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Table 6 Representative analysis of main minerals of garnet-free gneiss (CR115)

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

Omp1

Aeg1

Wm1

Wm2

Ep1

Ep2

Bt1

SiO2

59.6

58.72

55.78

53.39

53.93

51.58

38.77

38.1

43.12

TiO2

0.04

0.09

0

0

0.04

0.07

0.04

0.03

0

Al2O3

24.73

18.77

10.63

1.46

25.48

27.44

25.59

25.67

19.6

FeOt

0.55

6.43

8.73

26.18

3.63

3.71

10.41

9.36

13.97

NiO

0

0

0

0

0

0

0

0

0

MnO

0

0.12

0.49

0.14

0.11

0.12

0.14

0.14

0.26

MgO

0.04

0.86

5

2.05

3.12

3.33

0

0.01

9.02

CaO

0.23

1.71

10.8

3.76

0

0

23.28

22.68

0.05

Na2O

14.98

14.2

8.65

12.56

0.04

0.04

0.01

0.01

0.24

K2O

0

0

0.06

0.01

11.19

11.32

0.06

0.02

9.99

Cr2O3

0.02

0.01

0

0

0

0

0.02

0

0

TOT

100.19

100.91

100.14

99.55

97.54

97.61

98.33

96.03

96.3

Si

2.01

2.01

1.99

1.97

3.53

3.39

3.02

3.03

3.1

AlIV

0

0

0.01

0.03

0.47

0.61

0

0

0.9

AlVI

0.98

0.76

0.44

0.03

1.5

1.52

2.35

2.4

0.76

Ti

0

0

0

0

0

0

0

0

0

Fe2+

0.02

0.02

0.09

0

0.2

0.2

0.03

0.03

0.81

Fe3+

0

0.17

0.17

0.81

  

0.65

0.59

0.03

Mg

0

0.04

0.27

0.11

0.3

0.33

0

0

0.97

Mn

0

0

0.01

0

  

0.01

0.01

0.02

Na

0.98

0.94

0.6

0.9

0

0

0

0

0.03

Ca

0.01

0.06

0.41

0.15

0

0

1.94

1.93

0

K

0

0

0

0

0.94

0.95

0.01

0

0.92

Cr

0

0

0

0

0

0

0

0

0

SUM

4

4

3.99

4

6.94

7

8.01

7.99

7.53