W17 | W32 | W33 | W34 | W35 | W36 | W37 | W38 | W39 | W40 | W41 | W42 | W43 | |
SiO2 | 43.48 | 46.84 | 45.60 | 45.58 | 46.74 | 48.89 | 49.37 | 46.53 | 48.82 | 49.37 | 48.44 | 48.69 | 47.18 |
TiO2 | 0.36 | 0.02 | 0.05 | 0.03 | 0.02 | 0.04 | 0.02 | 0.03 | 0.04 | 0.03 | 0.03 | 0.03 | 0.03 |
Al2O3 | 6.59 | 1.22 | 1.81 | 1.06 | 0.92 | 1.92 | 1.06 | 1.49 | 1.04 | 1.08 | 0.98 | 1.06 | 1.11 |
Fe2O3 | 46.48 | 6.47 | 7.65 | 9.02 | 7.40 | 8.35 | 6.16 | 7.43 | 7.33 | 6.45 | 6.61 | 6.80 | 6.86 |
FeO | 1.01 | 1.01 | 1.01 | 1.03 | 1.02 | 1.02 | 0.99 | 1.03 | 1.02 | 1.00 | 0.99 | 1.01 | 1.01 |
MnO | 0.20 | 0.10 | 0.10 | 0.07 | 0.08 | 0.10 | 0.11 | 0.12 | 0.10 | 0.09 | 0.08 | 0.10 | 0.07 |
MgO | 0.37 | 44.17 | 43.64 | 43.07 | 43.68 | 39.51 | 42.14 | 43.19 | 41.50 | 41.83 | 42.71 | 42.14 | 43.55 |
CaO | 0.09 | 0.04 | 0.03 | 0.02 | 0.02 | 0.06 | 0.03 | 0.05 | 0.04 | 0.04 | 0.05 | 0.05 | 0.06 |
Na2O | 0.03 | 0.01 | 0.01 | 0.01 | |||||||||
K2O | 1.15 | ||||||||||||
P2O5 | 0.10 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | |||||||
100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
FeOT | 47.49 | 7.48 | 8.66 | 10.05 | 8.42 | 9.37 | 7.15 | 8.45 | 8.35 | 7.45 | 7.60 | 7.81 | 7.87 |
FeOT/MgO | 127.087 | 0.169 | 0.198 | 0.233 | 0.193 | 0.237 | 0.170 | 0.196 | 0.201 | 0.178 | 0.178 | 0.185 | 0.181 |