Lake Bonneville Beach Gravels

Region West, Southwest
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area The focus area is based on a description of the deposit in Krahulec (2011a) describing Pleistocene Glacial Lake Bonneville beach gravels on the east flank of the Ibapah batholith in Snake Valley about 3000 ft wide by 40,000 ft long. A buffer of roughly 5 km was added due to lack of exploration in the area.
Identified resources None.
Production None.
Status Active exploration.
Estimated resources 130 million cubic yards or 225 million short tons of heavy mineral concentrates (Krahulec 2011b).
Geologic maps Hintze (1980), scale 1:500,000.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures The beach placer occurs in Lake Bonneville terrace deposits between elevations of approximately 5200 ft and 5040 ft. (Krahulec, 2011b).
Deposits Unknown.
Evidence from mineral occurrences UMOS (Utah Geological Survey, 2021).
Geochemical evidence In addition to low levels of U, Th, Ti, and Zr, these beach placer concentrates also have elevated Nb and REE, including Ce, La, Y, and Yb (Cadigan and others, 1979). Great Western Minerals Group Ltd. acquired this area as a REE property in 2008 and report grades up to 0.8% TREO plus high Fe contents for select surface samples; however, grades average closer to 0.1% TREO. (Krahulec 2011b).
Geophysical evidence None.
Evidence from other sources Krahulec (2011b).
Cover thickness and description Exposed.
Authors Stephanie Mills.
New data needs None requested at this time.
Geologic mapping and modeling needs None requested at this time.
Geophysical survey and modeling needs None requested at this time.
Digital elevation data needs Lidar inadequate.