Table T7. Representative clinopyroxene 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
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.