SiO2 | 36.65 | 36.42 | 35.82 | 35.79 | 37.68 | 38.06 | 37.54 | 37.34 | 37.29 |
TiO2 | 5.05 | 4.80 | 5.18 | 5.07 | 5.54 | 5.27 | 5.15 | 5.80 | 5.88 |
Al2O3 | 14.87 | 13.94 | 13.99 | 14.03 | 14.18 | 14.39 | 14.36 | 14.23 | 13.87 |
Cr2O3 | 0.04 | 0.04 | 0.05 | 0.07 | 0.45 | 0.44 | 0.40 | 0.44 | 0.41 |
FeO* | 14.65 | 16.62 | 16.40 | 16.81 | 12.74 | 12.19 | 13.12 | 13.69 | 13.67 |
MnO | 0.01 | 0.09 | 0.11 | 0.06 | 0.03 | 0.05 | 0.04 | 0.07 | 0.04 |
MgO | 13.81 | 13.23 | 12.27 | 12.66 | 14.80 | 15.45 | 15.12 | 14.26 | 14.04 |
CaO | 0.00 | 0.00 | 0.02 | 0.00 | 0.07 | 0.00 | 0.01 | 0.07 | 0.00 |
Na2O | 0.03 | 0.03 | 0.03 | 0.04 | 0.11 | 0.05 | 0.05 | 0.11 | 0.04 |
K2O | 9.37 | 9.34 | 9.42 | 9.34 | 9.50 | 9.64 | 9.67 | 9.41 | 9.63 |
Total | 94.49 | 94.51 | 93.28 | 93.86 | 95.09 | 95.53 | 95.47 | 95.41 | 94.87 |
Si | 5.519 | 5.547 | 5.535 | 5.504 | 5.591 | 5.601 | 5.563 | 5.550 | 5.580 |
Ti | 0.572 | 0.550 | 0.602 | 0.586 | 0.618 | 0.584 | 0.574 | 0.648 | 0.661 |
Al | 2.640 | 2.504 | 2.548 | 2.543 | 2.480 | 2.497 | 2.509 | 2.493 | 2.447 |
Cr | 0.005 | 0.005 | 0.006 | 0.009 | 0.053 | 0.052 | 0.047 | 0.052 | 0.049 |
Fe2+ | 1.845 | 2.117 | 2.119 | 2.162 | 1.581 | 1.500 | 1.626 | 1.702 | 1.711 |
Mn | 0.002 | 0.011 | 0.014 | 0.008 | 0.003 | 0.006 | 0.005 | 0.008 | 0.005 |
Mg | 3.099 | 3.003 | 2.825 | 2.901 | 3.273 | 3.388 | 3.338 | 3.159 | 3.132 |
Ca | 0.000 | 0.000 | 0.003 | 0.000 | 0.011 | 0.000 | 0.001 | 0.011 | 0.000 |
Na | 0.009 | 0.007 | 0.009 | 0.013 | 0.031 | 0.013 | 0.015 | 0.031 | 0.012 |
K | 1.800 | 1.816 | 1.857 | 1.832 | 1.799 | 1.810 | 1.828 | 1.783 | 1.839 |
Total | 15.491 | 15.560 | 15.519 | 15.557 | 15.439 | 15.452 | 15.507 | 15.437 | 15.436 |
XMg | 0.63 | 0.59 | 0.57 | 0.57 | 0.67 | 0.69 | 0.67 | 0.65 | 0.65 |
SiO2 | 60.55 | 60.58 | 60.57 | 60.48 | 60.44 | 60.13 | 60.07 | 60.20 | 59.91 | 60.95 |
Al2O3 | 25.33 | 25.02 | 25.12 | 25.43 | 25.55 | 25.75 | 25.18 | 25.17 | 25.49 | 24.90 |
FeO* | 0.09 | 0.09 | 0.11 | 0.10 | 0.11 | 0.02 | 0.05 | 0.05 | 0.10 | 0.07 |
CaO | 6.31 | 6.48 | 6.67 | 6.36 | 6.55 | 6.82 | 6.75 | 6.72 | 6.91 | 6.24 |
Na2O | 7.40 | 7.67 | 7.47 | 7.49 | 7.65 | 7.45 | 7.32 | 7.43 | 7.41 | 7.66 |
K2O | 0.68 | 0.50 | 0.40 | 0.55 | 0.43 | 0.35 | 0.53 | 0.62 | 0.39 | 0.46 |
Total | 100.36 | 100.34 | 100.35 | 100.41 | 100.73 | 100.52 | 99.90 | 100.19 | 100.20 | 100.29 |
Si | 2.692 | 2.690 | 2.694 | 2.686 | 2.673 | 2.668 | 2.684 | 2.681 | 2.667 | 2.709 |
Al | 1.327 | 1.309 | 1.317 | 1.331 | 1.332 | 1.347 | 1.326 | 1.321 | 1.337 | 1.304 |
Fe3+ | 0.000 | 0.000 | 0.000 | 0.000 | 0.001 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
Fe2+ | 0.003 | 0.003 | 0.004 | 0.004 | 0.003 | 0.001 | 0.002 | 0.002 | 0.004 | 0.003 |
Ca | 0.301 | 0.308 | 0.318 | 0.303 | 0.310 | 0.324 | 0.323 | 0.320 | 0.330 | 0.297 |
Na | 0.638 | 0.661 | 0.644 | 0.645 | 0.656 | 0.641 | 0.634 | 0.641 | 0.640 | 0.660 |
K | 0.038 | 0.028 | 0.023 | 0.031 | 0.024 | 0.020 | 0.030 | 0.035 | 0.022 | 0.026 |
Total | 5.000 | 5.000 | 5.000 | 5.000 | 5.000 | 5.000 | 5.000 | 5.000 | 5.000 | 5.000 |
An | 30.77 | 30.91 | 32.26 | 30.93 | 31.33 | 32.92 | 32.72 | 32.15 | 33.26 | 30.21 |
Ab | 65.30 | 66.27 | 65.43 | 65.91 | 66.21 | 65.09 | 64.23 | 64.33 | 64.51 | 67.12 |
Or | 3.93 | 2.82 | 2.31 | 3.16 | 2.46 | 1.99 | 3.06 | 3.52 | 2.23 | 2.67 |
SiO2 | 51.68 | 51.86 | 52.20 | 52.05 | 52.20 | 52.94 | 52.82 | 52.87 | 52.98 | 52.98 |
TiO2 | 0.10 | 0.09 | 0.05 | 0.11 | 0.09 | 0.08 | 0.10 | 0.09 | 0.08 | 0.10 |
Al2O3 | 0.87 | 0.85 | 0.92 | 0.77 | 0.80 | 0.49 | 0.58 | 0.53 | 0.57 | 0.64 |
Cr2O3 | 0.02 | 0.01 | 0.00 | 0.03 | 0.00 | 0.05 | 0.10 | 0.05 | 0.05 | 0.08 |
FeO* | 25.46 | 25.42 | 24.74 | 25.07 | 26.72 | 24.49 | 22.65 | 23.40 | 23.30 | 23.15 |
MnO | 0.66 | 0.64 | 0.61 | 0.64 | 0.76 | 0.69 | 0.61 | 0.63 | 0.61 | 0.59 |
MgO | 19.69 | 19.83 | 20.38 | 20.03 | 18.94 | 20.89 | 21.07 | 21.49 | 21.23 | 21.35 |
CaO | 0.82 | 0.64 | 0.51 | 0.80 | 0.46 | 0.57 | 1.69 | 0.73 | 0.85 | 1.04 |
Na2O | 0.00 | 0.02 | 0.01 | 0.03 | 0.01 | 0.00 | 0.05 | 0.00 | 0.04 | 0.04 |
K2O | 0.00 | 0.01 | 0.00 | 0.00 | 0.01 | 0.03 | 0.01 | 0.00 | 0.01 | 0.00 |
Total | 99.32 | 99.37 | 99.43 | 99.54 | 99.99 | 100.23 | 99.67 | 99.80 | 99.72 | 99.99 |
Si | 1.971 | 1.975 | 1.979 | 1.976 | 1.990 | 1.989 | 1.985 | 1.985 | 1.992 | 1.985 |
Ti | 0.003 | 0.003 | 0.002 | 0.003 | 0.003 | 0.002 | 0.003 | 0.002 | 0.002 | 0.003 |
Al | 0.039 | 0.038 | 0.041 | 0.035 | 0.036 | 0.022 | 0.026 | 0.024 | 0.025 | 0.028 |
Cr | 0.001 | 0.000 | 0.000 | 0.001 | 0.000 | 0.001 | 0.003 | 0.001 | 0.001 | 0.003 |
Fe3+ | 0.013 | 0.007 | 0.000 | 0.008 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
Fe2+ | 0.799 | 0.802 | 0.785 | 0.788 | 0.852 | 0.770 | 0.712 | 0.735 | 0.733 | 0.725 |
Mn | 0.021 | 0.021 | 0.020 | 0.020 | 0.025 | 0.022 | 0.019 | 0.020 | 0.020 | 0.019 |
Mg | 1.119 | 1.126 | 1.152 | 1.134 | 1.076 | 1.170 | 1.181 | 1.203 | 1.190 | 1.192 |
Ca | 0.033 | 0.026 | 0.021 | 0.033 | 0.019 | 0.023 | 0.068 | 0.029 | 0.034 | 0.042 |
Na | 0.000 | 0.001 | 0.001 | 0.002 | 0.001 | 0.000 | 0.004 | 0.000 | 0.003 | 0.003 |
Total | 4.000 | 4.000 | 4.000 | 4.000 | 4.000 | 4.000 | 4.000 | 4.000 | 4.000 | 4.000 |
XMg | 0.58 | 0.58 | 0.59 | 0.59 | 0.56 | 0.60 | 0.62 | 0.62 | 0.62 | 0.62 |
Wo | 1.70 | 1.32 | 1.07 | 1.67 | 0.97 | 1.18 | 3.47 | 1.50 | 1.76 | 2.13 |
En | 56.98 | 57.40 | 58.85 | 57.77 | 55.28 | 59.61 | 60.22 | 61.15 | 60.80 | 60.85 |
Fs | 41.32 | 41.28 | 40.08 | 40.57 | 43.75 | 39.22 | 36.31 | 37.36 | 37.44 | 37.02 |
SiO2 | 42.71 | 42.70 | 42.86 | 41.79 | 43.34 | 52.67 | 52.74 | 53.24 | 52.89 |
TiO2 | 2.59 | 2.39 | 2.06 | 2.49 | 2.48 | 0.16 | 0.13 | 0.07 | 0.16 |
Al2O3 | 11.11 | 10.57 | 10.77 | 11.40 | 10.51 | 1.49 | 1.39 | 1.44 | 1.50 |
Cr2O3 | 0.13 | 0.05 | 0.06 | 0.10 | 0.08 | 0.00 | 0.02 | 0.08 | 0.08 |
FeO* | 14.09 | 15.61 | 15.77 | 15.84 | 15.30 | 9.41 | 10.37 | 9.66 | 9.17 |
MnO | 0.11 | 0.15 | 0.15 | 0.16 | 0.15 | 0.31 | 0.30 | 0.31 | 0.32 |
MgO | 11.58 | 11.30 | 11.01 | 10.55 | 11.46 | 13.66 | 13.42 | 14.27 | 14.30 |
CaO | 11.42 | 11.18 | 11.51 | 11.48 | 11.29 | 21.48 | 20.74 | 20.17 | 19.95 |
Na2O | 1.35 | 1.53 | 1.01 | 1.22 | 1.35 | 0.41 | 0.48 | 0.36 | 0.41 |
K2O | 1.61 | 1.37 | 1.43 | 1.55 | 1.33 | 0.00 | 0.00 | 0.00 | 0.00 |
Total | 96.70 | 96.86 | 96.63 | 96.58 | 97.29 | 99.59 | 99.58 | 99.60 | 98.76 |
Si | 6.382 | 6.379 | 6.414 | 6.296 | 6.427 | 1.972 | 1.980 | 1.991 | 1.991 |
Ti | 0.291 | 0.269 | 0.231 | 0.282 | 0.277 | 0.004 | 0.004 | 0.002 | 0.004 |
Al | 1.956 | 1.861 | 1.900 | 2.024 | 1.836 | 0.066 | 0.062 | 0.063 | 0.066 |
Cr | 0.016 | 0.005 | 0.007 | 0.011 | 0.010 | 0.000 | 0.000 | 0.002 | 0.002 |
fe3 | 0.326 | 0.555 | 0.548 | 0.448 | 0.518 | 0.012 | 0.006 | 0.000 | 0.000 |
Fe2+ | 1.435 | 1.394 | 1.426 | 1.548 | 1.379 | 0.283 | 0.319 | 0.302 | 0.289 |
Mn | 0.013 | 0.019 | 0.019 | 0.020 | 0.019 | 0.010 | 0.009 | 0.010 | 0.010 |
Mg | 2.581 | 2.517 | 2.456 | 2.371 | 2.534 | 0.762 | 0.751 | 0.796 | 0.802 |
Ca | 1.829 | 1.790 | 1.845 | 1.854 | 1.794 | 0.861 | 0.834 | 0.808 | 0.804 |
Na | 0.391 | 0.442 | 0.293 | 0.356 | 0.390 | 0.030 | 0.035 | 0.026 | 0.030 |
K | 0.306 | 0.262 | 0.273 | 0.297 | 0.251 | ||||
Total | 15.527 | 15.493 | 15.411 | 15.506 | 15.434 | 4.000 | 4.000 | 4.000 | 4.000 |
XMg | 0.59 | 0.56 | 0.55 | 0.54 | 0.57 | 0.72 | 0.70 | 0.72 | 0.74 |
Wo | 44.90 | 43.66 | 42.40 | 42.44 | |||||
En | 39.74 | 39.31 | 41.75 | 42.33 | |||||
Fs | 15.36 | 17.03 | 15.85 | 15.22 |