| Amp-3 | Amp-5 | Amp-6 | Amp-7 | Amp-14 | Amp-15 | Amp-16 | Amp-17 | Amp-19 | Amp-22 | Amp-25 | Amp-26 |
SiO2 | 39.47 | 40.34 | 41.14 | 52.66 | 49.36 | 52.04 | 50.98 | 41.74 | 38.84 | 52.52 | 51.08 | 50.63 |
TiO2 | 0.35 | 0.26 | 0.17 | 0.10 | 0.17 | 0.13 | 0.15 | 0.38 | 0.09 | 0.06 | 0.09 | 0.10 |
Al2O3 | 16.10 | 14.07 | 14.39 | 3.24 | 6.90 | 4.61 | 4.63 | 14.12 | 18.65 | 3.07 | 3.42 | 3.23 |
Cr2O3 | 0.02 | 0.02 | 0.01 | 0.01 | 0.03 | 0.02 | 0.02 | 0.02 | 0.00 | 0.02 | 0.03 | 0.04 |
FeO | 20.46 | 21.05 | 19.87 | 11.28 | 11.86 | 10.85 | 10.86 | 16.09 | 20.07 | 13.44 | 14.50 | 15.08 |
MnO | 0.11 | 0.10 | 0.10 | 0.09 | 0.08 | 0.11 | 0.02 | 0.05 | 0.09 | 0.23 | 0.16 | 0.23 |
MgO | 6.17 | 6.59 | 7.30 | 16.36 | 14.38 | 16.10 | 15.28 | 9.84 | 5.02 | 14.88 | 13.63 | 13.25 |
CaO | 9.01 | 8.70 | 10.16 | 12.68 | 11.87 | 12.31 | 13.60 | 11.12 | 9.47 | 12.37 | 12.55 | 12.90 |
Na2O | 3.82 | 3.75 | 2.94 | 0.77 | 1.60 | 0.87 | 1.08 | 2.50 | 3.34 | 0.49 | 0.49 | 0.50 |
K2O | 0.88 | 0.77 | 0.65 | 0.12 | 0.38 | 0.22 | 0.25 | 1.33 | 0.98 | 0.12 | 0.16 | 0.15 |
Total | 96.39 | 95.65 | 96.73 | 97.31 | 96.63 | 97.26 | 96.87 | 97.19 | 96.55 | 97.2 | 96.11 | 96.11 |
Si | 6.18 | 6.27 | 6.37 | 7.69 | 7.25 | 7.47 | 7.45 | 6.34 | 6.04 | 7.71 | 7.52 | 7.65 |
Al | 1.83 | 1.74 | 1.63 | 0.31 | 0.75 | 0.53 | 0.56 | 1.66 | 1.96 | 0.29 | 0.48 | 0.36 |
Fe3+ | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
Ti | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
Fe2+ | 2.39 | 2.35 | 2.35 | 1.33 | 1.49 | 1.15 | 1.31 | 1.84 | 2.22 | 1.38 | 1.48 | 1.88 |
Ca | 1.53 | 1.51 | 1.67 | 2.02 | 1.90 | 0.00 | 2.19 | 1.78 | 1.49 | 1.87 | 2.05 | 2.09 |
Na | 1.23 | 1.22 | 0.90 | 0.28 | 0.57 | 0.28 | 0.28 | 0.88 | 0.90 | 0.00 | 0.00 | 0.29 |
K | 0.20 | 0.20 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.19 | 0.20 | 0.00 | 0.00 | 0.00 |