Leg : 29 Top/Bottom Interval(mm): 350/ 430 Describer: Ridley, W. Hole: 282 Top of Core Depth(m) : 294.00 Rock Type: IGNEOUS Core: 18 Sample Midpoint(m) : 297.39 Sect/Pc #: 3/ ROCK = BASALT HIGHLY ALTERED; Texture: FINE-GRAINED,RADIATE GROUNDMASS HIGHLY ALTERED BUT ORIGINAL RADIATE TEXTURE HAS BEEN PRESERVED* Groundmass - FELDSPAR Morphology: LATHS SMALL,HAVE GREENISH CORES OF SERICITE AND INTERSTITIAL PATCHES OF EPIDOTE AND CHLORITE; OPAQUE MINERALS ( 3-4%) Size(mm): .1-.5 OXIDIZED,ID UNCERTAIN,WITH CRENULATE MARGINS; OLIVINE REPLACED BY SERPENTINE* Alteration - SERPENTINITE ( 2%) Replacing: OL UP TO 1MM IN SIZE-AVERAGE .3MM,FREQUENTLY CONTAINS REDDISH-BROWN GRAINS OF CHROME SPINEL; CLAY MINERALS Replacing: FELDSPAR INCLUDES SERICITE,EPIDOTE AND CHLORITE* Leg : 29 Top/Bottom Interval(mm): 1260/1340 Describer: Ridley, W. Hole: 282 Top of Core Depth(m) : 298.00 Rock Type: IGNEOUS Core: 19 Sample Midpoint(m) : 299.30 Sect/Pc #: 1/ ROCK = BASALT; Texture: FINE-GRAINED,INTERSERTAL* Groundmass - PLAGIOCLASE Size(mm): .2-.3 Morphology: LATHS PYROXENE VERY FINE GRAINED,SUBRADIATE; TITANOMAGNETITE INTERGROWN WITH PYX* Alteration - IDDINGSITE Replacing: OL RARE PSEUDOMORPHS OF ANTIGORITE-IDDINGSITE INTERGROWTHS AFTER MICROPHENO OL; SERPENTINITE Replacing: GLASS IRREGULAR AREAS,PROBABLY ORIGINALLY GLASS,ARE NOW ALTERED TO SPHERULITE-LIKE,LAYERED INTERGROWTHS OF IDDINGSITE AND SERPENTINE?* Leg : 29 Top/Bottom Interval(mm): 450/ 530 Describer: Ridley, W. Hole: 282 Top of Core Depth(m) : 307.00 Rock Type: IGNEOUS Core: 20 Sample Midpoint(m) : 310.49 Sect/Pc #: 3/ ROCK = PLAG MODERATELY MICROPHYRIC BASALT; Texture: MODERATELY MICROPHYRIC,FINE-GRAINED,SUBTRACHYTIC WITH FLOWAGE ALIGNMENT OF SMALL PLAG LATHS* Phenocrysts- PLAGIOCLASE ( 5%) Size(mm): .5 AVERAGE SIZE GIVEN,RARE GRAINS UP TO 1.5MM,CORES REPLACED BY CHLORITE AND CALCITE,PHENOS ASSOCIATED WITH IDDINGSITIZED OL PSEUDOMOPRHS CONTAINING REDDISH-BROWN SPINEL* Groundmass - OLIVINE PSEUDOMORPHED BY IDDINGSITE; PLAGIOCLASE PYROXENE INTERSTITIAL AREAS TO LATHS CONTAIN "HERRINGBONE" PYX NUCLEATED ON PLAG,SUBSEQUENTLY ALTERED TO A REDDISH-BROWN MINERAL* Alteration - IDDINGSITE Replacing: OL CALCITE Location: VEINS SECONDARY VEINS OF PLATY CALCITE CUT THROUGH ROCK* |
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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