Table T1. Sulfide mineral electron microprobe analyses. (See table notes.)
Core, section, interval (cm) |
Lithology | Depth (mbsf) |
Major elements (wt%) | Mineral component |
|||||
---|---|---|---|---|---|---|---|---|---|
S | Fe | Ni | Cu | Co | Zn | ||||
304-U1309D- | |||||||||
60R-3, 59–62 | Altered troctolite | 313.38 | 38.20 | 2.40 | 57.20 | 1.67 | <0.05 | ND | Polydimite |
27.30 | 1.40 | 73.30 | 0.09 | <0.05 | ND | Heazelwoodite | |||
305-U1309D- | |||||||||
233R-2, 137–140 | Troctolite | 1122.77 | 36.40 | 62.30 | ND | ND | ND | ND | Pyrrhotite |
33.40 | 46.80 | 16.10 | 1.85 | <0.05 | ND | Mackinawite | |||
212R-1, 108–111 | Olivine gabbro | 1021.11 | 38.60 | 59.70 | 0.50 | 0.05 | ND | ND | Pyrrhotite |
35.20 | 29.90 | 0.10 | 33.52 | <0.05 | ND | Chalcopyrite | |||
34.00 | 32.30 | 31.60 | 0.09 | 1.92 | ND | Pentlandite | |||
227R-2, 13–16 | Olivine gabbro | 1093.56 | 36.40 | 62.30 | ND | ND | ND | ND | Pyrrhotite |
34.90 | 32.40 | 0.70 | 32.35 | ND | ND | Chalcopyrite | |||
31.40 | 27.70 | 31.50 | 4.10 | 1.57 | ND | Pentlandite | |||
268R-2, 49–52 | Olivine gabbro | 1289.72 | 37.70 | 60.90 | 0.40 | <0.05 | ND | <0.05 | Pyrrhotite |
34.90 | 30.70 | 0.20 | 33.06 | ND | 0.08 | Chalcopyrite | |||
33.60 | 35.10 | 29.10 | 0.14 | 2.09 | <0.05 | Pentlandite | |||
208R-2, 83–86 | Olivine-bearing gabbro | 1002.91 | 38.40 | 60.00 | 0.20 | ND | ND | ND | Pyrrhotite |
35.20 | 29.70 | ND | 33.62 | ND | ND | Chalcopyrite | |||
33.70 | 33.60 | 30.80 | 0.01 | 2.09 | ND | Pentlandite | |||
223R-4, 11–14 | Gabbro | 1076.76 | 38.10 | 61.10 | 0.40 | <0.05 | 0.00 | 56.20 | Pyrrhotite |
35.00 | 30.30 | ND | 34.22 | 0.00 | ND | Chalcopyrite | |||
33.60 | 33.00 | 31.10 | 0.13 | 2.38 | 0.49 | Pentlandite | |||
33.90 | 9.00 | 0.10 | 0.49 | 0.10 | 56.20 | Sphalerite | |||
262R-1, 27–30 | Oxide-bearing gabbro | 1259.37 | 37.60 | 60.60 | 0.30 | <0.05 | ND | ND | Pyrrhotite |
34.90 | 30.50 | 0.10 | 32.95 | <0.05 | 0.07 | Chalcopyrite | |||
265R-2, 100–103 | Oxide gabbro | 1275.95 | 38.00 | 60.50 | 0.30 | <0.05 | 0.07 | ND | Pyrrhotite |
34.90 | 30.50 | 0.10 | 32.95 | <0.05 | 0.07 | Chalcopyrite | |||
33.10 | 28.90 | 24.70 | 0.07 | 12.57 | ND | Pentlandite |