Table 4. Inferred melt compositions.
| Leg, hole,
core, section, interval (cm) |
Unit | Description | Whole-rock Mg# |
Cr-spinel
cores inferred melt Mg# |
|---|---|---|---|---|
38-338-43-1, 102-107 |
1 |
Plagioclase-phyric basalt |
0.56-0.64 |
|
38-338-43-3, 117-121 |
1 |
Plagioclase-phyric basalt |
0.651 |
0.58-0.62 |
38-338-45-1, 62-65 |
2 |
Plagioclase-olivine-clinopyroxene phyric basalt |
0.619 |
0.55-0.63 |
Upper series |
||||
152-917A-9R-1, 5-10 |
7 |
Aphyric olivine basalt |
0.646 |
0.50-0.59 |
152-917A-11R-4, 45-50 |
13 |
Aphyric olivine basalt |
0.660 |
0.58-0.59 |
152-917A-16R-4, 39-44 |
21 |
Picrite |
0.804 |
0.60-0.70 |
152-917A-18R-3, 102-107 |
25 |
Picrite |
0.738 |
0.55-0.61 |
152-917A-19R-4, 38-43 |
31A |
Olivine-phyric basalt |
0.685 |
0.53-0.65 |
152-917A-20R-1, 9-14 |
31B |
Picrite |
0.750 |
0.61-0.70 |
Lower series |
||||
152-917A-55R-4, 22-27 |
60 |
Olivine-plagioclase-pyroxene-phyric basalt |
0.626 |
0.46-0.55 |
152-917A-64R-1, 75-80 |
68 |
Olivine-plagioclase-phyric basalt |
0.611 |
0.57-0.60 |
152-917A-92R-4, 57-64 |
87 |
Aphyric olivine basalt |
0.649 |
0.43-0.45 |
152-917A-101R-4, 35-40 |
92 |
Olivine-phyric basalt |
0.653 |
0.52-0.62 |