wt% | Ibity | Tsarasaotra | Antsahakely. | |||
IB-16A/ KUR-1 | IB-16A/ KUR-2 | IB-16A/ BI-4 | IB-16A/ SPH-1 | TS-6/MT-2 | ANH-1/BI-3 | |
SiO2 | 30.4 | 30.4 | 30.1 | 29.9 | 29.7 | 29.2 |
TiO2 | 28.9 | 30.8 | 34.6 | 34.8 | 34.9 | 30.1 |
Al2O3 | 1.87 | 2.11 | 2.56 | 2.34 | 2.32 | 6.40 |
FeO | 2.06 | 2.11 | 2.17 | 1.90 | 2.21 | 3.16 |
MnO | 0.26 | 0.28 | 0.19 | 0.11 | 0.29 | 0.13 |
MgO | 0.02 | 0.02 | 0.08 | 0.06 | 0.06 | 0.43 |
CaO | 26.3 | 26.0 | 26.6 | 26.7 | 25.6 | 25.5 |
Total | 89.8 | 91.6 | 96.2 | 95.9 | 95.0 | 94.9 |
Si | 1.10 | 1.08 | 1.02 | 1.02 | 1.02 | 1.00 |
Ti | 0.79 | 0.82 | 0.88 | 0.89 | 0.90 | 0.78 |
Al | 0.08 | 0.09 | 0.10 | 0.09 | 0.09 | 0.26 |
Fe2+ | 0.06 | 0.06 | 0.06 | 0.05 | 0.06 | 0.09 |
Mn | 0.01 | 0.01 | 0.01 | 0.00 | 0.01 | 0.00 |
Mg | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 |
Ca | 1.02 | 0.99 | 0.97 | 0.98 | 0.94 | 0.94 |
Na | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
K | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 |