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Table 12. Partial chemical composition (wt. percent) of quartzite-hosted ores of Bayan Obo.

[Analyst: P.H. Briggs. Analysis by inductively coupled plasma-atomic emission spectrometry (ICP-AES) for all oxides reported; SiO2, Na2O, P2O5, and CO2 were not determined.
Analysts: J. Sharkey and E. Brandt. Analysis by ion-selective electrode (ISE) for F.
*, below minimum detection level (MDL); MDL for K2O=0.24, MgO=0.03, MnO=0.01, and TiO2=0.03]

Constituent

7B30-38    

7B30-39    

7B30-41A    

7B30-41B    

7B30-43    

7B30-52A    

7B30-52B    

7B30-53A    

7B30-53B    

Al2O3

0.06

0.04

0.08

0.11

0.60

0.21

1.57

0.43

0.42

1Fe2O3

4.15

9.15

12.2

20.02

13.73

6.15

7.86

3.29

7.01

MgO

*

*

*

.07

.35

.08

.12

.10

.12

CaO

26.58

22.38

4.34

4.76

4.20

23.79

25.19

32.18

34.98

K2O

*

*

*

*

.36

*

1.44

*

*

TiO2

.28

*

.07

.10

.40

.23

.38

.15

.13

MnO

.02

*

.09

.37

.04

.02

.03

.01

.01

F

14.4

1.4

1.98

1.78

1.58

13.6

13.6

19.0

21.0

BaO

3.80

1.23

5.36

2.79

2.34

4.35

2.01

6.03

6.81

Ce2O3

4.80

1.87

.87

.94

1.99

5.86

3.98

7.96

5.39

La2O3

2.81

1.04

.35

.77

.55

2.58

2.23

3.99

2.81

Nd2O3

1.28

.44

.49

.30

.92

1.63

1.11

2.22

1.52

Nb2O5

.02

.01

.02

.02

.04

.02

.02

.02

.01

SrO

.06

.04

.04

.04

.11

.22

.17

.15

.14

Total

58.26

46.60

25.89

32.07

27.21

58.74

59.71

75.53

80.35

-O=F

6.06

4.38

0.83

0.75

0.66

5.73

5.73

8.00

8.84

Total

52.20

42.22

25.06

31.32

26.55

53.01

53.98

67.53

71.51

Total RE2O3

7.89

3.35

1.71

2.01

3.46

10.07

7.32

14.17

9.72
1Total Fe as Fe2O3.

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Last updated 12.17.97