All samples

PAAS

NASC

Upper continental crust

Reference

This study

1

2

3

SiO2

74.96

62.8

64.8

66.6

Al2O3

12.66

18.9

16.9

15.4

Fe2O3

1.99

6.5

5.67

5.04

TiO2

0.21

1

0.7

0.64

MgO

0.54

2.2

2.886

2.48

MnO

0.09

0.11

0.06

0.1

CaO

0.96

1.3

3.63

3.59

Na2O

4.23

1.2

1.14

3.27

K2O

3.59

3.7

3.97

2.8

P2O5

0.06

0.16

0.13

0.15

Total

100.00

97.87

99.86

100.05

Ni

7.40

55

58

47

Cr

18.20

110

125

92

Sc

5.28

16

15

14

V

24.5

150

130

97

Cs

8.33

15

5.16

4.9

Ba

620

650

636

628

Rb

140.16

160

125

82

Sr

81.75

200

142

320

Hf

2.41

5

6.3

5.3

Zr

63.50

210

200

193

Y

11.54

27

35

21

Ta

12.48

1.28

1.12

0.9

Nb

23.82

19

13

12

Ga

20.49

-

-

17.5

Cu

15.03

-

-

28

Zn

66.65

-

-

67

Pb

19.41

20

20

17

Th

10.38

14.6

12.3

10.5

U

2.39

3.1

2.7

2.7

La

24.89

38.2

31.1

31

Ce

52.22

79.6

66.7

63

Pr

6.11

8.83

-

7.1

Nd

22.15

33.9

27.4

27