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Table 11 Definition of the ERV and calculation of the EBC of the 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)

Microdomain Image Analysis Results

           

Mineral

Pixels

%

           

Wm

69,267

27.78

           

Grt

5685

2.28

           

Cpx

55,404

22.22

           

Qtz

78,543

31.50

           

Kfs

37,002

14.84

           

Ttn

4098

1.38

           

Total

250,000

100.00

           

Maps resolution

250,000

100.00

           

Mineral average composition

New Modal  %

Na2O

TiO2

MnO

K2O

MgO

SiO2

Fe2O3

FeO

CaO

Al2O3

H2O

Total

Wm

27.78

0.04

0.06

0.17

10.48

3.00

52.04

0.00

3.43

0.05

26.46

4.27

100.00

Grt

2.28

0.03

0.34

1.91

0.03

0.01

39.01

5.17

0.79

34.10

18.66

0.00

100.05

Cpx

22.22

14.50

0.03

0.03

0.02

0.43

58.86

2.99

1.13

0.77

21.97

0.00

100.71

Qtz

31.50

0.00

0.00

0.00

0.00

0.00

100.00

0.00

0.00

0.00

0.00

0.00

100.00

Kfs

14.84

0.38

0.02

0.01

16.25

0.01

65.32

0.00

0.07

0.01

19.04

0.00

101.11

Ttn

1.38

0.04

33.33

0.00

0.07

0.04

31.28

0.00

1.93

27.87

3.95

0.00

98.51

EBC

100.00

3.29

0.50

0.10

5.33

0.93

70.05

0.78

1.26

1.35

15.54

1.19

100.30

EBC normalized with no H2O

100.00

3.32

0.50

0.10

5.37

0.94

70.67

0.79

1.27

1.36

15.68

0.00

100.00