| E1 | E1 | E1 |
SiO2 (wt%) | 47.19 | 47.67 | 47.15 |
TiO2 | 0.00 | 0.00 | 0.02 |
Al2O3 | 0.08 | 0.15 | 0.18 |
FeO* | 29.34 | 29.66 | 28.88 |
MnO | 1.45 | 1.49 | 1.44 |
MgO | 0.78 | 0.87 | 0.87 |
CaO | 18.64 | 18.12 | 18.82 |
Na2O | 1.23 | 1.10 | 0.93 |
Total | 98.73 | 99.07 | 98.27 |
Wo (%) | 46.02 | 43.77 | 45.35 |
En | 3.04 | 3.26 | 3.26 |
Fs | 50.93 | 52.97 | 51.39 |
Q | 1.706 | 1.742 | 1.765 |
J | 0.198 | 0.177 | 0.150 |