Uranium in stream and mineral water of the Federal Republic of Germany |
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Authors: | Manfred Birke Uwe Rauch Hans Lorenz |
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Institution: | (1) Federal Institute for Geosciences and Natural Resources, Stilleweg 2, 30655 Hannover, Germany;(2) Federal Institute for Geosciences and Natural Resources, Branch Office Berlin, Wilhelmstrasse 25-30, 13593 Berlin, Germany |
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Abstract: | The concentration of uranium was determined in 944 samples from stream water by the inductively coupled plasma quadrupole
mass spectrometry (ICP-QMS) method and represented on a color-shaded contour map. Uranium concentrations in surface water
were determined to be between 0.007 μg/l and 43.7 μg/l with median of 0.33 μg/l. The regional distribution of uranium is influenced
primarily by lithological and anthropogenic factors. In Mecklenburg, northern Brandenburg, and eastern Schleswig-Holstein,
elevated uranium concentrations coincide with the extent of the last Weichselian ice sheet. The maximum concentrations are
observed in the surface waters of the old mining districts in the western part of the Ore Mountains and in eastern Thuringia.
Elevated concentrations are found in areas of agriculturally used loess soils. These concentrations correlate with the use
of phosphate fertilizers. There is a zone of elevated concentrations up to 10.0 μg U/l in the Keuper Sandstone area south
of the Thuringian Forest and from northwest of Stuttgart as far as Coburg. The distribution of elevated values in mineral
water shows a clear correlation with the elevated values in surface water and the geology of those locations. Bunter and Keuper
strata are the most important uranium source. |
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