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 STA01 RD33
Device: dredge, rock
Latitude: -42.1155
Longitude: 88.04233
Water Depth(m): 2524 to 2375
Date: 19960226
PI: Kevin Johnson
Storage: room temperature, dry
Province: rise or ridge, aseismic ocean

Southeast Indian Ridge; Sampling locale: Small spur on median valley wall ~150m high, segment L.
1 :   
Comments: Sample Type: Pillow basalt. Mineralogy: Sparse Plagioclase in glass and rock. Weathering: Mn crust. ~50% of glass is fresh. 1 bucket. Recovery about 7 kg. Probe glass taken from both samples. Glass splits taken for KJ and DG from 33-1. Both samples in bucket. Type 1 from this dredge. 33-1 is glassy pillow toe with Mn coating and a glassy rind ~1cm thick completely surrounding an aphyric core containing sparse (<<1%) plag phenocrysts. About half the glass is still left on the archived rock sample. 33-2 similar as 33-1, most likely a chip.
2 :   
Comments: Sample Type: pillow basalt. Mineralogy: Sparse Plagioclase and olivine in rock. Weathering: Moderate to heavy. Glass condition: Some fresh glass and Mn/Fe oxide coatings. 1 bucket. Recovery from dredge about 7 kg. Probe glass taken from sample. Glass seperated for KJ. Sample in bucket. 33-3 is an angular pillow basalt with a thin glass rind and yellow alteration staining. Sparse plagioclase and olivine phenocrysts in the rocks. Type 2 from this dredge.
3 :   
Comments: Sample Type: Bulk glass. Mineralogy: Some of the glass contains plag phenocrysts. Weathering: Light to heavy. Glass condition: Some fresh glass and Mn/Fe oxide coatings. 1 bucket. Recovery from dredge 33 about 7 kg.Sample in bucket. Small amount of bulk glass. Some containing phenocrysts, some not. Most of the glass has a Mn coating.
_