Rocks | Ibity | Tsarasaotra | Ibity | Tsarasaotra | Antsahakely | |||||||||||
Granite | Monzonitic | Granite dyke | Granite | Monzonitic | Granite dyke | Granite | ||||||||||
Spl | IB-8 | IB-8 | IB-8 | IB-16 | TS-6 | TS-6 | TS-2 | TS-2 | IB-9A | IB-14 | TS-1 | TS-6 | TS-2 | TS-4 | ANH-1 | ANH-1 |
Point | PL-3 | PL-1C | PL-3 | PL-1A | PL-2 | PL-2A | PL-1 | PL-2 | KF-3 | KF-1 | KF-3 | KF-1 | KF-1 | KF-2 | KF-4 | KF-5 |
SiO2 | 64.1 | 67.3 | 64.7 | 69.1 | 68.3 | 65.7 | 65.0 | 63.9 | 65.9 | 62.6 | 64.4 | 63.6 | 45.6 | 64.4 | 64.6 | 61.3 |
TiO2 | 0.01 | - | 0.01 | 0.00 | 0.02 | 0.00 | 0.02 | 0.03 | 0.03 | 0.10 | - | 0.01 | ||||
Al2O3 | 23.1 | 25.4 | 23.3 | 22.2 | 21.9 | 23.3 | 22.8 | 24.1 | 18.5 | 19.3 | 19.9 | 19.3 | 35.3 | 19.7 | 19.0 | 19.9 |
FeO | 0.05 | 0.04 | 0.02 | 0.03 | 0.09 | 0.08 | 0.01 | 0.07 | - | 0.03 | 0.04 | 0.03 | 3.33 | 0.02 | - | 0.04 |
MnO | - | - | - | - | 0.00 | - | 0.01 | - | - | |||||||
MgO | - | 0.00 | - | 0.02 | - | 0.00 | - | - | 0.00 | 0.01 | - | 0.43 | - | |||
CaO | 1.52 | 3.02 | 2.04 | 0.24 | 0.73 | 1.86 | 2.58 | 4.28 | 0.01 | - | 0.59 | 0.04 | 0.04 | 0.01 | ||
Na2O | 10.25 | 5.19 | 9.48 | 9.58 | 10.3 | 9.95 | 9.70 | 8.62 | 0.88 | 0.28 | 1.61 | 0.58 | 0.17 | 1.26 | 0.48 | 0.34 |
K2O | 0.19 | 0.11 | 0.17 | 0.07 | 0.02 | 0.13 | 0.13 | 0.35 | 15.9 | 18.3 | 14.5 | 16.5 | 11.4 | 16.1 | 17.1 | 17.5 |
Total | 99.1 | 101 | 100 | 101 | 101 | 101 | 100 | 101 | 101 | 101 | 101 | 100 | 96.3 | 102 | 101 | 99.0 |
Si | 2.84 | 2.87 | 2.84 | 2.95 | 2.93 | 2.85 | 2.85 | 2.78 | 3.00 | 2.92 | 2.93 | 2.95 | 2.22 | 2.94 | 2.97 | 2.90 |
Ti | - | 0.00 | - | - | 0.00 | 0.00 | - | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | - | - | 0.00 |
Al | 1.20 | 1.27 | 1.21 | 1.12 | 1.11 | 1.19 | 1.18 | 1.24 | 1.00 | 1.06 | 1.07 | 1.05 | 2.02 | 1.06 | 1.03 | 1.11 |
Fe | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | - | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | - | 0.00 |
Mn | - | - | - | - | - | - | - | 0.00 | - | - | 0.00 | - | - | - | - | - |
Mg | - | - | 0.00 | - | 0.00 | - | 0.00 | - | - | 0.00 | 0.00 | - | 0.03 | - | - | - |
Ca | 0.07 | 0.14 | 0.10 | 0.01 | 0.03 | 0.09 | 0.12 | 0.20 | 0.00 | - | 0.03 | 0.00 | - | 0.00 | 0.00 | - |
Na | 0.88 | 0.43 | 0.81 | 0.79 | 0.86 | 0.84 | 0.82 | 0.73 | 0.08 | 0.03 | 0.14 | 0.05 | 0.02 | 0.11 | 0.04 | 0.03 |
K | 0.01 | 0.01 | 0.01 | 0.00 | 0.00 | 0.01 | 0.01 | 0.02 | 0.92 | 1.09 | 0.84 | 0.97 | 0.71 | 0.94 | 1.00 | 1.05 |
An | 7.50 | 24.1 | 10.5 | 1.38 | 3.8 | 9.3 | 12.7 | 21.1 | 0.04 | - | 2.8 | 0.2 | - | 0.2 | 0.04 | - |
Ab | 91.4 | 74.8 | 88.4 | 98.2 | 96.1 | 89.9 | 86.5 | 76.9 | 7.77 | 2.29 | 14.0 | 5.1 | 2.2 | 10.6 | 4.10 | 2.85 |
Or | 1.09 | 1.07 | 1.06 | 0.45 | 0.14 | 0.80 | 0.73 | 2.03 | 92.2 | 97.7 | 83.2 | 94.8 | 97.8 | 89.2 | 95.9 | 97.2 |