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Favorability for Uranium in Tertiary Sedimentary Rocks, Southwestern Montana

Description: The objective of the study was to evaluate the favorability for potential uranium resources in Tertiary and related strata. Past studies indicate that the Tertiary basins in southwestern Montana are worthy of further investigation because (1) several basins contain a thick sequence of continental sedimentary rocks, (2) several basins are near possible granitic source rocks that have known uranium occurrences, and (3) some of the Montana basins are geologically similar to basins in Wyoming that are host to important sandstone-type deposits. This study focuses on sedimentary rocks of Tertiary age, but includes some rocks of Late Cretaceous and Pleistocene ages. In some areas only a portion of the total Tertiary sedimentary section could be studied because of poor surface exposures and limited subsurface information.
Date: October 1977
Creator: Wopat, Michael Allen; Curry, William E.; Robins, Jerold W. & Marjaniemi, Darwin Keith

Preliminary Evaluation of the Uranium Favorability in the Area Northeast of Gunnison, Colorado

Description: Rock and stream-sediment samples were collected to define areas favorable for uranium deposits northeast of Gunnison, Colorado. Areas considered most favorable for further exploration are: (1) the Bronco Mountain area, approximately 10 mi south of Taylor Park Reservoir, (2) the area near the Big Red mine, and (3) the area 5 mi north-northeast of Taylor Park Reservoir. On the basis of known deposits in the Marshall Pass and Cochetopa districts, fault contacts between Precambrian granites and Paleozoic or Mesozoic sedimentary rocks are favorable structural sites.
Date: August 1977
Creator: Gallagher, Gerald L.; Edmond, C. Lorraine & D'Andrea, Ralph F., Jr.

Uranium Favorability of Southwestern Oklahoma and North-Central Texas

Description: The objective of this project was to identify and delineated units and (or) facies that are favorable for uranium in the Upper Pennsylvanian and Lower Permian strata of north-central Texas and southwestern Oklahoma. Mapping of depositional systems in the subsurface was the main emphasis of the study.
Date: October 1977
Creator: Stanton, G. D.; Brogdon, L. D.; Quick, J. V.; Thomas, N. G. & Martin, T. S.

Preliminary Study of the Uranium Potential of Tertiary Rock in the Central San Juan Basin, New Mexico

Description: Three formations in the Tertiary of the San Juan Basin were investigated for their uranium favorability. They are the Ojo Alamo Sandstone, the Nacimiento Formation, and the San Jose Formation. The study comprised a literature survey and a basin analysis, which consisted of subsurface lithofacies, stratigraphic, and radiometric mapping. Field work in preparation for the subsurface analysis consisted of examination of outcrop and measured sections, surface radiometric traverses, and checking of reported surface radioactive anomalies.
Date: December 1977
Creator: Vizcaino, H. P. & O'Neill, A. J.

Uranium Concentrations in Stream Waters and Sediments from Selected Sites in the Eastern Seward Peninsula, Koyukuk, and Charley River Areas, and Across South-Central Alaska

Description: During the summer of 1975, the Alaska Division of Geological and Geophysical Surveys (DGGS) conducted a 6-week reconnaissance in widespread areas of Alaska as part of the National Uranium Resource Evaluation (NURE) program sponsored by the Department of Energy (DOE). Water, stream sediment, and bedrock samples were taken from the eastern Seward Peninsula, from north of Koyukuk River, from the Charley River area, and from across south-central Alaska, to aid in determining the uranium potential of the state.
Date: April 1978
Creator: Sharp, Robert R., Jr. & Hill, Dwight E.

Uranium Hydrogeochemical and Stream Sediment Pilot Survey of the Estancia Valley, Bernalillo, Santa Fe, San Miguel, and Torrance Counties, New Mexico: Part 1. Text and Data Listings

Description: As part of the LASL portion of the US EROA NURE program, water samples from 534 locations and sediment samples from 2936 locations were taken over a 7770 square kilometers area of the Estancia Valley in 1975 and analyzed for uranium.
Date: January 1977
Creator: Olsen, Clayton Edward

Uranium Hydrogeochemical and Stream Sediment Reconnaissance in the San Juan Mountains, Southwest Colorado

Description: From 1995 sites in the San Juan Mountains area, 1706 water and 1982 sediment samples were collected during June-July 1976 and analyzed for uranium. The area includes the southern third of the Colorado mineral belt which has yielded rich ores of gold, silver, copper, lead, zinc, and molybdenum. The broadly domed mountains are capped by 2500 m of Tertiary volcanics, deeply eroded to expose a Precambrian crystalline core. Adjacent plateaus underlain by Mesozoic sedimentary rocks were included in the reconnaissance. Average value of uranium in water samples from mountains was less than 0.5 parts per billion, from plateaus was 1-2 parts per billion, from Mancos shale areas exceeded 2 parts per billion. Anomalous sediment samples, 40 ppm uranium, came from near Storm King Mountain and upper Vallecito Creek. Other anomalous areas, including the Lake City mining district, were well defined by 4-30 parts per million uranium in sediment and 3-30 parts per billion uranium in water. Anomalous areas not previously reported indicate favorable areas for future exploration.
Date: February 1977
Creator: Maxwell, James C.

Uranium Hydrogeochemical and Stream Sediment Reconnaissance in Lincoln and Flathead Counties, Northwest Montana

Description: From abstract: Between mid-May and late June 1976, 3409 water and water-transported sediment samples were collected from 1781 locations spread over an approximate 17 000 kilometer area of northwestern Montana. All of the samples were analyzed for total uranium at the LASL, using standardized procedures and rigorous quality controls--the waters by fluorometry and the sediment (and those waters with >10 parts per billion uranium) by delayed-neutron counting methods.
Date: May 1977
Creator: Aamodt, Paul L.

Preliminary Study of Favorability for Uranium of the Sangre de Cristo Formation in the Las Vegas Basin, Northeastern New Mexico

Description: This report presents the results of a preliminary study of the uranium favorability of the Sangre de Cristo Formation (Pennsylvanian-Permian) in the Las Vegas basin, northeastern New Mexico. Because known uranium deposits are confined mainly to the Sangre de Cristo, the following discussions are limited to this formation. The study focuses on sedimentologic and stratigraphic characteristics relevant to uranium deposition. The investigation was conducted by Bendix Field Engineering Corporation (BFEC) on behalf of the U.S. Energy Research and Development Administration (ERDA).
Date: December 1977
Creator: May, R. T.; Strand, J. R.; Reid, R. E. & Phillips, W. R.

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.

Potential Uranium Host Rocks and Structures in the Central Great Plains

Description: From introduction: This report covers the results of an ERDA-sponsored study to provide a preliminary evaluation of the uranium potential of the central portion of the Great Plains. It was carried out by the University of Kansas under contract number AT (05-1)-1642. This work is part of the ERDA National Uranium Resource Evaluation (NURE) Program. Texas Instruments Incorporated contributed to the study as a subcontractor.
Date: November 15, 1975
Creator: Zeller, Edward Jacob; Dreschhoff, Gisela A. M.; Angino, Ernest E.; Holdoway, Katrine A.; Hakes, W.; Jayaprakash, G. et al.

Hydrogeochemical and Stream-Sediment Survey (NURE): Preliminary Report on the Walker River Basin Study (California/Nevada)

Description: From introduction: The objective of this survey is to develop a geochemical data base for use by the private sector to locate regions of anomalous uranium content. Prior to wide area coverage, several pilot studies are being undertaken to develop and evaluate sampling and analytical techniques. The first of these studies was conducted in the Walker River Basin.
Date: July 1, 1976
Creator: Lawrence Livermore Laboratory

Aerial Radiometric and Magnetic Survey of the Lubbock and Plainview Geologic Atlas Areas of Texas: Volume 1. Summary Report

Description: From introduction: Geodata International, Incorporated, conducted an airborne gamma ray and total magnetic field survey of a region of Northwest Texas which covered the Lubbock and Plainview Geologic Atlas Maps. The area shown on Figure 1 was surveyed from an aircraft using large-volume radiation detectors with computer-controlled airborne equipment. Each map line was flown in an east-west direction with an average length of 120 miles. A total of 47 map lines were surveyed spaced at 3-mile intervals beginning at latitude 33000' and ending at latitude 350
Date: July 31, 1975
Creator: Geodata International

Feasibility Study for an Airborne High-Sensitivity Gamma-Ray Survey of Alaska: Phase 2 (Final) Report -- 1976-1979 Program

Description: "This study constitutes a determination of the extent to which it is feasible to use airborne, high-sensitivity gamma-ray spectrometer systems for uranium reconnaissance in the State of Alaska, and specification of a preliminary plan for surveying the entire state of the 1975-1979 time frame."--Page iii.
Date: 1975
Creator: Texas Instruments Incorporated