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: TN273-31D
Device: dredge, rock
Latitude: 12.3888 to 12.39131
Longitude: 143.78376 to 143.78604
Water Depth(m): 3524 to 3434
Date: 20120115 to 20120115
PI: Katherine Kelly
IGSN: URI900202
Storage: room temperature, dry

8kg of lava/sediment. 1 large rock, 4 small (~10cm sized rocks), brown sediment in pipe dredge. Collected from a forearc rift, SE Mariana forearc rift, bottom of ridge from caldera 2.
1 :    IGSN URI900203  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-31D-01-01. Rift bottom. basalt with 5% by volume 1-2mm in diameter olivine, <1mm thick manganese crust, bimodal vesicles: 1% by volume 2-5mm in diameter, 5% by volume <1mm in diameter; 33cm in size
2 :    IGSN URI900204  
Lithology/Mineralogy: sedimentary (chemical), Mn/Fe oxide crusts and nodules
Comments: Sample TN273-31D-01-02. Rift bottom. basalt with 5% by volume 1-2mm in diameter olivine, <1mm thick manganese crust, bimodal vesicles: 1% by volume 2-5mm in diameter, 5% by volume <1mm in diameter; 13cm in size
3 :    IGSN URI900205  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, vesicular (>10% vesicles)
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-31D-01-03. Rift bottom. basalt with 5% by volume 1-2mm in diameter olivine, <1mm thick manganese crust, bimodal vesicles: 1% by volume 2-5mm in diameter, 5% by volume <1mm in diameter; 11cm in size
4 :    IGSN URI900206  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, vesicular (>10% vesicles)
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-31D-01-04. Rift bottom. basalt with 5% by volume 1-2mm in diameter olivine, <1mm thick manganese crust, bimodal vesicles: 1% by volume 2-5mm in diameter, 5% by volume <1mm in diameter; 7cm in size
5 :    IGSN URI900207  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, pillow
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-31D-01-05. Rift bottom. basalt with 5% by volume 1-2mm in diameter olivine, <1mm thick manganese crust, bimodal vesicles: 1% by volume 2-5mm in diameter, 5% by volume <1mm in diameter; 6.5cm in size
6 :    IGSN URI900208  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, pillow
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-31D-02-01. Rift bottom. silty mud about 80% by volume, 20% by volume foraminifera and glass fragments
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