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: TN273-30D
Device: dredge, rock
Latitude: 12.46001 to 12.46589
Longitude: 143.80327 to 143.80612
Water Depth(m): 3954 to 3822
Date: 20120113 to 20120113
PI: Katherine Kelly
IGSN: URI900189
Storage: room temperature, dry

200kg of lava. 1 large hydrothermally altered rock and several small rocks, small rock fragments in pipe dredge. Collected from a forearc rift, SE Mariana forearc rift, small ridge on E side of SEMFR.
1 :    IGSN URI900190  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, pillow
Glass/remarks:notable Mn/Fe oxide coatings
Comments: Sample TN273-30D-01-01. Rift bottom. pillow basalts, <1mm thick friable mangansese crust, glassy rind/quench margine 3-5mm thick with <1mm Mn coating; bimodal vesicles 10% by volume <1mm in diameter and 1% by volume 5mm in diameter, 12cm in size
2 :    IGSN URI900191  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, pillow
Glass/remarks:notable Mn/Fe oxide coatings
Comments: Sample TN273-30D-01-02. Rift bottom. pillow basalts, <1mm thick friable manganese crust, glassy rind/quench margine 3-5mm thick with <1mm Mn coating; bimodal vesicles 10% by volume <1mm in diameter and 1% by volume 5mm in diameter, 10cm in size
3 :    IGSN URI900192  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt, pillow
Glass/remarks:notable Mn/Fe oxide coatings
Comments: Sample TN273-30D-01-03. Rift bottom. pillow basalts, <1mm thick friable manganese crust, glassy rind/quench margine 3-5mm thick with <1mm Mn coating; bimodal vesicles 10% by volume <1mm in diameter and 1% by volume 5mm in diameter, 10cm in size
4 :    IGSN URI900193  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-30D-02-01. Rift bottom. porphyritic, basalt with 15% olivine (1-5mm in diameter) and 10% plagioclase (1-3mm in diameter), <1mm thick manganese crust and weathered outside, 2-3mm thick glassy rind, extreme hydrothermal alteration along cracks but fresh interior, 55cm in size
5 :    IGSN URI900194  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-30D-02-02. Rift bottom. porphyritic, basalt with 15% olivine (1-5mm in diameter) and 10% plagioclase (1-3mm in diameter), <1mm thick manganese crust and weathered outside, 2-3mm thick glassy rind, 24cm in size
6 :    IGSN URI900195  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-30D-02-03. Rift bottom. porphyritic, basalt with 15% olivine (1-5mm in diameter) and 10% plagioclase (1-3mm in diameter), <1mm thick manganese crust and weathered outside, 2-3mm thick glassy rind, 23cm in size
7 :    IGSN URI900196  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-30D-02-04. Rift bottom. porphyritic, basalt with 15% olivine (1-5mm in diameter) and 10% plagioclase (1-3mm in diameter), <1mm thick manganese crust and weathered outside, 2-3mm thick glassy rind, 19cm in size
8 :    IGSN URI900197  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-30D-02-05. Rift bottom. porphyritic, basalt with 15% olivine (1-5mm in diameter) and 10% plagioclase (1-3mm in diameter), <1mm thick manganese crust and weathered outside, 2-3mm thick glassy rind, 15cm in size
9 :    IGSN URI900198  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-30D-02-06. Rift bottom. porphyritic, basalt with 15% olivine (1-5mm in diameter) and 10% plagioclase (1-3mm in diameter), <1mm thick manganese crust and weathered outside, 2-3mm thick glassy rind, 14cm in size
10 :    IGSN URI900199  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-30D-02-07. Rift bottom. porphyritic, basalt with 15% olivine (1-5mm in diameter) and 10% plagioclase (1-3mm in diameter), <1mm thick manganese crust and weathered outside, 2-3mm thick glassy rind, 20cm in size
11 :    IGSN URI900200  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-30D-02-08. Rift bottom. porphyritic, basalt with 15% olivine (1-5mm in diameter) and 10% plagioclase (1-3mm in diameter), <1mm thick manganese crust and weathered outside, 2-3mm thick glassy rind, 19cm in size
12 :    IGSN URI900201  
Lithology/Mineralogy: igneous (extrusive/volcanic), basalt
Weathering/Metamorphism: weathering - moderate
Glass/remarks:some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-30D-02-09. Rift bottom. porphyritic, basalt with 15% olivine (1-5mm in diameter) and 10% plagioclase (1-3mm in diameter), <1mm thick manganese crust and weathered outside, 2-3mm thick glassy rind, 6cm in size
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