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Table 7 Representative analysis of main minerals of orthogneiss (ZR19)

From: Blueschist mylonitic zones accommodating syn-subduction exhumation of deeply buried continental crust: the example of the Rocca Canavese Thrust Sheets Unit (Sesia–Lanzo Zone, Italian Western Alps)

Mineral Jd1 Jd2 Wm1 Wm2 Grt1 Kfs1
SiO2 59.36 57.64 53.44 51.27 39.22 64.59
TiO2 0.06 0.03 0.06 0.08 0.41 0.05
Al2O3 24.12 17.61 24.76 27.56 18.45 18.68
FeOt 1.34 7.79 4.73 3.34 5.65 0.1
NiO 0 0 0 0 0 0
MnO 0.04 0.08 0.17 0.12 1.78 0
MgO 0.17 0.89 2.64 2.98 0.02 0
CaO 0.32 1.66 0.13 0.04 34.42 0
Na2O 14.81 13.91 0.03 0.02 0.03 0.45
K2O 0.02 0 9.74 11.24 0.03 16.28
Cr2O3 0.05 0 0.06 0.01 0 0.09
TOT 100.29 99.61 95.76 96.66 100.01 100.23
Si 2.01 2 3.56 3.4 3 2.98
AlIV 0 0 0.44 0.6 0 1.02
AlVI 0.96 0.72 1.5 1.55 1.66  
Ti 0 0 0   0.02 0
Fe2+ 0.04 0.02 0.26 0.19 0.05 0
Fe3+ 0 0.21   0 0.31  
Mg 0.01 0.05 0.26 0.29 0 0
Mn 0 0 0.01 0.01 0.12 0
Na 0.97 0.94 0 0 0 0.04
Ca 0.01 0 0.01 0 2.82 0
K 0 0.06 0.83 0.95 0 0.96
Cr 0 0 0 0 0 0
SUM 4 4 6.87 6.99 7.98 5