National Uranium Resource Evaluation, Trona Quadrangle, California

Technical Report · Thu Jul 01 04:00:00 EDT 1982

OSTI ID:5261406

Bushnell, M M; Morton, P K

The Trona 2/sup 0/ Quadrangle, in southeastern California, was evaluated according to criteria of developed for the National Uranium Resource Evaluation Program to identify areas favorable for the occurrence of uranium deposits. General reconnaissance and sampling were conducted in all accessible areas of the quadrangle. Detailed surface investigations were conducted in potentially favorable environments. Subsurface data were limited to the available results of previous drilling. The results of these studies indicate that granitic rock in the Castle Butte and Boron 15' quadrangles is favorable for authigenic uranium deposits; vein-type and stratabound deposits within tuffaceous sandstones of the Tropico Group in the same area are favorable; Barstow Formation sandstones and shales are favorable in carbonaceous shale and in peneconcordant sandstone in the south-central part of the quadrangle; and sediments of the Lake Tecopa Beds in the northeast of the quadrangle are favorable for hydroallogenic deposits. Environments unfavorable for uranium deposits are in Precambrian and Paleozoic metasedimentary and metavolcanic rocks, except those in unevaluated areas; in plutonic and volcanic rocks of Mesozoic Age, except the favorable granite in the Castle Butte and Boron quadrangles; in Tertiary sedimentary and volcanic rocks, except those favorable in the Tropico Group and Barstow Formation; and in Quaternary volcanic rocks and sediments, except the favorable deposits at Lake Tecopa and the unevaluated alluvium. Two inaccessible areas and the alluvium are unevaluated.

• Research Organization: Bendix Field Engineering Corp., Grand Junction, CO (USA). Grand Junction Operations; California State Dept. of Conservation, Sacramento (USA). Div. of Mines and Geology
• DOE Contract Number: AC13-76GJ01664
• OSTI ID: 5261406
• Report Number(s): PGJ/F-038-82; ON: DE82016289
• Country of Publication: United States
• Language: English

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