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Subsurface Stratigraphy and Uranium-Vanadium Favorability of the Morrison Formation, Sage Plain Area, Southeastern Utah and Southwestern Colorado

Description: Introduction: This report presents the results of a subsurface uranium favorability study of the Morrison Formation in southwestern Colorado and southeastern Utah. The project began November 1, 1974 and was concluded April 11, 1975. The study was carried out under the auspices of the Grand Junction Office of the Energy and Research Development Administration (ERDA).
Date: August 1975
Creator: Girdley, W. A.; Flook, J. E. & Harris, R. E.

National Uranium Resource Evaluation: Lamar Quadrangle, Colorado and Kansas

Description: Abstract: Uranium resources of the Lamar Quadrangle, Colorado and Kansas, were evaluated using National Uranium Resource Evaluation criteria. The environment favorable for uranium is the Lower Cretaceous Dakota Sandstone in the area east of John Martin Reservoir for south Texas roll-type sandstone deposits. Carbonaceous trash and sulfides are abundant in the Dakota Sandstone. The unit underlies a thick Upper Cretaceous section that contains bentonitic beds and uraniferous marine black shale. Water samples from the Dakota Sandstone aquifer contain as much as 122 parts per billion Uranium-3 Oxygen-8. Geologic units considered unfavorable include most of the Paleozoic rocks, except in the Brandon Fault area; the Upper Cretaceous rocks; and the Ogallala Formation. The Dockum Group, Morrison Formation, and Lytle Member of the Purgatoire Formation are unevaluated because of lack of data.
Date: January 1982
Creator: Maarouf, Abdelrahman M. S. & Johnson, V. C.

Aztec Quadrangle, New Mexico and Colorado

Description: From purpose and scope: The purpose of the National Uranium Resource Evaluation (NURE) program of the U.S. Department of Energy (DOE) is to identify and delineate areas and environments within the Aztec 10X20 Quadrangle, New Mexico and Colorado, that exhibit characteristics favorable for the occurrence of uranium deposits that have the potential to contain at least 100 metric tons U3 08 total endowment with a minimum grade of 100 ppm (0.01 percent) U3 08 . Evaluation is based on geochemical, mineralogic, hydrologic, aerial radiometric, sedimentologic, and general geologic characteristics of the formations in the quadrangle.
Date: September 1982
Creator: Green, Morris W.; Byers, Virginia P.; Condon, Steven M.; Huffman, A. Curtis, Jr.; Dubiel, Russell F.; Kirk, Allan R. et al.

Raton Quadrangle, New Mexico and Colorado

Description: From Purpose and Scope: "The Raton Quadrangle, New Mexico and Colorado (Fig. 1), was evaluated to identify geologic units and delineate areas that exhibit characteristics favorable for uranium deposits. All geologic environments exposed at the surface were considered. In the subsurface, all geologic environments to a depth of 1500 m were considered using either projection of findings for outcrops or subsurface information from borings."
Date: unknown
Creator: Reid, Bruce E.; Griswold, George B.; Jacobsen, Lynn C. & Lessard, Robert H.
Location Info:

National Uranium Resource Evaluation: Durango Quadrangle, Colorado

Description: From purpose and study: The Durango Quadrangle, southwest Colorado (Fig. 1), was evaluated to identify geologic units and to delineate areas that exhibit characteristics favorable for uranium deposits. Geologic environments were evaluated to a depth of 1500 m based on recognition criteria (Mickle and Mathews, eds., 1978) prepared for the National Uranium Resource Evaluation (NURE) program. A favorable environment, as defined for this program, is an environment that could contain at least 100 tons U308 in deposits with an average grade no less than 100 ppm U308 . Environments that did not meet the NURE criteria were categorized as unfavorable. Some of the subsurface and several areas of restricted access were categorized as unevaluated because insufficient data exist for proper evaluation.
Date: June 1981
Creator: Theis, Nicholas J.; Madson, Michael E.; Rosenlund, Gene C.; Reinhart, William R. & Gardner, Hal A.

National Uranium Resource Evaluation: La Junta Quadrangle, Colorado and Kansas

Description: From Introduction: "The La Junta Quadrangle, Colorado and Kansas (Fig. 1), was evaluated to identify and delineate areas and geologic units to a depth of 1500 m (5,000 ft) that exhibit characteristics favorable for the occurrence of uranium deposits, which could contain at least 100 tons U3O8 and have an average grade of not less than 100 ppm U3O8."
Date: September 1982
Creator: McCarn, Dan W.; Johnson, V. C. & Theis, Nicholas J.
Location Info:

National Uranium Resource Evaluation: Cortez Quadrangle, Colorado and Utah

Description: From Introduction: "The Cortez 1º x 2º Quadrangle, southwestern Colorado and southeastern Utah (Fig. 1), was studied to identify and evaluate areas and geologic formations that are favorable for the occurrence of uranium deposits of specific minimum size and grade."
Date: September 1982
Creator: Campbell, John A.; Franczyk, Karen J.; Lupa, Robert D. & Peterson, Fred
Location Info:

Aerial Gamma Ray and Magnetic Survey, Final Report. Volume 1: Rock Springs, Rawlins, and Cheyenne Quadrangles (Wyoming), and the Greeley Quadrangle (Colorado)

Description: The data collected in this report was recorded after a high sensitivity airborne radiometric and magnetic survey was conducted over the Rock Springs, Rawlins, and Cheyenne quadrangles in Wyoming, and the Greeley quadrangle in Colorado.
Date: December 1978
Creator: Geometrics, Inc.
Location Info:

National Uranium Resource Evaluation: Vernal Quadrangle, Colorado and Utah

Description: From Purpose and Scope of Study: "The purpose of this study is to provide an evaluation of the favorability of the Vernal, Colorado-Utah, 1º x 2º Quadrangle (Fig. 1) for the occurrence of uranium deposits. The study restricted to indicating geologic units and areas favorable for uranium deposits containing at least 100 tons of U3O8 with an average grade of .01 percent U3O8 or more and less than 1,500m (5,000 ft) deep."
Date: September 1982
Creator: Craig, Lawrence C.; Hail, William J., Jr. & Luft, Stanley Jeremie
Location Info:

National Uranium Resource Evaluation: Pueblo Quadrangle, Colorado

Description: From Introduction: "The Front Range region from the Wyoming-Colorado state line to southern Colorado is a uranium metallogenic province. Correspondingly, uranium has been discovered in mineable deposits in metamorphic, igneous, and sedimentary rocks formed throughout the geologic history of the region both within the Front Range itself and in the apron of sedimentary rocks that surrounds the Front Range. The Pueblo 1ºx2º National Topographic Map Series (NTMS) quadrangle, Colorado (Fig. 1), which lies within this uranium metallogenic providence, was evaluated to identify and delineate areas and geologic units that exhibit characteristics favorable for the occurrence of uranium deposits."
Date: September 1982
Creator: Dickinson, Kendell A. & Hills, Francis Allan
Location Info:

National Uranium Resource Evaluation: Leadville Quadrangle, Colorado, Appendix A-K

Description: Appendices containing supplementary analytical data of uranium occurrences, chemical analyses of stream-sediment, rock, and soil samples, and tabulated radiometric and gamma-ray anomaly data to accompany a report on U.S uranium resources in the Leadville Quadrangle, Colorado.
Date: July 1982
Creator: Collins, Donna Bishop; Graham, Donald C. & Hornbaker, A. L.
Location Info:

National Uranium Resource Evaluation: Leadville Quadrangle, Colorado

Description: From Introduction: "The Leadville Quadrangle, Colorado (Fig. 1), was evaluated to identify and delineate areas and geologic units that exhibit characteristics favorable for the occurrence of uranium deposits. Geologic environments were placed into one of three categories--favorable, unfavorable, or unevaluated--based on National Uranium Resource Evaluation (NURE) program."
Date: July 1982
Creator: Collins, Donna Bishop; Graham, Donald C. & Hornbaker, A. L.
Location Info: