| Autor: |
Halbach, Peter, von Borstel, Dieter, Gundermann, Karl-Dietrich |
| Zdroj: |
Chemical Geology; January 1980, Vol. 29 Issue: 1-4 p117-138, 22p |
| Abstrakt: |
The contents of uranium in the Brocken granite are bound to mineral phases like biotite, apatite, sphene and zircon. Due to the weathering during humid climatic conditions, U is primarily mobilized as UO22+from the bedrock; thus the U concentration in the Brocken granite has diminished from about 14 ppm to 2–3 ppm in the weathered parts. The surface waters of the investigated area show oxidative and acid conditions. These facts support a mobilisation of U. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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