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: TN273-35D
Device: dredge, rock
Latitude: 12.20992 to 12.21491
Longitude: 143.91328 to 143.91416
Water Depth(m): 4046 to 3978
Date: 20120116 to 20120116
PI: Katherine Kelly
IGSN: URI900261
Storage: room temperature, dry

5kg of lava. Pipe dredge full of Mn coated rocks. Collected from a forearc rift, SE Mariana forearc rift, top of mullion block, NW-SE fabric.
1 :    IGSN URI900262  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, olivine phyric
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-35D-01-01. Rift bottom. olivine basalt, 1% by volume olivine 1-3mm in diameter, 5% by volume vesicles 1-2mm in diameter, 1mm thick manganese crust, 2mm thick quench margin, subangular blocks, 10cm in size
2 :    IGSN URI900263  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, olivine phyric
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-35D-01-02. Rift bottom. olivine basalt, 1% by volume olivine 1-3mm in diameter, 5% by volume vesicles 1-2mm in diameter, 1mm thick manganese crust, 2mm thick quench margin, subangular blocks, 6cm in size
3 :    IGSN URI900264  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, olivine phyric
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-35D-01-03. Rift bottom. olivine basalt, 1% by volume olivine 1-3mm in diameter, 5% by volume vesicles 1-2mm in diameter, 1mm thick manganese crust, 2mm thick quench margin, subangular blocks, 13cm in size
4 :    IGSN URI900265  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, olivine phyric
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-35D-01-04. Rift bottom. olivine basalt, 1% by volume olivine 1-3mm in diameter, 5% by volume vesicles 1-2mm in diameter, 1mm thick manganese crust, 2mm thick quench margin, subangular blocks, 13cm in size
5 :    IGSN URI900266  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, olivine phyric
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-35D-01-05. Rift bottom. olivine basalt, 1% by volume olivine 1-3mm in diameter, 5% by volume vesicles 1-2mm in diameter, 1mm thick manganese crust, 2mm thick quench margin, subangular blocks, 10cm in size
6 :    IGSN URI900267  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-35D-02-01. Rift bottom. basalt, plagioclase (20% by volume, 1-3mm in diameter) - olivine (1% by volume, 1-3mm in diameter), 10% by volume vesicles 1-2mm in diameter, 1-2mm thick glassy rind, subangular blocks, 1mm thick manganese crust, 10cm in size
7 :    IGSN URI900268  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-35D-02-02. Rift bottom. basalt, plagioclase (20% by volume, 1-3mm in diameter) - olivine (1% by volume, 1-3mm in diameter), 10% by volume vesicles 1-2mm in diameter, 1-2mm thick glassy rind, subangular blocks, 1mm thick manganese crust, 12cm in size
8 :    IGSN URI900269  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass/remarks:some samples exhibit fresh glass
Comments: Sample TN273-35D-03-01. Rift bottom. microcrystalline basalt with 25% vesicles by volume 1-2mm in diameter, 1mm thick manganese crust, 40% plagioclase by volume <1mm in diameter, 5% clinopyroxene by volume <1mm in diameter, 1mm thick manganese crust, 12 cm in diameter
9 :    IGSN URI900270  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass/remarks:some samples exhibit fresh glass
Comments: Sample TN273-35D-03-02. Rift bottom. microcrystalline basalt with 25% vesicles by volume 1-2mm in diameter, 1mm thick manganese crust, 40% plagioclase by volume <1mm in diameter, 5% clinopyroxene by volume <1mm in diameter, 1mm thick manganese crust, 16 cm in diameter
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