Toiyabe Peaks

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 the mineralized contact between Cretaceous intrusive rock and Precambrian to Devonian metasedimentary rocks, and encompasses multiple U showings along this contact (Jensen and Herrmann, 2012). The Apex and Rundberg mines along this contact produced a small amount of Ag and U, and was extensively explored by Exxon and Uranerz.
Identified resources Historical production of uranium.
Production North Toiyabe Range AEC ore production area was about 114,000 lbs U3O8 from 1954 to 1964 (Pool, 2017).
Status Past mining.
Estimated resources Unknown.
Geologic maps Stewart and Carlson (1978), scale 1:500,000; Stewart and McKee (1968), scale 1:65,500.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Contact between Cretaceous intrusive rock (Austin pluton) and metasedimentary rocks (Veatch quartzite).
Deposits Rundberg (Apex) mine (MRDS dep_id: 10104008), Lowboy mine (MRDS dep_id: 10246840), Lowary mine (MRDS dep_id: 10043816), Red Bluff (Austin) (MRDS dep_id: 10043820), Diamond, Klarunde Lease, Tick Canyon Group (MRDS dep_id: 10103925).
Evidence from mineral occurrences MRDS; International Atomic Energy Agency (2020b); U.S. Environmental Protection Agency (2006).
Geochemical evidence No data.
Geophysical evidence Unknown.
Evidence from other sources Historical exploration by Exxon and Uranerz, more recent exploration (circa 2009) by Monaro Mining NL.
Cover thickness and description Known mineralization between 20 and 75 m below the surface.
Authors Susan Hall.
New data needs Geologic mapping, geophysics, geochemistry.
Geologic mapping and modeling needs Updated geologic mapping.
Geophysical survey and modeling needs High-resolution, Rank 1 aeromagnetic and aeroradiometric surveys.
Digital elevation data needs Lidar inadequate.