World Data Service for Geophysics

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


Repository: SOEST [Contact the Curator]
Ship: Melville
Cruise: BMRG06MV
Sample: BMRG06MV STA68 RD67
Device: dredge, rock
Latitude: -37.5775
Longitude: 78.092
Water Depth(m): 1940 to 1790
Date: 19960326
PI: Kevin Johnson
Storage: room temperature, dry
Province: rise or ridge, aseismic ocean

Southeast Indian Ridge; Sampling locale: small cone in axial valley of second en echelon segment northeast of segment I2.
1 :   
Weathering/Metamorphism: weathering - light
Comments: Sample Type: Sheet flow basalt. Mineralogy: Plagioclase and olivine. Weathering: Light. Glass condition: >50% fresh glass and Mn/Fe oxide coatings. 2 buckets.Glass taken for probe. 67-1 and 67-3 subsampled by DG. Remaining glass to KJ. 67-3 whole rock sub- sampled by KN.Plagioclase-phyric lobate flows and lava buds also containing olivine and having glass rinds up to ~1 cm thick and outer coatings of Fe/Mn oxides. Samples are dense and noticeably heavier than normal. Type 1 of 1 in this dredge.