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 |
This page is https://pubs.usgs.gov/bulletin/b2143/table7.html
Maintained by John Watson
Last updated 12.17.97