Factors controlling tungsten concentrations in ground water, Carson Desert, Nevada

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• 作者：Seiler ; Ralph L. ; Stollenwerk ; Kenneth G. ; Garbarino ; John R.
• 刊名：Applied Geochemistry
• 出版年：2005
• 出版时间：February, 2005
• 年：2005
• 卷：20
• 期：2
• 页码：423-441
• 全文大小：917 K

文摘

An investigation of a childhood leukemia cluster by US Centers for Disease Control and Prevention revealed that residents of the Carson Desert, Nevada, are exposed to high levels of W and this prompted an investigation of W in aquifers used as drinking water sources. Tungsten concentrations in 100 ground water samples from all aquifers used as drinking water sources in the area ranged from 0.27 to 742 ??g/l. Ground water in which W concentrations exceed 50 ??g/l principally occurs SE of Fallon in a geothermal area. The principal sources of W in ground water are natural and include erosion of W-bearing mineral deposits in the Carson River watershed upstream of Fallon, and, possibly, upwelling geothermal waters. Ground water in the Fallon area is strongly reducing and reductive dissolution of Fe and Mn oxyhydroxides may be releasing W; however, direct evidence that the metal oxides contain W is not available.