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Table 11. Partial chemical composition (wt. percent) of marble-hosted alkali amphibole-magnetite 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 TiO2=0.03]

Constituent

7B33-5

7B33-6A

7B33-6B

7B33-7

Al2O3

0.17

0.28

0.36

0.25

1Fe2O3

17.16

17.16

15.73

24.31

MgO

4.64

4.97

5.31

4.81

CaO

20.99

19.59

19.59

19.59

K2O

.48

.60

.72

.48

TiO2

.03

*

.03

.03

MnO

3.49

4.26

5.42

3.87

F

9.58

9.58

7.98

7.18

BaO

.02

.04

.04

.03

Ce2O3

2.22

1.76

2.46

2.11

La2O3

.96

.83

1.17

.88

Nd2O3

.97

.76

.98

.86

Nb2O5

.01

.01

.01

.01

SrO

.11

.13

.11

.13

Total

60.83

59.97

59.91

64.54

-O=F

4.03

4.03

3.36

3.02

Total

56.80

55.94

56.55

61.52

Total RE2O3

4.15

3.35

4.61

3.85

1Total Fe as Fe2O3.

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Last updated 12.17.97