|
| E1 | E3 |
| SiO2 (Wt%) | 49.71 | 48.83 |
| TiO2 | 0.01 | 0.11 |
| Al2O3 | 0.44 | 0.45 |
| FeO* | 26.40 | 33.40 |
| MnO | 0.88 | 1.16 |
| MgO | 5.62 | 0.50 |
| CaO | 3.45 | 1.33 |
| Na2O | 8.07 | 9.14 |
| K2O | 0.98 | 1.26 |
| BaO | 0.02 | 0.14 |
| SrO | 0.00 | 0.00 |
| F | 2.64 | 2.57 |
| Cl | 0.00 | 0.04 |
| Total | 98.22 | 98.93 |
| Al iv (a.p.f.u) | 0.07 | 0.03 |
| Alvi | 0.02 | 0.06 |
| Ti | 0.00 | 0.00 |
| Fe3+ | 0.17 | 0.15 |
| Fe2+ | 3.36 | 4.50 |
| Mg | 0.29 | 0.02 |