From: The Atlantis Bank Gabbro Massif, Southwest Indian Ridge
Lithology | N | % | C-P | 1σ | Brittle | 1σ | Oxide % | 1σ |
---|---|---|---|---|---|---|---|---|
Metaperidotite | 115 | 43.4 | 2.3 | 1.5 | Â | Â | Â | Â |
Plagioclase peridotite | 9 | 3.4 | 1 | 0.5 | Â | Â | Â | Â |
Lherzolite | 108 | 40.8 | 0.7 | 0.8 | Â | Â | Â | Â |
Harzburgite | 10 | 3.8 | 1 | 0.5 | Â | Â | Â | Â |
Talc-soapstone-serpentinite-tremolite schist and breccia | 23 | 8.7 | nd | nd | Â | Â | Â | Â |
Total peridotites | 265 | 28.3 | 1.4 | 1.4 | Â | Â | Â | Â |
Olivine websterite | 6 | 0.6 | 0.8 | 0.8 | Â | Â | Â | Â |
Dunite | 3 | 0.3 | nd | nd | Â | Â | Â | Â |
Troctolite | 1 | 0.2 | 0.7 | na | Â | Â | Â | Â |
Olivine gabbro | 156 | 33.9 | 1.2 | 1.2 | 1.2 | 1.4 | Â | Â |
Gabbro | 36 | 7.8 | 1.8 | 1.1 | 2.2 | 1.8 | Â | Â |
Gabbronorite | 21 | 4.6 | 1.6 | 0.7 | 0.7 | 0.4 | Â | Â |
Oxide gabbro | 183 | 39.8 | 1.8 | 1.5 | 0.8 | 1 | 6.7 | 1.5 |
Metagabbro | 41 | 8.9 | 2.3 | 1.3 | 2.3 | 1.6 | Â | Â |
Felsic vein/plagiogranite | 22 | 4.8 | 0.5 | 0.8 | 0.6 | 0.7 | Â | Â |
Total gabbros | 460 | 49.1 | Â | Â | Â | Â | Â | Â |
Aphyric diabase | 86 | 56.2 | Â | Â | Â | Â | Â | Â |
Olivine diabase | 5 | 3.3 | Â | Â | Â | Â | Â | Â |
Plagioclase-olivine diabase | 18 | 11.8 | Â | Â | Â | Â | Â | Â |
Plagioclase diabase | 44 | 28.8 | Â | Â | Â | Â | Â | Â |
Total diabase | 153 | 16.3 | 0 | 0 | 1.7 | 1.3 | Â | Â |
Aphyric basalt | 20 | 44.4 | Â | Â | Â | Â | Â | Â |
Olivine basalt | 7 | 15.6 | Â | Â | Â | Â | Â | Â |
Plagioclase-olivine basalt | 11 | 24.4 | Â | Â | Â | Â | Â | Â |
Plagioclase-olivine augite basalt | 1 | 2.2 | Â | Â | Â | Â | Â | Â |
Plagioclase basalt | 6 | 13.3 | Â | Â | Â | Â | Â | Â |
Total basalt | 45 | 4.8 | Â | Â | Â | Â | Â | Â |
Pillow basalt | 19 | Â | Â | Â | Â | Â | Â | Â |
Mafic mylonite/cataclasite | 3 | 0.3 | Â | Â | Â | Â | Â | Â |
Oxidized sulfide chimney | 2 | 0.2 | Â | Â | Â | Â | Â | Â |