Leg, hole:
|
118-735B- |
176-735B-
|
118-735B-
|
176-735B- | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Core, section: Interval (cm):
|
83R-6
53-59 |
87R-7
0-7 |
87R-7
0-7 |
87R-7
0-7 |
79R-6
105-111 |
91R-1
73-76 |
35R-1
45-47 |
206R-4
139-144 |
178R-4
74-77 |
183R-3
69-78 |
172R-7
124-128 |
188R-5
13-18 |
168R-5
72-78 |
149R-1
56-65 |
144R-6
108-113 |
Rock type: | Troctolite | Troctolitic gabbro | Olivine gabbro | ||||||||||||
Major element oxide (wt%): | |||||||||||||||
SiO2 | 53.41 | 51.99 | 51.84 | 51.90 | 51.75 | 51.37 | 53.15 | 52.34 | 52.26 | 52.02 | 50.27 | 51.95 | 51.08 | 51.04 | 52.71 |
TiO2 | 0.38 | 0.52 | 0.41 | 0.42 | 0.38 | 1.25 | 0.29 | 0.48 | 0.60 | 0.62 | 0.96 | 0.59 | 0.85 | 0.78 | 0.35 |
Al2O3 | 3.09 | 3.33 | 3.34 | 3.32 | 3.36 | 3.90 | 1.05 | 1.99 | 2.87 | 3.07 | 3.23 | 2.90 | 3.24 | 2.26 | 1.11 |
FeO | 5.52 | 5.58 | 4.09 | 6.02 | 6.02 | 3.64 | 12.00 | 9.86 | 7.41 | 7.02 | 8.08 | 6.14 | 7.16 | 8.36 | 9.14 |
Cr2O3 | 0.25 | 0.53 | 0.58 | 0.51 | 0.88 | 0.87 | 0.06 | 0.03 | 0.19 | 0.16 | 0.15 | 0.24 | 0.27 | 0.10 | 0.10 |
MnO | 0.17 | 0.14 | 0.17 | 0.13 | 0.19 | 0.09 | 0.36 | 0.24 | 0.11 | 0.16 | 0.19 | 0.17 | 0.14 | 0.21 | 0.43 |
MgO | 17.37 | 16.93 | 15.89 | 15.89 | 18.88 | 16.57 | 24.38 | 21.34 | 19.54 | 18.11 | 16.53 | 16.37 | 15.31 | 14.40 | 14.05 |
CaO | 19.90 | 20.78 | 22.65 | 23.06 | 17.17 | 22.20 | 8.00 | 14.28 | 17.28 | 18.56 | 18.38 | 22.12 | 21.60 | 21.29 | 22.39 |
Na2O | 0.35 | 0.37 | 0.39 | 0.32 | 0.38 | 0.58 | 0.12 | 0.27 | 0.54 | 0.41 | 0.68 | 0.60 | 0.67 | 0.47 | 0.51 |
Total | 100.44 | 100.17 | 99.36 | 101.57 | 99.01 | 100.48 | 99.41 | 100.83 | 100.79 | 100.12 | 98.47 | 101.07 | 100.31 | 98.91 | 100.79 |
Number of cations based on 6 O: | |||||||||||||||
Si | 1.9367 | 1.9030 | 1.9107 | 1.8901 | 1.9030 | 1.8713 | 1.9441 | 1.9057 | 1.8986 | 1.9047 | 1.8877 | 1.8988 | 1.8895 | 1.9228 | 1.9588 |
Ti | 0.0104 | 0.0143 | 0.0114 | 0.0115 | 0.0105 | 0.0343 | 0.0080 | 0.0131 | 0.0164 | 0.0172 | 0.0270 | 0.0161 | 0.0235 | 0.0221 | 0.0097 |
AlIV | 0.0633 | 0.0970 | 0.0893 | 0.1099 | 0.0970 | 0.1287 | 0.0453 | 0.0855 | 0.1014 | 0.0953 | 0.1123 | 0.1012 | 0.1105 | 0.0772 | 0.0412 |
AlVI | 0.0688 | 0.0466 | 0.0558 | 0.0326 | 0.0487 | 0.0386 | 0.0000 | 0.0000 | 0.0213 | 0.0369 | 0.0306 | 0.0239 | 0.0308 | 0.0230 | 0.0073 |
Fe+2 | 0.1674 | 0.1708 | 0.1260 | 0.1834 | 0.1851 | 0.1109 | 0.3670 | 0.3003 | 0.2250 | 0.2148 | 0.2537 | 0.1875 | 0.2214 | 0.2633 | 0.2839 |
Cr | 0.0072 | 0.0153 | 0.0169 | 0.0147 | 0.0256 | 0.0249 | 0.0017 | 0.0009 | 0.0054 | 0.0045 | 0.0044 | 0.0070 | 0.0078 | 0.0030 | 0.0030 |
Mn | 0.0052 | 0.0043 | 0.0053 | 0.0040 | 0.0059 | 0.0027 | 0.0112 | 0.0073 | 0.0034 | 0.0049 | 0.0061 | 0.0054 | 0.0044 | 0.0068 | 0.0137 |
Mg | 0.9390 | 0.9238 | 0.8731 | 0.8627 | 1.0351 | 0.8999 | 1.3294 | 1.1582 | 1.0580 | 0.9887 | 0.9256 | 0.8918 | 0.8446 | 0.8088 | 0.7786 |
Ca | 0.7731 | 0.8149 | 0.8944 | 0.8997 | 0.6764 | 0.8664 | 0.3135 | 0.5575 | 0.6724 | 0.7281 | 0.7394 | 0.8662 | 0.8559 | 0.8594 | 0.8912 |
Na | 0.0694 | 0.0718 | 0.0768 | 0.0611 | 0.0741 | 0.1093 | 0.0242 | 0.0522 | 0.1034 | 0.0799 | 0.1344 | 0.1155 | 0.1296 | 0.0950 | 0.1061 |
Total | 4.0404 | 4.0619 | 4.0597 | 4.0696 | 4.0614 | 4.0871 | 4.0444 | 4.0807 | 4.1054 | 4.0751 | 4.1211 | 4.1134 | 4.1180 | 4.0814 | 4.0935 |
En | 50.0 | 48.4 | 46.1 | 44.4 | 54.5 | 47.9 | 66.1 | 57.4 | 54.1 | 51.2 | 48.3 | 45.9 | 44.0 | 41.9 | 39.9 |
Fe | 8.9 | 8.9 | 6.7 | 9.4 | 9.8 | 5.9 | 18.3 | 14.9 | 11.5 | 11.1 | 13.2 | 9.6 | 11.5 | 13.6 | 14.5 |
Wo | 41.1 | 42.7 | 47.2 | 46.2 | 35.7 | 46.2 | 15.6 | 27.7 | 34.4 | 37.7 | 38.5 | 44.5 | 44.5 | 44.5 | 45.6 |
Note: En = enstatite, Fe = ferrosilite, Wo = wollastonite.