Leg, hole:
|
118-735B- | |||||||
|---|---|---|---|---|---|---|---|---|
Core, section: Interval (cm):
|
45R-1
37-44 |
51R-3
110-114 |
51R-3
110-114 |
80R-7
56-65 |
55R-2
110-120 |
54R-4
0-9 |
54R-4
0-9 |
74R-6
0-8 |
| Rock type: | Oxide gabbro | Oxide gabbronorite | ||||||
| Major element oxide (wt%): | ||||||||
| SiO2 | 34.10 | 33.85 | 33.70 | 34.21 | 33.69 | 32.80 | 32.65 | 36.86 |
| TiO2 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Al2O3 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| FeO | 40.28 | 44.49 | 46.58 | 47.95 | 50.28 | 51.47 | 52.35 | 31.27 |
| NiO | 0.00 | 0.00 | 0.00 | 0.04 | 0.07 | 0.00 | 0.04 | 0.00 |
| MnO | 0.63 | 0.71 | 0.74 | 0.73 | 1.00 | 1.02 | 1.47 | 0.63 |
| MgO | 23.64 | 21.38 | 19.30 | 18.25 | 16.09 | 14.41 | 13.17 | 32.11 |
| CaO | 0.05 | 0.00 | 0.00 | 0.07 | 0.09 | 0.10 | 0.08 | 0.07 |
| Total | 98.74 | 100.43 | 100.32 | 101.25 | 101.22 | 99.80 | 99.76 | 100.94 |
| Number of cations based on 4 O: | ||||||||
| Si | 0.9899 | 0.9856 | 0.9930 | 1.0029 | 1.0026 | 1.0008 | 1.0041 | 0.9939 |
| Ti | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 |
| Al | 0.0015 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 |
| Fe+2 | 0.9778 | 1.0832 | 1.1477 | 1.1754 | 1.2512 | 1.3132 | 1.3462 | 0.7050 |
| Ni | 0.0000 | 0.0000 | 0.0000 | 0.0009 | 0.0017 | 0.0000 | 0.0010 | 0.0000 |
| Mn | 0.0154 | 0.0175 | 0.0185 | 0.0181 | 0.0252 | 0.0264 | 0.0383 | 0.0144 |
| Mg | 1.0230 | 0.9281 | 0.8478 | 0.7976 | 0.7139 | 0.6555 | 0.6038 | 1.2908 |
| Ca | 0.0016 | 0.0000 | 0.0000 | 0.0022 | 0.0029 | 0.0033 | 0.0026 | 0.0020 |
| Total | 3.0078 | 3.0144 | 3.0070 | 2.9971 | 2.9974 | 2.9992 | 2.9959 | 3.0061 |
| Fo | 51.1 | 46.1 | 42.5 | 40.4 | 36.3 | 33.3 | 31.0 | 64.7 |
| Fa | 48.9 | 53.9 | 57.5 | 59.6 | 63.7 | 66.7 | 69.0 | 35.3 |