| Weathered pegmatites in Gatumba | Fresh pegmatite in Gitarama | Biotite-muscovite granite in Gitarama | Amphibolite in Gitarama | ||||||||||
Sample | Gape01 | Gape02 | Gape03 | Gape04 | Gape05 | Gape06 | Gipe07 | Gipe08 | Gipe09 | RG01 | RG02 | RG03 | RGA01 | RGA02 |
SiO2 | 65.3 | 59.9 | 74.0 | 80.5 | 63.6 | 59.5 | 73.9 | 74.7 | 75.0 | 71.4 | 72.4 | 71.5 | 46.1 | 46.9 |
Al2O3 | 13.75 | 14.65 | 12 | 11.85 | 18.80 | 14.65 | 12.75 | 13.0 | 12.95 | 14.05 | 13.80 | 13.70 | 13.05 | 12.95 |
Fe2O3 | 1.47 | 0.47 | 5.56 | 1.33 | 0.48 | 0.50 | 1.13 | 1.10 | 1.14 | 3.46 | 3.35 | 3.56 | 11.75 | 12.10 |
MnO | 0.02 | 0.12 | 0.20 | 0.01 | 0.01 | 0.12 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.20 | 0.21 |
CaO | 0.19 | 8.43 | 0.75 | 0.30 | 0.25 | 8.84 | 0.29 | 0.30 | 0.28 | 2.13 | 2.04 | 2.01 | 11.30 | 11.60 |
K2O | 0.96 | 1.22 | 1.44 | 1.75 | 10.25 | 1.24 | 7.54 | 7.73 | 7.71 | 4.49 | 4.27 | 4.28 | 0.40 | 0.38 |
Na2O | 0.25 | 7.18 | 2.01 | 4.55 | 2.18 | 7.15 | 2.08 | 2.12 | 2.09 | 3.04 | 3.04 | 3.00 | 1.33 | 1.31 |
P2O5 | 11.60 | 6.43 | 0.59 | 0.23 | 0.53 | 6.82 | 0.16 | 0.15 | 0.13 | 0.17 | 0.19 | 0.17 | 0.11 | 0.06 |
Cr2O3 | 0.004 | <0.002 | 0.013 | <0.002 | <0.002 | <0.002 | <0.002 | <0.002 | <0.002 | 0.010 | 0.004 | 0.004 | 0.038 | 0.041 |
TiO2 | 0.04 | 0.01 | 0.01 | 0.02 | <0.01 | 0.01 | 0.02 | 0.02 | 0.02 | 0.37 | 0.35 | 0.38 | 0.67 | 0.67 |
MgO | 0.10 | 0.03 | 0.31 | 0.07 | 0.02 | 0.04 | 0.06 | 0.06 | 0.06 | 0.79 | 0.76 | 0.78 | 8.47 | 8.78 |
SrO | <0.01 | 0.01 | <0.01 | <0.01 | <0.01 | 0.01 | <0.01 | <0.01 | <0.01 | 0.01 | 0.01 | 0.02 | <0.01 | <0.01 |
BaO | 0.03 | <0.01 | 0.01 | <0.01 | 0.01 | <0.01 | 0.10 | 0.10 | 0.10 | 0.13 | 0.12 | 0.12 | 0.02 | 0.02 |
LOI | 5.05 | 0.95 | 5.07 | 0.66 | 2.10 | 0.98 | 1.04 | 1.08 | 1.10 | 0.70 | 0.73 | 0.67 | 1.37 | 1.37 |
Total | 98.76 | 99.40 | 91.16 | 101.27 | 98.23 | 99.86 | 99.11 | 100.40 | 100.62 | 100.79 | 101.10 | 100.23 | 94.81 | 96.39 |