World Data Service for Geophysics

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

doi:10.7289/V5H41PB8


Repository: URI [Contact the Curator]
Ship: Thomas G. Thompson
Cruise: TN273
Sample: TN273-19D
Device: dredge, rock
Latitude: 12.25734 to 12.2586
Longitude: 143.81405 to 143.81255
Water Depth(m): 4430 to 4320
Date: 20120109 to 20120109
PI: Katherine Kelly
IGSN: URI900130
Storage: room temperature, dry

8kg of lava. Several pieces in pipe dredge and one large piece in dredge bag. Collected from a forearc rift, SE Mariana forearc rift, volcanic mound midway to trench.
1 :    IGSN URI900131  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, vesicular (>10% vesicles)
Comments: Sample TN273-19D-01-01. Rift bottom. porphyritic, vesicular basalt with 10% plagioclase <4 mm in diameter, 3% olivine <2 mm in diameter, 1% clinopyroxene <2 mm in diameter, pillow flow patterns visible, altered surfaces
2 :    IGSN URI900132  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, vesicular (>10% vesicles)
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-19D-01-02. Porphyritic, vesicular basalt with 10% plagioclase <4 mm in diameter, 3% olivine <2 mm in diameter, 1% clinopyroxene <2 mm in diameter, pillow flow patterns visible, altered surfaces
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