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 STA06 RD37
Device: dredge, rock
Latitude: -41.00617
Longitude: 85.92517
Water Depth(m): 2750 to 2650
Date: 19960228
PI: Kevin Johnson
Storage: room temperature, dry
Province: rise or ridge, aseismic ocean

Southeast Indian Ridge; Sampling locale: ridge parallel to transform, located just SW of NW end of segment L.
1 :   
Comments: Sample Type: Hyaloclastites_Metabasalt. Mineralogy: Basalt clasts. Weathering: Moderate to heavy. Glass condition:Some fresh glass. 1 bucket. Samples of glass shards taken for microprobe. Cobble from 37-2 (WR) sampled by KN. Volcanic breccia containing rounded clasts of aphyric basalt and minor shards of fresh glass in dark, vesiculated matrix. Type 1 from this dredge.
2 :   
Comments: Sample Type: Hyaloclastites_Metabasalt. Mineralogy: Basalt clasts. Weathering: Very heavy. Glass condition: No glass. 1 bucket. Two hand size pieces. No samples taken for chemistry. Volcanic breccia containing rounded clasts of aphyric basalt in greenish and granular matrix. No glass present. Type 2 from this dredge.
3 :   
Comments: Sample Type: Metabasalt. Mineralogy: . Weathering: Heavy. Glass condition: No glass. Notable Mn/Fe oxide coatings. 1 bucket. KN has whole rock sample of 37-4. One similar unnumbered cobble also included in bag with 37-4. Rounded cobble of metabasalt with dark Mn staining and yellowish coatings (siliceaous ?). Type 4 from this dredge.
4 :   
Comments: Sample Type: Metabasalt. Mineralogy: Sparse plagioclase phenocrysts. Weathering: Moderate to heavy. Glass condition: No glass; Notable Mn/Fe oxide coatings. 1 bucket. Interior of 37-5 subsampled by KN. Two other smaller cobbles of this type also included in dredge bucket. Rounded boulders of metabasalt with dark Mn staining. Type 3 from this dredge.
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