National Uranium Resource Evaluation: Vernal Quadrangle, Colorado and Utah

Technical Report · Wed Sep 01 04:00:00 EDT 1982

OSTI ID:6778075

Craig, L C; Hail, Jr, W J; Luft, S J

The Vernal 1/sup 0/ x 2/sup 0/ Quadrangle in northeastern Utah and northwestern Colorado has six areas that are considered favorable for uranium deposits that could contain at least 100 tons U/sub 3/O/sub 8/ at an average grade not less than 100 ppM U/sub 3/O/sub 8/ and less than 1500 m deep. Three of the areas (A, B, and C) are in the Browns Park Formation (Miocene) in the east-central and northeastern part of the quadrangle, and uranium deposits of these areas are classed as nonchannel-controlled, peneconcordant, sandstone-type deposits (Subclass 244) and channel-controlled, peneconcordant, sandstone-type (Subclass 243). Area D, a large area in the southeastern part of the Vernal Quadrangle, is underlain by the favorable Mesaverde Group (Upper Cretaceous). Uranium deposits are peneconcordant, both channel-controlled and nonchannel-controlled sandstone-type deposits (Subclasses 243 and 244). Area E, in the southwestern part of the Vernal Quadrangle, is in the Uinta Formation (Eocene) and contains peneconcordant, both channel-controlled and nonchannel-controlled sandstone-type uranium deposits (Subclasses 243 and 244). Area F, in the southeastern part of the Vernal quadrangle, is in the upper part of the Fort Union Formation (Paleocene), and uranium deposits are classed as uraniferous lignite (Class 210). Here the upper part of the Fort Union is paludal and contains carbonaceous beds that provided a reducing medium for concentrating uranium.

• Research Organization: Geological Survey, Golden, CO (USA)
• DOE Contract Number: AI13-78GJ01686
• OSTI ID: 6778075
• Report Number(s): PGJ/F-026-82; ON: DE83000766
• Country of Publication: United States
• Language: English

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