National uranium resource evaluation: Saint Johns Quadrangle, Arizona and New Mexico

Technical Report · Sat May 01 04:00:00 EDT 1982

OSTI ID:5369000

May, R T; Foster, M G; Daw, P E; Brouillard, L A; White, D L

The Saint Johns one- by two-degree quadrangle, Arizona and New Mexico, was evaluated to identify environments and delineate areas favorable for the occurrence of uranium deposits. The criteria used was formulated for the National Uranium Resource Evaluation program. Evidence for the determination was drawn from surface and subsurface studies, hydrogeochemical and stream-sediment reconnaissance, aerial radiometric surveys, and carborne- radiometric studies. The quadrangle is within the Colorado Plateau physiographic province. Environments favorable for uranium deposits include channel-controlled peneconcordant sandstone deposits in the lower Chinle Formation of Triassic age in the northwestern part of the quadrangle and sandstone deposits in the interval of the lower Baca Formation of Tertiary age and the upper Mesaverde Group of Cretaceous age in the east-central part of the quadrangle. No other favorable areas were noted for uranium deposits in sandstone, limestone, volcanogenic, or lacustrine environments. Much of the subsurface is unevaluated because of insufficient data. Although most of the favorble criteria for magnetic-hydrothermal deposits are satisfied within vein systems in Precambrian granitic terrane of the Zuni Mountains, extensive exploration and development in the area shows that no uranium concentration has occurred.

• Research Organization: Bendix Field Engineering Corp., Grand Junction, CO (USA)
• DOE Contract Number: AC13-76GJ01664
• OSTI ID: 5369000
• Report Number(s): PGJ/F-011(82); ON: DE82014838
• Country of Publication: United States
• Language: English

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FEDERAL REGION VI
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