Leg, hole:
|
118-735B- |
176-735B-
|
118-735B- | 176-735B- | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Core, section: Interval (cm):
|
83R-6
53-59 |
85R-7
0-5 |
87R-7
0-7 |
91R-1
73-76 |
79R-6
105-111 |
45R-2
19-24 |
82R-4
12-20 |
75R-5
27-30 |
71R-2
115-125 |
81R-1
130-132 |
188R-5
13-18 |
168R-2
140-146 |
145R-1
31-41 |
149R-1
56-65 |
Rock type: | Troctolite | Troctolitic gabbro | Olivine Gabbro | |||||||||||
Major element oxide (wt%): | ||||||||||||||
SiO2 | 39.51 | 39.17 | 39.02 | 38.73 | 37.69 | 38.42 | 38.44 | 37.27 | 38.27 | 38.46 | 37.92 | 37.14 | 37.21 | 37.17 |
TiO2 | 0.00 | 0.00 | 0.07 | 0.07 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.00 | 0.09 | 0.00 |
Al2O3 | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.00 | 0.00 | 0.00 | 0.03 | 0.01 |
FeO | 15.56 | 17.40 | 18.96 | 16.12 | 17.82 | 17.42 | 18.42 | 20.38 | 21.95 | 22.78 | 24.08 | 25.97 | 28.07 | 30.26 |
NiO | 0.03 | 0.06 | 0.10 | 0.04 | 0.05 | 0.09 | 0.03 | 0.00 | 0.12 | 0.03 | 0.00 | 0.00 | 0.08 | 0.00 |
MnO | 0.31 | 0.30 | 0.28 | 0.36 | 0.38 | 0.43 | 0.38 | 0.49 | 0.33 | 0.50 | 0.28 | 0.50 | 0.52 | 0.53 |
MgO | 44.68 | 43.17 | 41.87 | 44.76 | 42.26 | 44.00 | 43.08 | 40.97 | 39.20 | 38.83 | 38.26 | 35.47 | 35.02 | 31.67 |
CaO | 0.05 | 0.06 | 0.04 | 0.00 | 0.03 | 0.00 | 0.06 | 0.00 | 0.05 | 0.07 | 0.06 | 0.05 | 0.14 | 0.00 |
Total | 100.14 | 100.16 | 100.36 | 100.07 | 98.23 | 100.36 | 100.41 | 99.11 | 99.94 | 100.67 | 100.66 | 99.13 | 101.16 | 99.64 |
Number of cations based on 4 O: | ||||||||||||||
Si | 0.9941 | 0.9941 | 0.9954 | 0.9798 | 0.9810 | 0.9761 | 0.9799 | 0.9739 | 0.9953 | 0.9965 | 0.9888 | 0.9947 | 0.9860 | 1.0092 |
Ti | 0.0000 | 0.0000 | 0.0013 | 0.0014 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0012 | 0.0000 | 0.0017 | 0.0000 |
Al | 0.0000 | 0.0000 | 0.0004 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0006 | 0.0000 | 0.0000 | 0.0000 | 0.0009 | 0.0003 |
Fe+2 | 0.3274 | 0.3692 | 0.4043 | 0.3409 | 0.3878 | 0.3701 | 0.3926 | 0.4453 | 0.4774 | 0.4935 | 0.5250 | 0.5815 | 0.6221 | 0.6870 |
Ni | 0.0006 | 0.0012 | 0.0021 | 0.0008 | 0.0010 | 0.0018 | 0.0006 | 0.0000 | 0.0025 | 0.0006 | 0.0000 | 0.0000 | 0.0018 | 0.0000 |
Mn | 0.0066 | 0.0064 | 0.0060 | 0.0077 | 0.0084 | 0.0093 | 0.0082 | 0.0108 | 0.0073 | 0.0110 | 0.0061 | 0.0113 | 0.0117 | 0.0122 |
Mg | 1.6759 | 1.6333 | 1.5922 | 1.6881 | 1.6399 | 1.6666 | 1.6372 | 1.5960 | 1.5199 | 1.4999 | 1.4872 | 1.4163 | 1.3837 | 1.2821 |
Ca | 0.0013 | 0.0016 | 0.0012 | 0.0000 | 0.0008 | 0.0000 | 0.0016 | 0.0000 | 0.0014 | 0.0019 | 0.0017 | 0.0014 | 0.0039 | 0.0000 |
Total | 3.0059 | 3.0059 | 3.0026 | 3.0188 | 3.0190 | 3.0239 | 3.0201 | 3.0261 | 3.0038 | 3.0035 | 3.0100 | 3.0053 | 3.0109 | 2.9904 |
Fo | 83.7 | 81.6 | 79.7 | 83.2 | 80.9 | 81.8 | 80.7 | 78.2 | 76.1 | 75.2 | 73.9 | 70.9 | 69.0 | 65.1 |
Fa | 16.3 | 18.4 | 20.3 | 16.8 | 19.1 | 18.2 | 19.3 | 21.8 | 23.9 | 24.8 | 26.1 | 29.1 | 31.0 | 34.9 |