This report provides results from a preliminary study to determine rock types and alteration products that are responsible for an observed abundance of radioactive gas at the Trinity Gold Mine in Utah. It includes an overview of the study and the location, description of the methods and general statements, details about the structure, petrography and mineralogy, and a discussion of findings.

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.

Second volume of a report on aerial gamma-ray and magnetic survey of the Delta area of Utah, containing illustrations such as histograms, anomaly maps at a reduced scale of 1:500,000, and magnetic profiles related to the survey.

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).

From approach: This survey consisted of aerial gamma-ray spectrometer and magnet-meter data collection including: (1) Coverage of those portions of the Delta, Utah NTMS 1:250,000 scale quadrangle (Figure 1-1) which were not surveyed in 1976 under Bendix Field Engineering Corporation subcontract No. 76-019-L, Texas Instruments (1977a). (2) Reflights of portions of the 1976 flight lines which were out of altitude specifications. (3) Extra flight lines over the 1976 survey area to provide complete detailed coverage of the NW quarter of the quadrangle. The program also included processing and interpretation of the gamma-ray spectrometer data necessary to indicate potential new uranium prospecting areas.

This is an aerial reconnaissance survey report of the Delta Quadrangle in Utah.

From introduction: This report presents the results of a preliminary study of uranium occurrences in the beryllium belt of Juab County, Utah. The study was conducted by Bendix Field Engineering Corporation (BFEC) for the U.S. Energy Research and Development Administration (ERDA) to aid in estimating the uranium potential of the area.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Price quadrangle in Utah.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Tooele quadrangle in Utah.

This report provides uranium and other elemental data resulting from the Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) of the Cortez quadrangle, Colorado/Utah.

This report presents preliminary results of ground water, stream sediment, and stream water studies in the Delta and Richfield quadrangles in Utah.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Brigham City quadrangle in Utah.

Supplementary data containing a geologic plan of the Trinity Gold Mine to accompany a report on the Trinity Mines in Marysvale, Utah.

Supplementary data containing geologic and sample site maps of Juab County to accompany a report on U.S. uranium resources in Utah.

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

This is the first volume of a two-part report on the analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the Price National Topographic Map NJ-12-2. This volume gives the description of the program and results

This is the second volume of a two-part report on the analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the Price National Topographic Map NJ-12-2. This volume presents the flight line profile data and statistical analysis results.

This is the first volume of a two-part report on the analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the Tooele National Topographic Map NK-12-10. This volume gives the description of the program and results.

This is the second volume of a two-part report on the analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the Tooele National Topographic Map NL-12-10. This volume presents the flight line profile data and statistical analysis results.

This is the first volume of a two-part report on the analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the Brigham City National Topographic Map NK-12-7. This volume gives the description of the program and results.

This is the second volume of a two-part report on the analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the Brigham City National Topographic Map NK-12-7. This volume presents the flight line profile data and statistical analysis results.

Appendix containing single-record and averaged record data listings to accompany a report on aerial radiometric and magnetic survey of the Delta area in Utah.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Price quadrangle in Utah.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Tooele quadrangle in Utah.