Southern Nevada Tungsten

Region West, Southwest
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Tem Piute, Oak Spring, and Shoshone Mining Districts.
Identified resources Historical production of tungsten.
Production Emerson mine (1938-1982): 50,0000 short tons units WO3 (Stager and Tingley, 1988); Scheelite Chief mine (1916-1956): 107,830 short tons units WO3 (Stager and Tingley, 1988).
Status Past mining.
Estimated resources Unknown.
Geologic maps Horton and others (2017), scale 1:500,000; Wyant and Lemmon (1951), scale 1:12,150; Miller, Brown and others (1993), scale 1:24,000; Barnes and others (1963), scale 1:24,000; Rogers and Noble (1969), scale 1:24,000.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Granite stocks cut limestone resulting in thick bodies of tactite in bands parallel to bedding; the bulk of the scheelite occurs in garnet-tactite, but some rich deposits are in small masses of calcite-fluorite-sphalerite rocks formed in marble remnants in adjoining tactite bodies (Wyant and Lemmon, 1951). Skarns in the Oak Springs district are associated with the Twinridge pluton and Cretaceous Climax stock.
Deposits Schofield mine (North Tem Piute mine) (MRDS dep_id: 10107653), Koyen scheelite mine (MRDS dep_id: 10222267), Emerson mine (MRDS dep_id: 10149742; USMIN Site_ID: NV00119), Shoshone mining district ( USMIN Site_ID: NV00136).
Evidence from mineral occurrences MRDS; USMIN.
Geochemical evidence Minerals in tactite are garnet, quartz, actinolite, calcite, fluorite, pyrite, pyrrhotite, diopside, sphalerite, scheelite, chlorite, hematite, clinozoisite, epidote, molybdenite, and powellite (Wyant and Lemmon, 1951).
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Exposed at the surface.
Authors John L. Muntean.
New data needs Geologic mapping, geophysics.
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.