Spot No. | 1 | 2 | 3 | 4 | 5 | 6 |
Major oxides wt% recalculated to 100% | ||||||
SiO2 | 48.16 | 48.68 | 50.42 | 47.54 | 51.01 | 49.92 |
TiO2 | 0.72 | 0.54 | 0.29 | 0.59 | 0.24 | 0.62 |
Al2O3 | 1.06 | 0.78 | 1.58 | 1.79 | 0.94 | 0.92 |
FeO* | 27.64 | 22.53 | 23.06 | 28.18 | 25.93 | 23.10 |
MnO | 0.12 | 0.59 | 0.52 | 0.81 | 0.24 | 0.64 |
MgO | 3.53 | 16.18 | 14.58 | 11.24 | 12.11 | 9.86 |
CaO | 18.50 | 9.90 | 9.45 | 9.27 | 9.20 | 14.4 |
Na2O | 0.23 | 0.65 | 0.07 | 0.23 | 0.11 | 0.44 |
K2O | 0.04 | 0.15 | 0.03 | 0.05 | 0.04 | 0.1 |
Total | 100 | 100 | 100 | 100 | 100 | 100 |
Cations on basis of 6 oxygens | ||||||
Si | 1.841 | 1.827 | 1.929 | 1.946 | 1.968 | 1.935 |
Ti | 0.022 | 0.026 | 0.009 | 0.027 | 0.009 | 0.025 |
Al | 0.051 | 0.034 | 0.067 | 0.083 | 0.029 | 0.465 |
Al | 0.051 | 0.039 | 0.009 | 0.055 | 0.029 | 0.015 |
Al | 0.00 | 0.00 | 0.00 | 0.028 | 0.00 | 0.00 |
Fe | 0.915 | 0.615 | 0.713 | 0.888 | 0.030 | 0.602 |
Mn | 0.019 | 0.019 | 0.016 | 0.027 | 0.010 | 0.018 |
Mg | 0.211 | 0.925 | 1.21 | 0.651 | 0.832 | 0.733 |
Ca | 0.826 | 0.417 | 0.095 | 0.362 | 0.858 | 0.526 |
Na | 0.017 | 0.048 | 0.004 | 0.018 | 0.035 | 0.024 |
K | 0.002 | 0.080 | 0.00 | 0.003 | 0.002 | 0.021 |