Sample number

SiO₂

Al2O₃

Na₂O

Cr

Co

Ni

Cu

Zn

As

Pb

V

Rock type

5

77.9

13.0

3.6

-

-

9.9

17.8

18.6

10.2

49.7

3.0

Felsic

6

74.9

14.2

4.4

0.6

0.9

7.4

7.0

23.5

3.5

21.4

3.9

Felsic

7

51.8

10.7

2.6

35.4

66.4

53.4

245.6

117.6

0.0

2.6

280.7

Basic

8

71.8

14.9

5.3

-

3.5

6.5

7.5

45.7

4.2

24.2

30.2

Felsic

9

43.7

10.9

0.5

439.8

44.7

341.2

29.7

270.6

1.8

18.2

164.1

Ultramafic

10

50.9

26.6

2.7

20.4

3.0

18.1

6.6

33.6

0.5

9.3

28.3

Basic

11

68.3

16.0

0.5

12.9

6.9

9.8

5.7

22.0

0.9

11.0

46.8

Felsic

12

87.8

8.8

2.5

16.3

0.4

38.9

11.2

16.8

3.4

20.8

-

Felsic

Mean

65.9

14.4

2.8

64.5

15.7

60.6

41.4

68.6

3.0

49.7

3.0