Isotopic fractionation of uranium in sandstone

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Relatively unoxidized black uranium ores from sandstone deposits in the western United States show deviations in the uranium-235 to uranium-234 ratio throughout a range from 40 percent excess uranium-234 to 40 percent deficient uranium-234 with respect to a reference uranium-235 to uranium-234 ratio. The deficient uranium-234 is leached preferentially to uranium-238 and the excess uranium-234 is believed to result from deposition of uranium-234 enriched in solutions from leached deposits.
Publication type Article
Publication Subtype Journal Article
Title Isotopic fractionation of uranium in sandstone
Series title Science
Volume 139
Issue 3551
Year Published 1963
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Science
First page 224
Last page 226
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