Table T2. Selected analyses of plagioclases, Sites 1109, 1118, and 1117. (Continued on next page.)
Core, section, interval (cm): 180-1109D-41R-3, 72-74 180-1109D-48R-3, 63-79 180-1109D-51R-4, 6-9 180-1109D-51R-4, 58-67 180-1117A-11R-1, 40-44
Matrix: Basalt Coarse-grained diabase Fine-grained diabase Gabbro
Analysis number: 1 2 3 4 5 6 7 8 9 10 11 12 12 13 14 15
Major element oxide (wt%):                                    
SiO2 68.88 52.99
51.29 55.72 54.04
49.79 51.94 53.84 54.94
46.921 47.118 51.81
71.32 67.69 67.92 68.47
Al2O3 20.289 27.536
28.33 28.27 28.58
30.4 29.26 28.34 27.55
33.057 32.97 29.95
17.20 20.91 20.41 20.17
MgO 0.00 0.622
0.25 0.1 0.12
0.22 0.13 0.07 0.1
0.164 0.202 0.17
0.539 0.00 0.00 0.00
FeO 0.148 1.418
0.55 0.87 0.78
0.615 0.991 1.155 0.79
0.458 0.507 0.84
1.67 0.31 0.09 0.02
CaO 0.164 12.712
13.56 11.23 11.14
15.22 13.26 11.79 10.79
17.34 17.369 13.49
0.35 0.65 0.48 0.32
Na2O 11.582 4.487
3.28 4.89 5.01
2.93 4.13 4.76 5.34
1.611 1.762 3.85
8.78 10.99 11.46 11.54
K2O 0.054 0.1
0.03 0.08 0.08
0.26 0.07 0.07 0.05
0.164 0.202 0.08
0.03 0.037 0.106 0.059
Total 101.2 99.94
99.93 100.02 99.56
100.19 99.46 99.53 99.74
101.30 99.85 100.19
99.90 100.59 100.52 100.58
Ab 98.9 38.8
30.39 43.86 46.97
25.51 35.92 42.04 47.08
14.25 15.33 33.9
97.6 96.62 97.18 98.16
An 0.8 60.7
69.43 55.45 52.54
73.25 63.7 57.55 52.61
84.79 83.51 65.7
2.18 3.16 2.23 1.51
Or 0.3 0.6
0.18 0.25 0.49
1.24 0.38 0.41 0.31
0.95 1.16 4.5
0.22 0.21 0.59 0.33

Note: Ab = albite, An = anorthite, Or = orthoclase.