From introduction: This report describes work done in the Denver and Greeley National Topographic Map Series (NTMS) quadrangles (1:250 000 scale) by the Los Alamos Scientific Laboratory (LASL) as part of the nationwide Hydrogeochemical and Stream Sediment Reconnaissance (HSSR).

From introduction: The Geology Department of the University of Wyoming was asked to make a geostatistical assessment of the uranium endowment of these deposits as a part of the World Class core drilling operations of the Bendix Field Engineering Corporation. This study was to include (a) the development of optimum geostatistical methodology for assessing uranium endowment in areas of close drill control (1 mile or less centers) as well as in areas of distant drill control (5 mile centers or more), (.b) the implementation of this methodology in assessing the uranium resources of the pebble conglomerates in southeastern Wyoming, and (c) the determination of the overall geostatistical uncertainty of the resource estimates. In addition, methods were to be studied for projecting the assessments into new areas, including prediction of estimate uncertainty.

This report is a preliminary evaluation of the uranium resources of the Brushy Basin Member of the Morrison Formation of Late Jurassic age in southwestern Colorado and southeastern Utah. The project, which began July 1, 1976, and was completed October 1, 1976, was carried out by the Bendix Field Engineering Corporation (BFEC) for the Grand Junction Office of the U.S. Energy Research and Development Administration (ERDA).

Supplementary data containing locations of uranium deposits in the Brushy Basin project area, Utah and Colorado.

From abstract: This report presents preliminary results of stream sediment and ground water reconnaissance in the Greenville National Topographic Map Series (NTMS) 10 x 20 quadrangle. Stream sediment samples were collected from small streams at 1413 sites for a nominal density of one site per 13 square kilometers (five square miles) in rural areas. Ground water samples were collected at 731 sites for a nominal density of one site per 25 square kilometers (ten square miles).

Supplementary data containing geology reports, stream and ground water site location data in addition to areal distribution data to accompany a report on hydrogeochemical and stream sediment reconnaissance.

Final report documenting a high-sensitivity airborne gamma radiation and magnetic field survey of the Lovelock National Topographic Map segment (NK 11-10 quadrangle) including a description of the program and results.

Final report documenting a high-sensitivity airborne gamma radiation and magnetic field survey of the Walker Lake National Topographic Map segment (NJ 11-4 quadrangle) including a description of the program and results.

From introduction: The purpose of this report is to make available to the public the results of a hydrogeochemical survey for uranium in the stream and lake waters and sediments of the Susitna River basin, Alaska. This work was done by the Los Alamos Scientific Laboratory (LASL) for the US Energy Research and Development Administration (ERDA) as part of the National Uranium Resource Evaluation (NURE) program.

Supplementary data containing geophysical logs to accompany an engineering report on the McDermitt Caladera Drilling Project in Nevada and Oregon.

Introduction: This report presents engineering details, statistics, individual borehole histories, and geophysical logs of the eleven holes drilled in the McDermitt caldera project during the 1981 drilling program. General information is presented regarding specific problems, including weather and logistics. A separate geologic report is being prepared and will be available through the Bendix Field Engineering Corporation Technical Library in the near future.

Final report documenting a high-sensitivity airborne radiometric and magnetic survey of the Williamsport quadrangle including the survey description, specifications, data processing methods, interpretation methods, and regional geologic review.

Second volume of a report documenting a high-sensitivity airborne radiometric and magnetic survey of the Williamsport quadrangle including maps documenting geophysical and geochemical data, as well as magnetic, ancillary and radiometric data.

From summary: The University of Colorado, under contract with the Los Alamos Scientific Laboratory (LASL), is currently performing an evaluation of geochemical relationships of water and sediments and seasonal variations to uranium for the South Platte drainage of northeastern Colorado. As a preliminary part of this study, samples were collected from 125 sites near Sterling and Fort Morgan, Colorado, during the period from December 20, 1976, to January 15, 1977. During this period the weather in the area was clear to partly cloudy, with daytime temperatures ranging from -12 to 12 C. Only a trace of precipitation, in the form of very light snow flurries, occurred during the sampling period. The sample site locations and numbers (the first two digits have been omitted) are shown on Plate I.

Data collected as part of a report on the Greenville area including laboratory data on well water, stream water, and stream sediments as well as field data.

Data collected as part of the Winston-Salem NTMS area including laboratory data on well, spring, and stream waters and stream sediments as well as field data.

From abstract: This report presents preliminary results of ground water reconnaissance in the Winston-Salem National Topographic Map Series (NTMS) 1° x 2° quadrangle. This report is issued as a supplement to SRL Document DPST-77-146-1, GJBX-66(77), which contained a geologic description of the area and analytical results for stream sediment samples.

Supplementary field and analytical data to accompany a report on hydrogeochemical and stream sediment reconnaissance in North Carolina, Virginia, and Tennessee.

Report describing the results of an orientation study to determine uranium concentrations within the Artillery Peak and Prescott quadrangles in Arizona. It includes concentrations of uranium and 25 other elements based on analysis of wet, dry, and rock samples taken in the area.

Supplementary data containing sediment analyses of sediment samples for uranium and thorium concentrations in the Artillery Peak Quadrangle to accompany a report on U.S. uranium resources in Mohave County, Arizona.

From summary: This report describes work done in the Douglas, Silver City, Clifton, and Saint Johns, New Mexico/Arizona, National Topographic Map Series (NTMS) quadrangles (1:250 000 scale) by the Los Alamos Scientific Laboratory (LASL) as part of the nationwide Hydrogeochemical and Stream Sediment Reconnaissance (HSSR).

From objectives: The principal objective of this work is to determine those areas that are favorable for concealed uranium deposits beneath the Challis Volcanic rocks in the area north of the Stanley Basin and south of the West Fork of Yankee Fork.

Appendices containing supplementary geological data of the Basin Creek-Yankee Fork area, including radioactivity measurements, locations of geochemical samples, and locations of paleomagnetic measurements to accompany a report on U.S. uranium resources in Custer County, Idaho.

From abstract: Results of an ERDA-sponsored, high-sensitivity, airborne gamma-ray spectrometer and magnetometer survey of a portion of the Delta, Utah, NTMS, 1:250,000 scale quadrangle, carried out under Bendix Field Engineering Corporation Subcontract 76-019-L are discussed. The objective of the survey was to evaluate the Delta area as a uraniferous province, i.e., a region showing surface indications of a generally higher uranium content, and evidence of geochemical uranium enrichment over the other natural radioactive elements, where detailed exploration for uranium would likely be successful. The known presence of late stage Tertiary rhyolites and granites associated with fluorite and uranium occurrences and one productive uranium mine strongly suggested that the area is such a uraniferous province. A DC-3 aircraft equipped with a gamma-ray spectrometer using nine large-volume NaI detectors, two 400 channel analyzers, and ancillary geophysical and electronic equipment was employed for data collection.