Table T5. Representative olivine compositions for the major rock types, Hole 735B. (Continued on next two pages.)
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