Leg, hole:
|
118-735B- | 176-735B- |
118-735B-
|
176-735B-
|
||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Core, section: Interval (cm):
|
87R-6
106-114 |
87R-7
0-7 |
87R-7
0-7 |
87R-7
0-7 |
79R-6
105-111 |
79R-6
105-111 |
83R-6
53-59 |
85R-7
0-5 |
91R-5
81-86 |
91R-3
67-72 |
91R-3
67-72 |
91R-5
81-86 |
144R-1
113-122 |
141R-1
50-55 |
87R-6
31-41 |
205R-4
40-45 |
Rock type: | Troctolite | Troctolitic gabbro | Olivine gabbro | |||||||||||||
Major element oxide (wt%): | ||||||||||||||||
SiO2 | 51.71 | 51.63 | 51.90 | 55.67 | 48.22 | 49.39 | 49.06 | 51.78 | 49.37 | 50.00 | 51.24 | 52.04 | 52.68 | 53.74 | 53.14 | 53.78 |
TiO2 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.09 | 0.03 | 0.05 | 0.00 | 0.04 | 0.00 |
Al2O3 | 30.95 | 30.46 | 29.71 | 27.60 | 32.88 | 32.40 | 32.38 | 30.86 | 32.44 | 31.85 | 31.02 | 30.96 | 29.63 | 28.85 | 29.32 | 28.84 |
Fe2O3 | 0.12 | 0.18 | 0.22 | 0.14 | 0.07 | 0.07 | 0.06 | 0.21 | 0.07 | 0.13 | 0.07 | 0.00 | 0.32 | 0.22 | 0.24 | 0.38 |
CaO | 13.85 | 13.24 | 12.41 | 10.06 | 16.19 | 15.44 | 15.31 | 13.87 | 15.34 | 15.00 | 14.02 | 13.10 | 12.83 | 12.22 | 11.86 | 11.92 |
Na2O | 3.72 | 4.05 | 4.19 | 6.08 | 2.51 | 2.82 | 3.26 | 3.15 | 2.96 | 3.11 | 3.78 | 4.17 | 4.59 | 4.76 | 4.62 | 5.34 |
K2O | 0.01 | 0.05 | 0.03 | 0.03 | 0.00 | 0.00 | 0.00 | 0.12 | 0.00 | 0.05 | 0.01 | 0.00 | 0.04 | 0.06 | 0.03 | 0.04 |
BaO | 0.00 | 0.00 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.12 | 0.00 | 0.15 | 0.00 | 0.00 | 0.08 |
Total | 100.36 | 99.61 | 98.52 | 99.58 | 99.87 | 100.12 | 100.07 | 99.99 | 100.19 | 100.28 | 100.35 | 100.29 | 100.29 | 99.85 | 99.25 | 100.38 |
Number of cations based on 8 O: | ||||||||||||||||
Si | 2.3409 | 2.3542 | 2.3866 | 2.5165 | 2.2117 | 2.2526 | 2.2429 | 2.3491 | 2.2507 | 2.2771 | 2.3256 | 2.3530 | 2.3883 | 2.4361 | 2.4203 | 2.4310 |
Ti | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0014 | 0.0031 | 0.0011 | 0.0016 | 0.0000 | 0.0014 | 0.0000 |
AlIV | 1.6513 | 1.6369 | 1.6102 | 1.4704 | 1.7774 | 1.7415 | 1.7446 | 1.6500 | 1.7431 | 1.7095 | 1.6592 | 1.6470 | 1.5833 | 1.5416 | 1.5739 | 1.5365 |
AlVI | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0030 | 0.0000 | 0.0000 | 0.0000 | 0.0000 |
Fe+3 | 0.0041 | 0.0062 | 0.0077 | 0.0048 | 0.0024 | 0.0024 | 0.0021 | 0.0072 | 0.0026 | 0.0045 | 0.0024 | 0.0000 | 0.0110 | 0.0075 | 0.0082 | 0.0130 |
Ca | 0.6717 | 0.6468 | 0.6113 | 0.4872 | 0.7955 | 0.7544 | 0.7499 | 0.6741 | 0.7493 | 0.7318 | 0.6817 | 0.6344 | 0.6233 | 0.5933 | 0.5787 | 0.5773 |
Na | 0.3265 | 0.3580 | 0.3739 | 0.5328 | 0.2232 | 0.2493 | 0.2889 | 0.2771 | 0.2616 | 0.2746 | 0.3326 | 0.3651 | 0.4036 | 0.4185 | 0.4079 | 0.4678 |
K | 0.0006 | 0.0029 | 0.0018 | 0.0017 | 0.0000 | 0.0000 | 0.0000 | 0.0069 | 0.0000 | 0.0029 | 0.0006 | 0.0000 | 0.0024 | 0.0035 | 0.0017 | 0.0022 |
Ba | 0.0000 | 0.0000 | 0.0009 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0018 | 0.0021 | 0.0000 | 0.0026 | 0.0000 | 0.0000 | 0.0014 |
Total ions | 4.9951 | 5.0049 | 4.9924 | 5.0133 | 5.0102 | 5.0003 | 5.0284 | 4.9644 | 5.0074 | 5.0035 | 5.0073 | 5.0036 | 5.0161 | 5.0005 | 4.9922 | 5.0293 |
An | 67.3 | 64.2 | 61.9 | 47.7 | 78.1 | 75.2 | 72.2 | 70.4 | 74.1 | 72.5 | 67.2 | 63.5 | 60.6 | 58.4 | 58.6 | 55.1 |
Ab | 32.7 | 35.5 | 37.9 | 52.1 | 21.9 | 24.8 | 27.8 | 28.9 | 25.9 | 27.2 | 32.8 | 36.5 | 39.2 | 41.2 | 41.3 | 44.7 |
Or | 0.1 | 0.3 | 0.2 | 0.2 | 0.0 | 0.0 | 0.0 | 0.7 | 0.0 | 0.3 | 0.1 | 0.0 | 0.2 | 0.3 | 0.2 | 0.2 |
Note: An = anorthite, Ab = albite, Or = orthoclase.