|
Hole:
|
187-1155A-
|
187-1155B-
|
187-1156A-
|
187-1161A-
|
187-1160B-
|
||
|---|---|---|---|---|---|---|---|
|
Core, section:
|
5R-1
|
4R-2
|
2R-3
|
3R-2
|
3R-1
|
4R-1
|
9R-1
|
|
Interval (cm):
|
20-23
|
22-26
|
113-136
|
19-22
|
68-69
|
59-62
|
125-129
|
|
MORB province:
|
Indian
|
Indian
|
Indian
|
Indian
|
Indian
|
Pacific
|
Pacific
|
|
Step:
|
4
|
0
|
4
|
1
|
4
|
4
|
7
|
| Equilibrated melt (wt%): |
|
|
|
|
|
||
| SiO2 | 50.97 | 50.30 | 51.01 | 50.66 | 51.60 | 49.66 | 49.49 |
| TiO2 | 1.61 | 1.06 | 1.35 | 1.28 | 1.40 | 1.16 | 0.98 |
| Al2O3 | 14.14 | 17.44 | 14.95 | 16.53 | 14.96 | 14.99 | 14.90 |
| FeO* | 9.98 | 7.86 | 8.79 | 8.08 | 8.68 | 9.09 | 8.76 |
| MnO | 0.17 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.12 |
| MgO | 9.42 | 8.20 | 9.79 | 8.47 | 9.55 | 10.53 | 11.70 |
| CaO | 10.27 | 11.94 | 11.13 | 11.76 | 10.60 | 11.65 | 11.58 |
| Na2O | 2.99 | 2.69 | 2.57 | 2.72 | 2.80 | 2.61 | 2.36 |
| K2O | 0.24 | 0.25 | 0.11 | 0.23 | 0.11 | 0.07 | 0.04 |
| P2O5 | 0.21 | 0.11 | 0.13 | 0.13 | 0.16 | 0.09 | 0.07 |
| Ni (ppm) | 168.0 | 156.0 | 188.6 | 156.9 | 190.0 | 209.7 | 234.9 |
| Mg# | 0.63 | 0.65 | 0.66 | 0.65 | 0.66 | 0.67 | 0.70 |
| Equilibrated Ol composition: |
|
|
|
|
|
||
| NiO (wt%) | 0.296 | 0.321 | 0.328 | 0.313 | 0.339 | 0.342 | 0.351 |
| Mg# | 86.8 | 87.9 | 88.5 | 87.9 | 88.4 | 88.9 | 90.2 |
| Norm ratio: |
|
|
|
|
|
|
|
| Ol | 51.3 | 50.8 | 46.9 | 48.1 | 46.5 | 55.5 | 56.5 |
| PI | 34.9 | 39.4 | 32.4 | 39.1 | 30.4 | 40.2 | 35.4 |
| Silica | 13.9 | 9.8 | 20.7 | 12.8 | 23.1 | 4.3 | 8.1 |
Note: Ol = olivine, Pl = plagioclase.