Table 2 Average compositions of minerals from dyke-type rodingite and metagabbro
Dyke-type rodingite131018-1B | Metagabbro 131019-MG | |||||||
|---|---|---|---|---|---|---|---|---|
Di | Grt1a | Grt 2b | Chl | Di | Chl | Ttn | Ep | |
n c = 10 | n = 7 | n = 10 | n = 6 | n = 5 | n = 3 | n = 3 | n = 13 | |
SiO2 | 54.66 | 39.26 | 39.95 | 29.69 | 53.32 | 29.81 | 30.75 | 39.26 |
TiO2 | – | 0.15 | – | – | – | – | 38.47 | – |
Al2O3 | 1.18 | 18.04 | 21.49 | 21.18 | 2.01 | 20.25 | 1.19 | 29.10 |
Fe2O3 | – | 5.85 | 1.34 | – | – | – | – | 5.40 |
FeO | 2.59 | – | – | 3.77 | 4.93 | 4.55 | 0.41 | – |
MnO | – | 0.50 | – | – | – | 0.19 | – | – |
MgO | 16.81 | – | – | 29.70 | 15.61 | 29.48 | – | – |
CaO | 24.80 | 36.17 | 36.96 | 0.09 | 23.72 | – | 29.10 | 24.68 |
Na2O | – | – | – | – | 0.44 | – | – | – |
Total | 100.04 | 99.97 | 99.74 | 84.43 | 100.03 | 84.28 | 99.92 | 98.44 |
apfu | apfu | |||||||
O | 6 | 12 | 12 | 28 | 6 | 28 | 5 | 12.5 |
Si | 1.98 | 3.01 | 3.01 | 5.76 | 1.95 | 5.82 | 1.00 | 3.02 |
Ti | – | 0.01 | – | – | – | – | 0.95 | – |
Al | 0.05 | 1.63 | 1.91 | 4.84 | 0.09 | 4.66 | 0.05 | 2.64 |
Fe3+ | – | 0.34 | 0.08 | – | – | – | – | 0.31 |
Fe2+ | 0.08 | – | – | 0.61 | 0.15 | 0.74 | 0.01 | – |
Mn | – | 0.03 | – | – | – | 0.03 | – | – |
Mg | 0.91 | – | – | 8.59 | 0.86 | 8.58 | – | – |
Ca | 0.96 | 2.97 | 2.98 | 0.02 | 0.93 | – | 1.02 | 2.03 |
Na | – | – | – | – | 0.03 | – | – | – |
Σcation | 3.98 | 7.99 | 7.98 | 19.82 | 4.01 | 19.83 | 3.03 | 8.00 |
XMg | 0.92 | – | – | 0.93 | 0.85 | 0.92 | – | – |
XSps | – | 0.01 | – | – | – | – | – | – |
XGrs | – | 0.82 | 0.96 | – | – | – | – | – |
XAdr | – | 0.17 | 0.04 | – | – | – | – | – |