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: TN273-37D
Device: dredge, rock
Latitude: 12.16671 to 12.16673
Longitude: 144.00862 to 144.01666
Water Depth(m): 4570 to 4256
Date: 20120116 to 20120117
PI: Katherine Kelly
IGSN: URI900290
Storage: room temperature, dry

15kg of peridotite. 1/4 bag full of peridotite. Collected from a forearc rift, SE Mariana forearc rift, deep scarp in SE.
1 :    IGSN URI900291  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-01. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 16cm in size
2 :    IGSN URI900292  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-02. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 21cm in size
3 :    IGSN URI900293  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-03. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 20cm in size
4 :    IGSN URI900294  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-04. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 10cm in size
5 :    IGSN URI900295  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-05. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 15cm in size
6 :    IGSN URI900296  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-06. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 14cm in size
7 :    IGSN URI900297  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-07. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 15cm in size
8 :    IGSN URI900298  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-08. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 15cm in size
9 :    IGSN URI900299  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-09. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 16cm in size
10 :    IGSN URI900300  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-10. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock,
11 :    IGSN URI900301  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-11. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 16cm in size
12 :    IGSN URI900302  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-12. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, 17cm in size
13 :    IGSN URI900303  
Lithology/Mineralogy: igneous (intrusive/plutonic), gabbro
Comments: Sample TN273-37D-01-13. Rift bottom. serpentized troctolitic gabbro, coarsely crystalline, equigranular, plagioclase 30% by volume, serpentinized olivine 70% by volume, clinopyroxene <1% by volume, minerals 1-3mm in diameter, minor veins of white mineral (possibly calcite), intrusive rock, assorted pieces
14 :    IGSN URI900304  
Lithology/Mineralogy: igneous (hypabyssal), diabase
Comments: Sample TN273-37D-02-01. Rift bottom. coarse grained basaltic diabase, plagioclase 30% by volume, clinopyroxene 60% by volume, olivine 10% by volume, minerals <1mm in diameter, intrusive diabase texture, equigranular, 21cm in size
15 :    IGSN URI900305  
Lithology/Mineralogy: igneous (hypabyssal), diabase
Comments: Sample TN273-37D-02-02. Rift bottom. coarse grained basaltic diabase, plagioclase 30% by volume, clinopyroxene 60% by volume, olivine 10% by volume, minerals <1mm in diameter, intrusive diabase texture, equigranular, 11cm in size
16 :    IGSN URI900306  
Lithology/Mineralogy: igneous (hypabyssal), diabase
Comments: Sample TN273-37D-02-03. Rift bottom. coarse grained basaltic diabase, plagioclase 30% by volume, clinopyroxene 60% by volume, olivine 10% by volume, minerals <1mm in diameter, intrusive diabase texture, equigranular
17 :    IGSN URI900307  
Lithology/Mineralogy: igneous (intrusive/plutonic), serpentinite
Weathering/Metamorphism: weathering - light
Comments: Sample TN273-37D-03-01. Rift bottom. serpentinized peridotite, ropey serpentinized minerals with black veins (<1mm) running unidirectionally, some calcite veins (3-5mm thick) boardered by pink alteration bands (<1mm), 16cm in size
18 :    IGSN URI900308  
Lithology/Mineralogy: igneous (intrusive/plutonic), serpentinite
Weathering/Metamorphism: weathering - light
Comments: Sample TN273-37D-03-02. Rift bottom. serpentinized peridotite, ropey serpentinized minerals with black veins (<1mm) running unidirectionally, some calcite veins (3-5mm thick) boardered by pink alteration bands (<1mm), 11cm in size
19 :    IGSN URI900309  
Lithology/Mineralogy: igneous (intrusive/plutonic), serpentinite
Comments: Sample TN273-37D-03-03. Rift bottom. serpentinized peridotite, ropey serpentinized minerals with black veins (<1mm) running unidirectionally, some calcite veins (3-5mm thick) boardered by pink alteration bands (<1mm), 10cm in size
20 :    IGSN URI900310  
Lithology/Mineralogy: igneous (intrusive/plutonic), serpentinite
Comments: Sample TN273-37D-03-04. Rift bottom. serpentinized peridotite, ropey serpentinized minerals with black veins (<1mm) running unidirectionally, some calcite veins (3-5mm thick) boardered by pink alteration bands (<1mm), fragments
21 :    IGSN URI900311  
Lithology/Mineralogy: igneous (intrusive/plutonic), serpentinite
Comments: Sample TN273-37D-04-01. Rift bottom. serpentinized peridotite, highly fractured, clinopyroxene 80% by volume, orthopyroxene 20% by volume, 1-2mm thick calcite veins, 20cm in size
22 :    IGSN URI900312  
Lithology/Mineralogy: igneous (intrusive/plutonic), serpentinite
Comments: Sample TN273-37D-04-02. Rift bottom. serpentinized peridotite, highly fractured, clinopyroxene 80% by volume, orthopyroxene 20% by volume, 1-2mm thick calcite veins, 10cm in size
23 :    IGSN URI900313  
Lithology/Mineralogy: igneous (intrusive/plutonic), serpentinite
Comments: Sample TN273-37D-04-03. Rift bottom. serpentinized peridotite, highly fractured, clinopyroxene 80% by volume, orthopyroxene 20% by volume, 1-2mm thick calcite veins, fragments
24 :    IGSN URI900314  
Lithology/Mineralogy: sedimentary (detrital/fragmental or clastic), mudstone (lutite)
Comments: Sample TN273-37D-05-01. Rift bottom. manganese coated sediment rock, 7cm in size
25 :    IGSN URI900315  
Lithology/Mineralogy: sedimentary (detrital/fragmental or clastic), mudstone (lutite)
Comments: Sample TN273-37D-05-02. Rift bottom. rock fragments, coarse grained, Mn coted sediment rock
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