Chapter IN
INTRODUCTION
By R.M. Flores and D.J. Nichols
in U.S. Geological Survey Professional Paper 1625-A
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Table IN-3. Arithmetic
means of concentrations of trace elements of environmental concern in parts
per million in coal assessed in the Powder River and Williston Basins compared
to similar analyses from other coal-producing regions in the conterminous
United States
| Parameter |
Powder River Basin* |
Williston Basin |
Colorado Plateau |
Gulf Coast |
Illinois Basin |
Appalachian Basin |
| Arsenic |
2.6 |
9.1 |
3.1 |
5.1 |
10 |
22 |
| Beryllium |
0.54 |
0.73 |
1.6 |
2.3 |
1.5 |
2.4 |
| Cadmium |
0.21 |
0.08 |
0.11 |
0.22 |
2.6 |
0.10 |
| Cobalt |
1.9 |
2.9 |
2.2 |
4.7 |
4.8 |
6.7 |
| Chromium |
6.1 |
7.4 |
8.0 |
15 |
9.6 |
17 |
| Mercury |
0.13 |
0.14 |
0.095 |
0.20 |
0.11 |
0.19 |
| Manganese |
26.0 |
75.0 |
35 |
130 |
69 |
25 |
| Nickel |
4.6 |
4.3 |
5.9 |
12 |
15 |
16 |
| Lead |
3.0 |
3.5 |
9.2 |
8.8 |
27 |
8.9 |
| Antimony |
0.50 |
0.60 |
0.78 |
0.89 |
1.0 |
1.0 |
| Selenium |
1.1 |
0.74 |
1.5 |
1.5 |
2.0 |
3.4 |
| Uranium |
1.3 |
1.5 |
2.0 |
5.0 |
2.3 |
1.8 |
* Only the Wyodak-Anderson coal zone is included in the Powder
River Basin in this study. All data on a whole-coal and remnant-moisture
basis. |
Chapter IN - Introduction -
U.S. Geological Survey Professional Paper 1625-A