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