Table 5 Comparison table of the average concentrations of ƩREEs (ppm) in North Kochakali coal mine with Parvadeh coal mine44, China jurassic coal (Erlian Basin)45, continental crust46, and world coal ash47.

From: Application of fractal models for determining the relationship between REEs and faults in North Kochakali coal deposit, Central Iran

Elements

Y

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

Sc

La

Ce

Pr

Nd

Sm

Eu

ƩREEs

North Kochakali Coal mine

41.63

13.4

3.2

12.3

0.9

6.3

0.9

4

0.8

36.5

39

82

14

59.9

13.5

3.2

331.5

Parvadeh Coal Mine

20.34

6.75

1.16

5.25

1.26

2.82

0.1

3.24

0.12

17.82

33.26

68.48

-

19.22

31

1.96

212.7

Erlian Basin

106.7

12.64

2.51

12.89

2.73

7.62

1.11

7.57

1.51

 

53.94

101.90

13.59

57.65

13.15

1.84

397.3

Continental crust

33

6.2

1.2

5.2

1.3

3.5

0.52

3.2

0.8

22

39

66.5

9.2

41.5

7

2

242.1

World coal ash

57

16

2.1

15

4.8

6.4

2.2

6.9

1.3

24

76

140

26

75

14

2.6

469.3

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