Major Oxides (%)

Talc-chlorite schist

Amphibolites

Quartz-mica schist

Mean

Range

Mean

Range

Mean

Range

SiO₂

57.53

55.26 - 59.15

55.11

49.67 - 67.19

63.65

50.05 - 67.46

TiO₂

0.11

0.03 - 0.34

1.15

0.72 - 1.36

0.98

0.82 - 1.35

Al₂O₃

2.60

1.59 - 3.30

13.26

12.13 - 15.16

14.60

12.17 - 15.31

Fe₂O₃

7.73

5.78 - 11.35

9.73

6.29 - 11.15

7.48

6.19 - 11.13

MnO

0.11

0.04 - 0.21

0.17

0.10 - 0.20

0.12

0.10 - 0.20

MgO

24.84

22.19 - 26.98

6.06

1.64 - 7.24

2.93

1.60 - 7.21

CaO

0.64

0.11 - 1.74

7.98

1.50 - 10.96

3.52

1.51 - 10.32

Na₂O

0.04

0.02 - 0.10

1.40

1.00 - 2.33

1.80

1.01 - 2.08

K₂O

0.03

0.01 - 0.08

2.18

0.66 - 6.66

2.26

1.12 - 2.71

P₂O₅

0.02

0.01 - 0.03

0.37

0.11 - 1.09

0.16

0.10 - 0.20

Trace Elements (ppm)

Ba

20

8 - 38

840

238 - 2732

567

417 - 638

Co

76

65 - 88

3

1 - 7

21

13 - 43

Cr

2486

1772 - 3290

266

90 - 320

145

70 - 330

Cu

26

3 - 70

34

22 - 41

26

21 - 46

Ni

1246

833 - 1568

81

29 - 102

48

27 - 100

Pb

0.72

0.2 - 2

16

3 - 25

7

3 - 19

Rb

2

0.3 - 10

76

17 - 242

81

28 - 101

Sr

12

5 - 35

556

216 - 916

293

214 - 560

V

48

33 - 65

207

100 - 263

139

96 - 261

Zn

16

6 - 34

39

20 - 52

46

40 - 52