Leg, hole:
|
118-735B-
|
176-735B- | 118-735B- |
176-735B-
|
118-735B- | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Core, section: Interval (cm):
|
30R-1
50-56 |
138R-4
59-63 |
189R-7
75-81 |
142R-1
76-80 |
124R-1
111-116 |
147R-5
67-75 |
190R-6
42-48 |
28R-2
76-.83 |
18R-4
139-147 |
31R-1
146-148 |
40R-5
48-52 |
40R-2
103-112 |
157R-4
0-7 |
19R-5
62-73 |
19R-5
62-73 |
Rock type: | Olivine gabbro | Gabbro | Oxide gabbro | Gabbronorite | |||||||||||
Major element oxide (wt%): | |||||||||||||||
SiO2 | 0.02 | 0.16 | 0.17 | 0.22 | 0.19 | 0.24 | 0.19 | 0.00 | 0.00 | 0.04 | 0.14 | 0.04 | 0.16 | 0.09 | 0.04 |
TiO2 | 50.04 | 49.31 | 49.28 | 47.44 | 47.16 | 48.58 | 49.34 | 51.96 | 51.53 | 50.05 | 49.42 | 48.91 | 48.00 | 51.58 | 50.45 |
Fe2O3 | 4.68 | ND | 7.93 | 8.66 | 11.19 | 5.86 | 7.99 | 1.11 | 2.67 | 4.44 | 5.48 | 8.82 | 6.95 | 1.69 | 3.95 |
FeO | 43.45 | 45.93 | 38.61 | 41.41 | 37.61 | 41.45 | 38.09 | 45.30 | 44.26 | 43.45 | 42.14 | 39.92 | 41.35 | 44.63 | 44.22 |
MnO | 0.78 | 0.41 | 0.53 | 0.60 | 0.41 | 1.48 | 0.39 | 0.87 | 0.81 | 0.81 | 0.92 | 0.77 | 1.27 | 1.22 | 0.97 |
MgO | 0.46 | 3.21 | 3.21 | 0.27 | 2.60 | 0.19 | 3.46 | 0.26 | 0.72 | 0.38 | 0.28 | 0.58 | 0.27 | 0.55 | 0.27 |
BaO | ND | 0.00 | 0.00 | 0.79 | 0.23 | 1.35 | 0.00 | ND | ND | ND | ND | ND | 0.91 | ND | ND |
La2O3 | ND | 0.00 | 0.00 | 0.54 | 0.08 | 0.71 | 0.37 | ND | ND | ND | ND | ND | 0.65 | ND | ND |
Total | 99.43 | 99.02 | 99.73 | 99.94 | 99.48 | 99.87 | 99.83 | 99.50 | 99.99 | 99.17 | 98.38 | 99.05 | 99.56 | 99.76 | 99.90 |
Number of cations based on 6 O: | |||||||||||||||
Si | 0.0010 | 0.0079 | 0.0085 | 0.0114 | 0.0097 | 0.0123 | 0.0096 | 0.0000 | 0.0000 | 0.0020 | 0.0070 | 0.0018 | 0.0083 | 0.0045 | 0.0020 |
Ti | 1.9093 | 1.8377 | 1.8433 | 1.8200 | 1.7800 | 1.8700 | 1.8377 | 1.9801 | 1.9493 | 1.9147 | 1.9030 | 1.8620 | 1.8490 | 1.9585 | 1.9192 |
Fe+3 | 0.1787 | 0.2895 | 0.2966 | 0.3321 | 0.4218 | 0.2254 | 0.2976 | 0.0423 | 0.1011 | 0.1699 | 0.2110 | 0.3362 | 0.2679 | 0.0640 | 0.1500 |
Fe+2 | 1.8431 | 1.6205 | 1.6058 | 1.7648 | 1.5756 | 1.7731 | 1.5773 | 1.9193 | 1.8614 | 1.8480 | 1.8034 | 1.6902 | 1.7709 | 1.8840 | 1.8702 |
Mn | 0.0335 | 0.0173 | 0.0223 | 0.0259 | 0.0176 | 0.0643 | 0.0164 | 0.0373 | 0.0345 | 0.0349 | 0.0400 | 0.0330 | 0.0550 | 0.0522 | 0.0415 |
Mg | 0.0348 | 0.2369 | 0.2235 | 0.0202 | 0.1943 | 0.0147 | 0.2550 | 0.0196 | 0.0540 | 0.0288 | 0.0210 | 0.0440 | 0.0210 | 0.0410 | 0.0200 |
Ba | ND | 0.0000 | 0.0000 | 0.0159 | 0.0045 | 0.0270 | 0.0000 | ND | ND | ND | ND | ND | 0.0182 | ND | ND |
La | ND | 0.0000 | 0.0000 | 0.0102 | 0.0016 | 0.0134 | 0.0068 | ND | ND | ND | ND | ND | 0.0122 | ND | ND |
Total | 4.0004 | 4.0098 | 4.0000 | 4.0005 | 4.0051 | 4.0002 | 4.0004 | 3.9986 | 4.0003 | 3.9983 | 3.9854 | 3.9672 | 4.0025 | 4.0042 | 4.0029 |
Notes: Fe2O3 contents are calculated stoichiometrically. ND = not determined.