| Basalt | Peridotite | Hydrous basalt
a
|
---|
SiO2
| 47.70(47) | 45.97(47) | 46.10(45) |
TiO2
| 0.62(2) | 0.18(1) | 0.43(1) |
Al2O3
| 19.05(21) | 14.76(16) | approximately 14.8a
|
Cr2O3
| 0.12(0.3) | 0.47(1) | 0.10(0.2) |
FeO* | 7.82(8) | 7.54(7) | 7.38(7) |
MnO | 0.15(0.3) | 0.13(0.3) | 0.14(0.3) |
MgO | 10.49(3) | 37.79(11) | 7.32(2)b
|
CaO | 11.75(35) | 3.21(10) | 13.09(39) |
Na2O | 2.35(5) | 0.33(1) | 2.27(7) |
K2O | 0.08(0.2) | 0.03(0.1) | 0.60(2) |
P2O5
| 0.01(0.02) | 0.03(0.1) | ND |
H2O | N.D. | N.D. | approximately 7.8a
|
Total | 100.13 | 99.99 | 100.00 |
- Analyses were done by ICP-AES on basalt and peridotite powders. Units in parentheses represent one standard deviation, determined from the ICP-AES standard BHVO-1.
-
aHydrous basalt composition was analyzed before the addition of Al(OH)3.. Al(OH)3 was then added to complete Al2O3 contents, so Al2O3 and H2O are calculated compositions likely associated with a larger error (since reported contents are calculated from weighted Al(OH)3).
-
bMgO of basalt is low to allow the addition of MgF2 and MgCl2.
-
FeO* total Fe as FeO.
-
N.D. not determined.