Describer: Mattey, D. Hole: 450 Top of Core Depth(m) : 330.50 Rock Type: IGNEOUS Core: 36 Sample Midpoint(m) : 333.62 Sect/Pc #: 3/PCE 1A ROCK = PLAG-OL PHYRIC BASALT; Texture: PORPHYRITIC,HYALOPILITIC; Where sampled: PILLOW INTERIOR* Phenocrysts- OLIVINE ( <1%) Size(mm): 0.2-0.5 Morphology: EUHEDRAL PSEUDOMORPHS (IDDINGSITE + SMEC); PLAGIOCLASE ( 10%) Size(mm): 0.5-4 Morphology: EUHEDRAL,EQUANT,LATHS GLOMEROPHYRIC (LARGER XTLS),UNZONED,GLASS INCLUSIONS,TWO GENERATIONS: 2-4 MM WITH APPROX COMP AN60-80 (EQUANT) AND 0.5-1.5 MM WITH APPROX COMP AN40-60 (LATHS)* Groundmass - PLAGIOCLASE ( 30%) Size(mm): 0.2-0.4 Morphology: QUENCH,SKELETAL APPROX COMP AN50; CLINOPYROXENE ( 5%) Size(mm): 0.2 RARE SUBOPHITIC CLOTS; OPAQUE MINERALS ( TR%) INCLUDES MAGN + ILMENITE,SCATTERED GRANULES; GLASS ( 55%) DEVITRIFIED,<2% ALTERED* Alteration - CHLOROPHAEITE Location: VESICLES CLAY MINERALS ( 5%) Location: VESICLES Replacing: OL PHENOS,GLASS SMEC REPLACES OL PHENOS; IDDINGSITE Replacing: OL PHENOS Vesicles - Size(mm): 0.1-0.5 Percent: 2 Filling: CHLOROPHAEITE, Shape: SPHERICAL Filling: CLAY.MIN Leg : 59 Top/Bottom Interval(mm): 310/ 350 Describer: Mattey, D. Hole: 450 Top of Core Depth(m) : 330.50 Rock Type: IGNEOUS Core: 36 Sample Midpoint(m) : 333.83 Sect/Pc #: 3/PCE 1D ROCK = PLAG-OL MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,SPHERULITIC-HYALOPILITIC; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- OLIVINE ( 2%) Size(mm): 0.2-0.5 Morphology: SKELETAL,EUHEDRAL PSEUDOMORPHED BY IDDINGSITE + SMEC PLAGIOCLASE ( 7%) Size(mm): 0.5-2 APPROX COMP AN70,ZONED,PARTLY REPLACED BY CALCITE + SMEC* Groundmass - PLAGIOCLASE ( 20%) Size(mm): 0.1-0.3 Morphology: SKELETAL MICROLITES CLINOPYROXENE ( TR%) Morphology: GRANULAR-SUBPOIKILITIC GLASS ( 70%) CONTAINS FRAGMENT OF VITRIC TUFF ZENOLITH (5-8 MM X 2 MM)* Alteration - CLAY MINERALS Replacing: OL PHENOS,PLAG PHENOS, Replacing: GLASS REPLACES MAFICS,OL PHENOS + PLAG PHENOS REPLACED PARTLY BY SMEC; IDDINGSITE Replacing: OL PHENOS CALCITE Replacing: PLAG PHENOS Vesicles - Percent: TR VERY RARE* Leg : 59 Top/Bottom Interval(mm): 1390/1450 Describer: Mattey, D. Hole: 450 Top of Core Depth(m) : 330.50 Rock Type: IGNEOUS Core: 36 Sample Midpoint(m) : 334.92 Sect/Pc #: 3/PCE 14B ROCK = PLAG-OL PHYRIC BASALT; Texture: PORPYRITIC,HYALOPILITIC; Where sampled: PILLOW INTERIOR* Phenocrysts- OLIVINE ( TR%) Size(mm): 0.2 Morphology: SUBHEDRAL REPLACED BY CLAY MINS; PLAGIOCLASE ( 15%) Size(mm): 2-6 Morphology: EUHEDRAL APPROX COMP AN60-70,LARGE EUHEDRAL ZONED XTLS* Groundmass - PLAGIOCLASE ( 40%) Size(mm): 0.1-0.3 Morphology: SKELETAL MICROLITES FLOW ALIGNED; CLINOPYROXENE ( TR%) OPAQUE MINERALS ( TR%) INCLUDES MAGN + ILMENITE; GLASS ( 45%) DEVITRIFIED,PARTLY ALTERED* Alteration - CLAY MINERALS ( <10%) Replacing: GLASS,OL PHENOS Vesicles - Size(mm): 0.2-0.5 Percent: 2 Filling: SMEC,CALCITE,ZE Shape: OLITE SMEC IS GREEN* |
Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]
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