Hydrogeology of an ancient arid closed basin: Implications for tabular sandstone-hosted uranium deposits

Geology
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Abstract

Hydrogeologic modeling shows that tabular-type uranium deposits in the Grants uranium region of the San Juan basin, New Mexico, formed in zones of ascending and discharging regional ground-water flow. The association of either lacustrine mudstone or actively subsiding structures and uranium deposits can best be explained by the occurrence of lakes at topographic depressions where ground water having different sources and compositions is likely to converge, mix, and discharge. Ascending and discharging flow also explains the association of uranium deposits with underlying evaporites and suggests a brine interface. The simulations contradict previous suggestions that ground water moved downward in the mudflat.

Publication type Article
Publication Subtype Journal Article
Title Hydrogeology of an ancient arid closed basin: Implications for tabular sandstone-hosted uranium deposits
Series title Geology
DOI 10.1130/0091-7613(1990)018<1099:HOAAAC>2.3.CO;2
Volume 18
Issue 11
Year Published 1990
Language English
Publisher Geological Society of America
Description 4 p.
First page 1099
Last page 1102
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