Sample | 36 | 35 | 31 | 38 | 33 | 34 | 32 | 37 | 39 |
c | c | c | c | c | r | r | r | r | |
SiO2 | 45.34 | 48.71 | 47.22 | 44.12 | 42.74 | 46.33 | 45.19 | 45.74 | 45.41 |
TiO2 | 3.23 | 1.29 | 1.81 | 3.61 | 4.17 | 2.67 | 3.25 | 3.22 | 3.33 |
Al2O3 | 6.96 | 3.59 | 4.77 | 7.76 | 8.79 | 5.61 | 6.68 | 6.97 | 7.08 |
Cr2O3 | 0.01 | 0.01 | 0.01 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 |
FeO | 10.33 | 10.50 | 10.40 | 9.11 | 9.01 | 9.64 | 8.72 | 8.27 | 7.92 |
MnO | 0.41 | 0.46 | 0.46 | 0.34 | 0.24 | 0.38 | 0.26 | 0.25 | 0.25 |
MgO | 9.94 | 10.56 | 10.24 | 10.09 | 9.97 | 10.58 | 10.74 | 11.40 | 11.14 |
CaO | 22.82 | 23.54 | 22.53 | 23.38 | 23.07 | 22.75 | 22.99 | 23.50 | 23.34 |
Na2O | 0.93 | 0.96 | 1.01 | 0.74 | 0.72 | 0.85 | 0.78 | 0.64 | 0.76 |
ZrO2 | 0.14 | 0.06 | 0.09 | 0.14 | 0.14 | 0.12 | 0.12 | 0.10 | 0.12 |
TOTAL | 100.11 | 99.68 | 98.54 | 99.29 | 98.85 | 98.93 | 98.74 | 100.10 | 99.36 |
Si | 1.7093 | 1.8391 | 1.8040 | 1.6731 | 1.6279 | 1.7619 | 1.7176 | 1.7104 | 1.7096 |
Ti | 0.0916 | 0.0366 | 0.0520 | 0.1030 | 0.1195 | 0.0764 | 0.0929 | 0.0906 | 0.0943 |
Al | 0.3092 | 0.1597 | 0.2148 | 0.3468 | 0.3946 | 0.2514 | 0.2992 | 0.3072 | 0.3141 |
Cr | 0.0003 | 0.0003 | 0.0003 | 0.0000 | 0.0000 | 0.0000 | 0.0003 | 0.0003 | 0.0003 |
Fe3+ | 0.1541 | 0.1576 | 0.1461 | 0.1528 | 0.1612 | 0.1326 | 0.1347 | 0.1353 | 0.1310 |
Fe2+ | 0.1715 | 0.1739 | 0.1862 | 0.1361 | 0.1258 | 0.1740 | 0.1425 | 0.1233 | 0.1184 |
Mn | 0.0131 | 0.0147 | 0.0149 | 0.0109 | 0.0077 | 0.0122 | 0.0084 | 0.0079 | 0.0080 |
Mg | 0.5587 | 0.5944 | 0.5832 | 0.5704 | 0.5661 | 0.5998 | 0.6086 | 0.6355 | 0.6253 |
Ca | 0.9217 | 0.9522 | 0.9221 | 0.9499 | 0.9414 | 0.9269 | 0.9362 | 0.9414 | 0.9414 |
Na | 0.0680 | 0.0703 | 0.0748 | 0.0544 | 0.0532 | 0.0627 | 0.0575 | 0.0464 | 0.0555 |
Total cations | 4.0000 | 4.0000 | 4.0000 | 4.0000 | 4.0000 | 4.0000 | 4.0000 | 4.0000 | 4.0000 |
Wo | 50.08 | 52.16 | 50.42 | 51.23 | 50.65 | 49.92 | 50.27 | 49.96 | 50.47 |
En | 39.36 | 38.09 | 38.48 | 40.80 | 42.02 | 39.72 | 41.36 | 43.17 | 42.73 |
Fs | 10.57 | 9.75 | 11.11 | 7.97 | 7.33 | 10.36 | 8.37 | 6.87 | 6.80 |
AlVI | 0.0185 | 0.0000 | 0.0187 | 0.0199 | 0.0225 | 0.0133 | 0.0168 | 0.0175 | 0.0238 |
AlIV | 0.2907 | 0.1597 | 0.1960 | 0.3269 | 0.3721 | 0.2381 | 0.2824 | 0.2896 | 0.2904 |
AlVI/AlIV | 0.0637 | 0.0000 | 0.0956 | 0.0610 | 0.0605 | 0.0558 | 0.0597 | 0.0604 | 0.0819 |
Fe(+3) Y | 0.1541 | 0.1565 | 0.1461 | 0.1528 | 0.1612 | 0.1326 | 0.1347 | 0.1353 | 0.1310 |
Ti/Al | 0.2962 | 0.2293 | 0.2422 | 0.2969 | 0.3028 | 0.3037 | 0.3105 | 0.2948 | 0.3002 |
Mg/(Mg + Fe2+) | 0.63 | 0.64 | 0.64 | 0.66 | 0.66 | 0.66 | 0.69 | 0.71 | 0.71 |