Table T5. Representative microprobe analyses of diopside from veins, Hole 735B.
 
Core, section, interval (cm):
35R-3,
74-78
43R-4,
129-133
43R-4,
129-133
44R-1,
35-47
63R-1,
106-107
63R-6,
98-106
63R-6,
98-106
64R-4,
66-70
66R-3,
128-132
66R-3,
128-132
68R-2,
68-75
70R-1,
39-49
71R-2,
115-125
84R-1,
88-98
87R-6,
31-41
92R-2,
49-53
92R-2,
49-53
163R-6,
15-20
Number of analyses:
2
1
3
4
1
3
1
1
2
2
2
2
1
3
2
1
1
2
Major element oxide (wt%):
SiO2 52.58 51.42 53.43 52.88 53.35 53.48 52.94 53.90 53.35 53.48 53.73 53.01 53.22 52.15 52.89 53.27 53.36 52.93
TiO2 0.05 0.18 0.03 0.01 0.03 0.03 0.00 0.00 0.00 0.03 0.02 0.03 0.02 0.05 0.17 0.00 0.00 0.06
Al2O3 0.27 1.79 0.46 0.39 0.54 0.27 0.11 0.28 0.42 0.75 0.34 0.38 0.23 0.58 0.95 1.19 0.04 0.36
FeO 8.20 11.29 6.44 7.36 5.67 6.68 10.01 5.00 6.01 7.43 6.75 8.45 6.50 9.54 6.26 4.37 8.09 8.52
Cr2O3 0.00 0.00 0.00 0.02 0.12 0.01 0.00 0.03 0.01 0.04 0.01 0.03 0.02 0.01 0.07 0.01 0.04 0.10
MnO 0.22 0.08 0.09 0.12 0.03 0.13 0.17 0.04 0.07 0.10 0.16 0.16 0.06 0.15 0.16 0.15 0.01 0.62
MgO 13.78 10.83 14.31 14.16 14.73 14.30 12.13 15.72 15.07 13.38 14.10 13.06 14.36 12.71 15.91 15.98 13.87 14.18
CaO 22.27 23.26 24.02 23.54 24.62 24.46 23.68 24.60 23.93 23.72 23.80 23.42 24.45 23.87 22.61 24.47 24.05 22.29
Na2O 1.96 0.37 0.45 0.66 0.20 0.30 0.29 0.23 0.34 0.47 0.35 0.55 0.32 0.28 0.27 0.33 0.15 0.69
Total: 99.35 99.22 99.23 99.14 99.28 99.66 99.33 99.80 99.17 99.39 99.24 99.10 99.18 99.34 99.27 99.78 99.60 99.75
Number of ions based on 6 O:
Si 1.9831 1.9626 1.9950 1.9863 1.9846 1.9929 2.0063 1.9890 1.9889 1.9988 2.0057 1.9987 1.9917 1.9764 1.9656 1.9633 1.9980 1.9826
Ti 0.0003 0.0011 0.0002 0.0001 0.0002 0.0002 0.0000 0.0000 0.0000 0.0001 0.0001 0.0002 0.0001 0.0003 0.0010 0.0000 0.0000 0.0004
AlIV 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
AlVI 0.0120 0.0804 0.0201 0.0171 0.0237 0.0118 0.0049 0.0122 0.0182 0.0330 0.0148 0.0167 0.0101 0.0257 0.0416 0.0517 0.0016 0.0159
Al ions 0.0120 0.0804 0.0201 0.0171 0.0237 0.0118 0.0049 0.0122 0.0182 0.0330 0.0148 0.0167 0.0101 0.0257 0.0416 0.0517 0.0016 0.0159
Fe+2 0.2585 0.3604 0.2010 0.2313 0.1762 0.2082 0.3172 0.1542 0.1873 0.2322 0.2107 0.2666 0.2035 0.3022 0.1945 0.1347 0.2532 0.2670
Cr 0.0003 0.0000 0.0000 0.0010 0.0075 0.0008 0.0000 0.0019 0.0003 0.0025 0.0006 0.0021 0.0013 0.0009 0.0044 0.0003 0.0027 0.0064
Mn 0.0071 0.0027 0.0027 0.0039 0.0009 0.0042 0.0055 0.0013 0.0021 0.0032 0.0051 0.0051 0.0019 0.0049 0.0049 0.0048 0.0002 0.0196
Mg 0.7751 0.6161 0.7969 0.7929 0.8167 0.7941 0.6853 0.8648 0.8372 0.7456 0.7844 0.7344 0.8012 0.7182 0.8812 0.8779 0.7741 0.7918
Ca 0.8998 0.9510 0.9609 0.9475 0.9812 0.9764 0.9614 0.9725 0.9555 0.9499 0.9517 0.9461 0.9803 0.9692 0.9002 0.9663 0.9646 0.8946
Na 0.4233 0.0786 0.0974 0.1412 0.0421 0.0645 0.0643 0.0488 0.0730 0.1009 0.0764 0.1212 0.0691 0.0596 0.0564 0.0684 0.0325 0.1475
Total: 3.9362 3.9742 3.9768 3.9801 3.9910 3.9886 3.9806 3.9958 3.9895 3.9654 3.9730 3.9699 3.9900 3.9978 3.9934 3.9989 3.9944 3.9782
En 40.1 32.0 40.7 40.2 41.4 40.1 34.9 43.4 42.3 38.7 40.3 37.7 40.4 36.1 44.6 44.4 38.9 40.5
Fe 13.4 18.7 10.3 11.7 8.9 10.5 16.2 7.7 9.5 12.0 10.8 13.7 10.3 15.2 9.8 6.8 12.7 13.7
Wo 46.5 49.3 49.1 48.1 49.7 49.3 49.0 48.8 48.3 49.3 48.9 48.6 49.4 48.7 45.6 48.8 48.4 45.8
Mg# 75.0 63.1 79.9 77.5 82.3 79.2 68.4 84.9 81.7 76.3 78.8 73.4 79.7 70.4 81.9 86.7 75.4 74.8