| I | II | III | IV | V | VI | VII | VIII |
SiO2 | 60.86 | 63.90 | 68.36 | 60.75 | 60.08 | 58.04 | 67.10 | 69.90 |
Al2O3 | 13.01 | 13.19 | 14.08 | 14.49 | 12.38 | 17.30 | 14.10 | 15.10 |
TiO2 | 0.77 | 0.56 | 0.73 | 0.36 | 0.65 | 1.65 | 0.80 | 0.41 |
Fe2O3 | 1.49 | 2.10 | 1.22 | 1.75 | 3.28 | 1.20 | 4.36 | 2.36 |
FeO | 5.70 | 5.97 | 4.51 | 9.98 | 4.20 | 8.04 | 3.60 | 1.30 |
MnO | 0.35 | 0.39 | 0.11 | 0.10 | 0.18 | 2.27 | 0.05 | 0.02 |
MgO | 3.90 | 2.77 | 0.85 | 3.26 | 1.95 | 5.90 | 2.31 | 1.09 |
CaO | 10.30 | 5.80 | 2.37 | 5.10 | 9.43 | 1.40 | 2.82 | 3.20 |
Na2O | 1.47 | 1.72 | 1.52 | 2.62 | 2.59 | 0.88 | 3.91 | 4.79 |
K2O | 1.66 | 3.03 | 5.93 | 1.20 | 3.06 | 3.24 | 2.23 | 1.49 |
P2O5 | 0.26 | 0.28 | 0.24 | 0.05 | - | 0.75 | 0.02 | 0.08 |
H2O | 0.55 | 0.46 | 0.44 | 0.51 | 1.80 | 0.15 | 0.47 | 0.16 |