National Uranium Resource Evaluation: Durango Quadrangle, Colorado

Technical Report · Mon Jun 01 00:00:00 EDT 1981

OSTI ID:6209955

Theis, N J; Madson, M E; Rosenlund, G C; Reinhart, W R; Gardner, H A

The Durango Quadrangle (2/sup 0/), Colorado, was evaluated using National Uranium Resource Evaluation criteria to determine environments favorable for uranium deposits. General reconnaissance, geologic and radiometric investigations, was augmented by detailed surface examination and radiometric and geochemical studies in selected areas. Eight areas favorable for uranium deposits were delineated. Favorable geologic environments include roscoelite-type vanadium-uranium deposits in the Placerville and Barlow Creek-Hermosa Creek districts, sandstone uranium deposits along Hermosa Creek, and vein uranium deposits in the Precambrian rocks of the Needle Mountains area and in the Paleozoic rocks of the Tuckerville and Piedra River Canyon areas. The major portions of the San Juan volcanic field, the San Juan Basin, and the San Luis Basin within the quadrangle were judged unfavorable. Due to lack of information, the roscoelite belt below 1000 ft (300 m), the Eolus Granite below 0.5 mi (0.8 km), and the Lake City caldera are unevaluated. The Precambrian Y melasyenite of Ute Creek and the Animas Formation within the Southern Ute Indian Reservation are unevaluated due to lack of access.

• Research Organization: Bendix Field Engineering Corp., Grand Junction, CO (USA). Grand Junction Operations
• DOE Contract Number: AC13-76GJ01664
• OSTI ID: 6209955
• Report Number(s): GJQ-011-81; ON: DE81028162; TRN: 81-014905
• Resource Relation: Other Information: Includes 9 sheets of 24 reduction microfiche
• Country of Publication: United States
• Language: English

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