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Table 7. Partial chemical composition (wt. percent) of selected monazite ( bastnaesite)-fluorite (low-Fe, high-REE) banded 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]

Constituent

7B30-1      

7B30-11      

7B30-20      

7B30-32      

7B31-1A      

7B31-1B      

7B38-3      

Al2O3

0.13

0.08

0.06

0.36

0.66

0.40

.19

1Fe2O3

9.29

11.72

7.72

6.15

7.58

6.01

14.3

MgO

.23

.08

*

.55

1.11

.68

.13

CaO

4.57

37.78

27.98

25.18

3.78

29.38

39.18

K2O

*

*

*

*

.36

*

*

TiO2

.60

1.17

1.00

4.17

.18

.12

.08

MnO

.03

.02

.01

.23

.08

.06

.01

F

28.0

17.6

17.0

12.8

16.8

1.8

17.2

BaO

.30

.09

.04

7.70

.11

.04

3.57

Ce2O3

9.49

10.42

10.66

10.54

9.37

12.88

6.32

La2O3

5.04

5.28

4.69

6.33

5.98

8.33

4.10

Nd2O3

2.80

3.50

3.97

3.73

2.92

3.85

1.87

Nb2O5

.30

.47

.36

.33

.11

.11

.02

SrO

.09

.06

.05

.18

.06

.07

.10

Total

96.87

88.27

73.54

78.25

76.10

72.73

87.07

-O=F

11.79

7.41

7.16

5.39

7.07

4.55

7.24

Total

85.08

80.86

66.38

72.86

69.03

68.18

79.83

Total RE2O3

17.33

19.20

19.32

20.60

18.27

25.06

12.29

1Total Fe as Fe2O3.

 

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Last updated 12.17.97