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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

Notes: Average of 3–10 analyses. ND = not detected.

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