Table 2 Representative mineral compositions of garnet, clinopyroxene, and plagioclase in metabasites in far-eastern Nepal
Sample | H2608 | H2608 | H2608 | H2608 | H2608 | H2608 | H2608 | H1905 | H1905 | M3103 |
|---|---|---|---|---|---|---|---|---|---|---|
Mineral | Grt | Grt | Grt | Cpx | Cpx | Pl | Pl | Pl | Pl | Pl |
Matrix | Matrix | Inclusion in Grt | Matrix | Matrix | Matrix | |||||
Core | Mantle | Rim | Core | Rim | Core | Rim | ||||
Spot no. | 26 | 19 | 1 | 62 | 4 | 68 | 69 | 91 | 92 | 128 |
SiO2 | 38.99 | 38.52 | 38.73 | 52.64 | 51.60 | 50.20 | 48.89 | 60.74 | 59.80 | 59.77 |
TiO2 | 0.07 | 0.06 | 0.06 | 0.01 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
Al2O3 | 21.60 | 21.49 | 21.24 | 0.48 | 1.73 | 31.77 | 32.54 | 24.42 | 25.55 | 26.18 |
FeOa | 24.94 | 24.65 | 24.94 | 11.09 | 12.36 | 0.00 | 0.14 | 0.01 | 0.06 | 0.05 |
MnO | 1.99 | 1.62 | 1.55 | 0.38 | 0.43 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
MgO | 3.81 | 4.27 | 4.03 | 11.94 | 10.84 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
CaO | 9.87 | 10.01 | 9.93 | 23.55 | 22.61 | 15.00 | 15.51 | 6.16 | 7.44 | 7.60 |
Na2O | 0.01 | 0.01 | 0.01 | 0.14 | 0.29 | 3.14 | 2.70 | 7.91 | 7.54 | 7.04 |
Total | 101.27 | 100.61 | 100.47 | 100.23 | 100.00 | 100.10 | 99.77 | 99.24 | 100.40 | 100.65 |
O basis | 8 | 8 | 8 | 6 | 6 | 8 | 8 | 8 | 8 | 8 |
Si | 3.02 | 2.99 | 3.02 | 1.99 | 1.96 | 2.29 | 2.24 | 2.72 | 2.66 | 2.64 |
Ti | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
Al | 1.97 | 1.97 | 1.95 | 0.02 | 0.08 | 1.71 | 1.76 | 1.29 | 1.34 | 1.37 |
Fe | 1.61 | 1.60 | 1.63 | 0.35 | 0.39 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 |
Mn | 0.13 | 0.11 | 0.10 | 0.01 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
Mg | 0.44 | 0.49 | 0.47 | 0.67 | 0.61 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
Ca | 0.82 | 0.83 | 0.83 | 0.95 | 0.92 | 0.73 | 0.76 | 0.30 | 0.35 | 0.36 |
Na | 0.00 | 0.00 | 0.00 | 0.01 | 0.02 | 0.28 | 0.24 | 0.69 | 0.65 | 0.60 |
Total | 8.00 | 8.00 | 8.00 | 4.01 | 4.01 | 5.00 | 5.00 | 4.98 | 5.00 | 4.98 |