Miller, D Jay; Cervantes, Pablo (2002): (Table T1) Mineral composition, minor components and alteration characteristics of ODP Hole 176-735B [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.787430, In supplement to: Miller, DJ; Cervantes, P (2002): Sulfide mineral chemistry and petrography and platinum group element composition in gabbroic rocks from the Southwest Indian Ridge. In: Natland, JH; Dick, HJB; Miller, DJ; Von Herzen, RP (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 176, 1-29, https://doi.org/10.2973/odp.proc.sr.176.009.2002
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Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -32.723210 * Longitude: 57.266010
Date/Time Start: 1997-10-24T13:45:00 * Date/Time End: 1997-12-01T19:00:00
Minimum Elevation: -720.6 m * Maximum Elevation: -720.6 m
Event(s):
176-735B * Latitude: -32.723210 * Longitude: 57.266010 * Date/Time Start: 1997-10-24T13:45:00 * Date/Time End: 1997-12-01T19:00:00 * Elevation: -720.6 m * Penetration: 1508 m * Recovery: 865.99 m * Location: Indian Ocean * Campaign: Leg176 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 122 cores; 1003.2 m cored; 504.8 m drilled; 86.3 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Miller, D Jay | DSDP/ODP/IODP sample designation | ||
| 2 | Rock type | Rock | Miller, D Jay | |||
| 3 | Minor components/lithology | Min comp | Miller, D Jay | Electron microprobe (EMP) | tr = troilite, po = pyrrhotite, pn = pentlandite, cpy = chalcopyrite, py = pyrite | |
| 4 | Plagioclase | Pl | % | Miller, D Jay | Electron microprobe (EMP) | |
| 5 | Clinopyroxene | Cpx | % | Miller, D Jay | Electron microprobe (EMP) | |
| 6 | Olivine | Ol | % | Miller, D Jay | Electron microprobe (EMP) | |
| 7 | Orthopyroxene | Opx | % | Miller, D Jay | Electron microprobe (EMP) | |
| 8 | Oxides | Oxides | % | Miller, D Jay | Electron microprobe (EMP) | |
| 9 | Alteration | Alteration | Miller, D Jay | CPX = clinopyroxene | ||
| 10 | Comment | Comment | Miller, D Jay |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
267 data points
Data
| 1 Sample label | 2 Rock | 3 Min comp | 4 Pl [%] | 5 Cpx [%] | 6 Ol [%] | 7 Opx [%] | 8 Oxides [%] | 9 Alteration | 10 Comment |
|---|---|---|---|---|---|---|---|---|---|
| 176-735B-90R-1,123-125 | Medium coarse-grained, leucocratic olivine gabbro | trace sulfides (po > tr > pn > cpy > py), trace oxides (sulfides > oxides), trace amphibole | 78 | 12 | 10 | Olivine <5% altered to smectite (50%), amphibole (40%), talc (5%), and magnetite (5%). Clinopyroxene and plagioclase <1% altered to amphibole. | |||
| 176-735B-90R-4,42-45 | Medium-grained, leucocratic olivine gabbro | trace sulfides (po > pn > cpy), trace oxides (sulfides > oxides), trace amphibole | 70 | 15 | 15 | Olivine 30% altered to smectite (40%), amphibole (40%), talc (15%), and magnetite (5%). CPX 20% altered to amphibole, plagioclase 5% to amphibole | |||
| 176-735B-90R-6,72-77 | Coarse-grained troctolite | trace sulfides (po > tr > pn > cpy > py), trace oxides (sulfides > oxides), trace amphibole | 60 | 5 | 35 | Olivine 20% altered to amphibole (60%) smectite (20%), talc (15%), and magnetite (5%). CPX 20% altered to amphibole, plagioclase 5% to amphibole. | |||
| 176-735B-91R-1,106-111 | Medium-grained troctolite | <1% sulfides (po > pn > cpy > py), trace oxides (sulfides > oxides) | 45 | 5 | 50 | Olivine 5% altered to amphibole (80%), talc (15%), and magnetite (5%). CPX 15% altered to amphibole, plagioclase 5% altered to amphibole | |||
| 176-735B-101R-3,82-87 | Coarse-grained, oxide-bearing olivine gabbro | 2% oxides (predominantly ilmenite), trace sulfides (po > cpy > pn > py) | 55 | 35 | 8 | 2.0 | Olivine 15% altered to amphibole (90%), talc (5%), magnetite (5%). CPX 10% altered to amphibole, plagioclase 5% altered to amphibole. | ||
| 176-735B-114R-1,84-90 | Coarse-grained, oxide gabbronorite | 10% oxides (predominantly ilmenite), <1% olivine, trace sulfides (po > cpy > py > pn) | 45 | 30 | 15 | 10.0 | Olivine 40% altered to smectite (65%), amphibole (20%), talc 10%, magnetite (5%) | ||
| 176-735B-121R-6,37-42 | Coarse-grained oxide gabbro | trace olivine,trace sulfides along grain boundaries (py > po > cpy > pn) intergrown with trace oxides and brown amphibole | 35 | 60 | 5.0 | Clinopyroxene 25% altered to amphibole | |||
| 176-735B-123R-4,106-111 | Medium-grained, olivine gabbro | trace sulfides (common along grain boundaries, tr > po > cpy > pn > py) | 55 | 35 | 10 | Olivine 5% altered to smectite (60%), amphibole (35%), magnetite (5%). Plagioclase and CPX only slightly altered (2%) to amphibole | |||
| 176-735B-124R-1,48-53 | Medium- to coarse-grained olivine gabbro | trace oxides and sulfides (po > cpy > pn > py) | 55 | 35 | 10 | Olivine 5% altered to smectite (60%) amphibole (35%), and magnetite. Plagioclase and CPX 23% altered to amphibole | |||
| 176-735B-127R-3,113-117 | Coarse-grained oxide and orthopyroxene bearing olivine gabbro | 50 | 30 | 10 | 2 | 3.0 | Olivine 5% altered to amphibole > smectite > talc > magnetite. CPX and plagioclase <2% altered to amphibole. Trace sulfides (po > cpy > pn > py). | ||
| 176-735B-132R-1,107-112 | Leucocratic oxide and olivine bearing gabbro | trace sulfides (po > cpy > pn > py) | 80 | 15 | 2 | 3.0 | Olivine 30% altered (70% amphibole, 15% smectite, 10% talc, and 5% magnetite). CPX 10% altered to amphibole, plagioclase 2% altered to amphibole | ||
| 176-735B-133R-5,82-87 | Coarse-grained olivine gabbro | trace oxides and sulfides (po > cpy > pn > py) | 15 | 60 | 25 | Olivine is 10% altered to smectite with minor (<10%) magnetite. CPX is 5% altered to amphibole, plagioclase is<1% altered to amphibole | |||
| 176-735B-134R-5,70-75 | Coarse-grained olivine gabbro | trace oxides > sulfides (tr > po > cpy > pn > py) | 50 | 30 | 20 | Olivine 5% altered to smectite (85%), magnetite (10%), and amphibole (5%). CPX 3% altered to amphibole, plagioclase <1% altered to amphibole | |||
| 176-735B-137R-3,126-130 | Medium-grained olivine gabbro | trace sulfides (po > cpy > pn > py) and oxides | 60 | 25 | 15 | Olivine 5% altered to smectite (60%), amphibole (35%), and magnetite (5%). CPX 5% altered to amphibole, plagioclase 1% altered to amphibole | |||
| 176-735B-137R-6,52-58 | Medium coarse-grained olivine bearing oxide gabbronorite | trace sulfides (po > cpy > py) | 55 | 25 | 2 | 13 | 5.0 | Olivine 30% altered to talc (50%) and magnetite (50%), minor smec and amph. OPX 20% altered to amph, CPX 10% altered to amph, plagiocl 1% to amph | |
| 176-735B-138R-7,48-53 | Medium-grained oxide bearing olivine gabbro | trace sulfides (po > cpy > pn > py) | 52 | 37 | 10 | 1.0 | Olivine 5% altered to smectite (50%), magnetite (30%), amphibole (10%), and minor talc. CPX 5% altered to amphibole, plagioclase 1% to amphibole | ||
| 176-735B-140R-4,34-40 | Coarse-grained olivine gabbro | trace oxides and sulfides (po > cpy > pn > py) | 40 | 50 | 10 | Only trace alteration of olivine to smectite, amphibole, and magnetite, and trace alteration of CPX and plagioclase to amphibole. | |||
| 176-735B-144R-1,145-150 | Orthopyroxene bearing oxide gabbro | <1% sulfides (po > py > cpy > pn) | 40 | 50 | 3 | 7.0 | Pyroxenes are 10% altered to amphibole, plagioclase is 5% altered to amphibole | ||
| 176-735B-144R-4,66-71 | Oxide bearing olivine gabbro | trace sulfides (po > cpy > pn > py) | 52 | 40 | 7 | 1.0 | Olivine is 3% altered to smectite (60%), amphibole (30%) and magnetite (10%) | Plagioclase and pyroxene are 3% altered to amphibole | |
| 176-735B-146R-4,118-122 | Coarse-grained olivine gabbro | trace oxides and sulfides (po > cpy > pn > py) | 52 | 35 | 13 | Olivine is slightly altered (2%) to smectite (60%), amphibole (30%), and magnetite (10%) | Pyroxene and plagioclase are slightly altered 2% to amphibole. Plagioclase <1% altered to amphibole | ||
| 176-735B-147R-4,6-15 | Medium- to coarse-grained oxide bearing olivine gabbro | trace sulfides (po > cpy > pn > py) | 64 | 14 | 20 | 2.0 | Oxide occurs in clusters as matrix surrounding rounded clinopyroxene crystals. Olivine <1% altered to smectite (80%) and magnetite (10%) | , clinopyroxene partially recrystallized but <2% altered to amphibole | |
| 176-735B-147R-6,45-51 | Medium-grained olivine gabbro | trace oxides and rare sulfides (py > po > cpy) | 64 | 27 | 8 | Olivine is slightly altered (2%) to smectite (95%) and magnetite (5%). Clinopyroxene is slightly (2%) altered to amphibole | Plagioclase is, for the most part, recrystallized and slightly altered (2%) to amphibole | ||
| 176-735B-159R-1,121-125 | Coarse-grained olivine gabbro | trace oxides and sulfides (po > cpy > py > pn) | 54 | 40 | 6 | Olivine 5% altered to amphibole (90%), smectite (5%), magnetite (5%), and minor talc | Clinopyroxene 5% altered to amphibole, plagioclase 1% altered to amphibole | ||
| 176-735B-171R-3,62-67 | Medium-grained oxide and olivine bearing gabbro | trace sulfides (po > cpy > pn > py) | 48 | 47 | 4 | 1.0 | Olivine 3% altered to smectite (65%), amphibole (30%), and magnetite (5%) | Clinopyroxene 5% altered to amphibole, plagioclase 1% altered to amphibole | |
| 176-735B-173R-2,108-113 | Coarse-grained olivine gabbro | trace oxides and sulfides (po > cpy > pn > py) | 60 | 25 | 15 | Olivine 10% altered to smectite (90%), amphibole (5%), and magnetite (5%) | Clinopyroxene 5% altered to amphibole, plagioclase 1% altered to amphibole | ||
| 176-735B-175R-1,87-92 | Coarse-grained olivine gabbro | trace oxides and sulfides (po > cpy > pn > py) | 60 | 30 | 10 | Olivine 2% altered to smectite with traces of amphibole and magnetite | Clinopyroxene and plagioclase <1% altered to amphibole | ||
| 176-735B-175R-1,115-120 | Coarse-grained oxide bearing olivine gabbro | trace sulfides (po > cpy > py > pn) | 55 | 35 | 8 | 2.0 | Oxides commonly occur as vermicular intergrowths with altered olivine (10% to amphibole 50%, smectite 20%, magnetite 20%) | Plagioclase and clinopyroxene 2% altered to amphibole | |
| 176-735B-189R-5,1-4 | Fine- to medium-grained olivine gabbro | trace oxides and sulfides (tr > po > cpy > pn > py) | 55 | 38 | 7 | Olivine trace alteration to smectite and minor magnetite | Plagioclase and pyroxene virtually fresh, only a trace of alteration to amphibole | ||
| 176-735B-191R-2,2-7 | Contact between medium-grained olivine gabbro and coarse-grained gabbro | Olivine gabbro: trace of oxides and sulfides with po > cpy > pn > py | 55 | 30 | 15 | Olivine is 10% altered to smectite (80%), amphibole (10%), and magnetite (5%). CPX is 10% altered to amphibole, plagioclase 1% altered to amphibole | CPX in gabbro is 40% altered to amphibole (0-100% in different crystals). Plagiocl is 5% altered to amphibole, part. where in contact with altered CPX | ||
| 176-735B-199R-6,115-120 | Coarse-grained olivine gabbro | trace of sulfides (po > cpy > py) | 55 | 32 | 8 | 0.5 | Olivine is 5% altered to smectite (80%), amphibole, (15%), and magnetite (5%) | Clinopyroxene and plagioclase show a trace of alteration to amphibole | |
| 176-735B-200R-1,12-16 | Coarse-grained olivine gabbro | trace oxides and sulfides (po > cpy > pn > py) but higher abundance of cpy and pn than most other samples | 35 | 30 | 35 | Olivine 5% altered to amphibole (70%), smectite (25%), and magnetite (1%) | Clinopyroxene 2% altered to amphibole, plagioclase <1% altered to amphibole | ||
| 176-735B-201R-5,9-16 | Coarse-grained gabbro | trace oxides and sulfides (po > pn > cpy > py) and sulfides > oxides | 65 | 35 | Clinopyroxene and plagioclase 5% altered to amphibole with minor smectite | ||||
| 176-735B-203R-1,11-13 | Coarse-grained oxide and sulfide bearing clinopyroxenite (po > cpy > pn) | Sulfides and oxides are ameoboid clusters randomly distributed between the rounded edges of clinpyroxene grains | In this section sulfides are 3-4 mod% of the rock. An adjacent billet has no visible sulfides, this section could show a higher abundance of sulfides | ||||||
| 176-735B-207R-1,18-24 | Medium- to fine-grained olivine gabbro | trace of oxides and sulfides (po > cpy > pn > py) | 60 | 35 | 5 | Olivine 20% altered to smectite (70%), amphibole (20%), talc (5%), and magnetite (5%). Plagioclase and CPX 1% altered to amphibole | |||
| 176-735B-210R-4,60-63 | Coarse-grained olivine gabbro | trace oxides and sulfides (po > cpy > pn > py) | 40 | 45 | 15 | Olivine 10% altered to smectite (85%), amphibole (10%), magnetite (5%). CPX 5% altered to amphibole, plagioclase 1% altered to amphibole |