World Data Service for Geophysics

Index to Marine and Lacustrine Geological Samples (IMLGS)
an international partnership

doi:10.7289/V5H41PB8


Repository: SOEST [Contact the Curator]
Ship: Melville
Cruise: BMRG06MV
Sample: BMRG06MV STA79 RD73
Device: dredge, rock
Latitude: -36.06633
Longitude: 78.82467
Water Depth(m): 2746 to 2572
Date: 19960331
PI: Kevin Johnson
Storage: room temperature, dry
Province: rise or ridge, aseismic ocean

Southeast Indian Ridge; Sampling locale: wall of central axial valley along segment H.
1 :   
Weathering/Metamorphism: weathering - fresh
Comments: Sample Type: Pillow basalt_Aphyric basalt. Mineralogy: . Weathering: Fresh. Glass condition: >50% fresh glass. 1 bucket. probe glass taken. subsampled by DG. other glass to KJ. 2 smaller unnumbered pieces also included in bubble wrappillow basalt lobes with ~1 cm thick, aphyric, fresh glassy margins on two sides. Type 1 of this dredge.
2 :   
Weathering/Metamorphism: weathering - fresh
Comments: Sample Type: Ol-plg phyric basalt_Sheet flow basalt. Mineralogy: Plagioclase and olivine. Weathering: Fresh. Glass condition: >50% fresh glass. 1 bucket. probe glass taken. subsampled by DG. other glass to KJ. 3 smaller pieces included as unnumbered samples.plagioclase- and olivine-phyric sheet flow basalt pieces with double and triple chilled glassy margins. Type 2 of this dredge.
3 :   
Comments: Sample Type: Pillow basalt. Mineralogy: Olivine and plagioclase. Weathering: Moderate to heavy. Glass condition: Some fresh glass and Mn/Fe oxide coatings. 1 bucket. probe glass taken from 73-6. other glass to KJ. 73-7 whole rock subsampled by KN. ~12 smaller pieces included as unnumbered samples. angular, weathered pillow basalt fragments with phenocrysts of olivine and lesser plagioclase, and yellow and brown alteration staining on interiors. Type 3 of this dredge.
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