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Open-File Report 2010–1195

An Occurrence Model for the National Assessment of Volcanogenic Beryllium Deposits

By Nora K. Foley, Robert R. Seal, II, Nadine M. Piatak, and Brianna Hetland

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ABSTRACT

The general occurrence model summarized here is intended to provide a descriptive basis for the identification and assessment of undiscovered beryllium deposits of a type and style similar to those found at Spor Mountain, Juab County, Utah. The assessment model is restricted in its application in order to provide a coherent basis for assessing the probability of the occurrence of similar economic deposits using the current U.S. Geological Survey methodology. The model is intended to be used to identify tracts of land where volcanogenic epithermal replacement-type beryllium deposits hosted by metaluminous to peraluminous rhyolite are most likely to occur. Only a limited number of deposits or districts of this type are known, and only the ores of the Spor Mountain district have been studied in detail. The model highlights those distinctive aspects and features of volcanogenic epithermal beryllium deposits that pertain to the development of assessment criteria and puts forward a baseline analysis of the geoenvironmental consequences of mining deposits of this type.

Posted September 2010

For additional information contact:
Nora Foley
U.S. Geological Survey
12201 Sunrise Valley Drive, MS 954
Reston, VA 20192

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Suggested citation:

Foley, N.K., Seal, R.R., II, Piatak, N.M., and Hetland, B.R., 2010, An occurrence model for the national assessment of volcanogenic beryllium deposits: U.S. Geological Survey Open-File Report 2010-1195, 4 p.



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