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Index to Marine and Lacustrine Geological Samples

Repository: URI Latitude: 12.14335 to 12.148
Ship: Thomas G. Thompson Longitude: 143.92676 to 143.93164
Cruise: TN273 Water Depth(m): 4545 to 4472
Sample: TN273-36D Date: 20120116 to 20120116
Device: dredge, rock PI: Katherine Kelly
Storage: room temperature, dry IGSN: URI900271

100kg of lava. 1/3 bag full of pillow lavas and altered lava; pipe dredge full of same. Collected from a forearc rift, SE Mariana forearc rift, deep scarp in SE.

Contact URI TN273 data at R2R
1 :    IGSN URI900272  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-01. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 19cm in size
2 :    IGSN URI900273  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-02. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 14cm in size
3 :    IGSN URI900274  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-03. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 15cm in size
4 :    IGSN URI900275  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-04. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 13cm in size
5 :    IGSN URI900276  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-05. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 14cm in size
6 :    IGSN URI900277  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-06. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 17cm in size
7 :    IGSN URI900278  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-07. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 17cm in size
8 :    IGSN URI900279  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-08. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 12cm in size
9 :    IGSN URI900280  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-09. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 12cm in size
10 :    IGSN URI900281  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-10. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 15cm in size
11 :    IGSN URI900282  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-11. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 8.5cm in size
12 :    IGSN URI900283  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-12. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 9cm in size
13 :    IGSN URI900284  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-01-13. Rift bottom. plagioclase basalt, 5% plagioclase by volume 1-3mm in diameter, 1-3% olivine by volume 1-3mm in diameter, 5% clinopyroxene by volume 1-3mm in diameter, vesicles 5-10% by volume 1-5mm in diameter, porphyritic, 1-5mm thick glassy rind, 1-3mm thick manganese crust, 8cm in size
14 :    IGSN URI900285  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-02-01. Rift bottom. doleritic basalt, plagioclase 40% by volume <1mm in diameter, clinopyroxene 10% by volume <1mm in diameter, olivine 1% by volume 1-3mm in diameter, magnetite-ilmenite 5% by volume, <1mm thick manganese crust, subangular blocks, 20cm in size
15 :    IGSN URI900286  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, plagioclase phyric
Glass and remarks: some samples with fresh glass & Mn/Fe oxide coatings
Comments: Sample TN273-36D-02-02. Rift bottom. doleritic basalt, plagioclase 40% by volume <1mm in diameter, clinopyroxene 10% by volume <1mm in diameter, olivine 1% by volume 1-3mm in diameter, magnetite-ilmenite 5% by volume, <1mm thick manganese crust, subangular blocks, 10cm in size
16 :    IGSN URI900287  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, vesicular (>10% vesicles)
Glass and remarks: notable Mn/Fe oxide coatings
Comments: Sample TN273-36D-03-01. Rift bottom. vesicular basalt, vesicles bimodal: 2% by volume <1mm in diameter 10% by volume 3-8mm in diameter, plagioclase 1% by volume <1mm in diameter, <1mm thick manganese crust, subangular blocks, 17cm in size
17 :    IGSN URI900288  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt, vesicular (>10% vesicles)
Glass and remarks: notable Mn/Fe oxide coatings
Comments: Sample TN273-36D-03-02. Rift bottom. vesicular basalt, vesicles bimodal: 2% by volume <1mm in diameter 10% by volume 3-8mm in diameter, plagioclase 1% by volume <1mm in diameter, <1mm thick manganese crust, subangular blocks, 7cm in size
18 :    IGSN URI900289  
Lithology and Mineralogy: igneous (extrusive/volcanic), basalt
Glass and remarks: notable Mn/Fe oxide coatings
Comments: Sample TN273-36D-04-01. Rift bottom. microcrystalline basalt, fine grained, large alteration rim with fresh core, iron staining in bands 1/3 of the way into rock interior, subangular block, no visible phenocrysts, 12cm in size
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