Butte Valley District

Region West, Southwest
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Outline of an area around an aeromagnetic anomaly on the reduced-to-pole aeromagnetic map of Nevada (Kucks and others, 2006), extended on the west to include the point location for the Butte Valley porphyry copper deposit (Singer and others, 2008).
Identified resources None.
Production None.
Status Active exploration.
Estimated resources Unknown.
Geologic maps Rowley and others (2017), scale 1:250,000.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Alteration and hypogene and supergene copper mineralization is hosted in a buried felsic intrusion, known only from drill core.
Deposits None.
Evidence from mineral occurrences Tingley and Bentz (1983).
Geochemical evidence Alunite, chalcopyrite, goethite, hematite, magnetite, jarosite, kaolinite, molybdenite, and pyrite are reported in Singer and others (2008).
Geophysical evidence Butte Valley porphyry (under cover) was discovered by drilling a large magnetic anomaly.
Evidence from other sources Unknown.
Comments The sulfide system, which covers an area of at least two square miles, is totally blind and is buried below approximately 2,000 feet of gravels and a gravity slide block (Tingley and Bentz, 1983); 17 holes drilled in 1980s. There are multiple potential targets, include skarn.
Cover thickness and description Buried beneath 2,000 feet gravels and gravity slide block.
Authors Peter G. Vikre, Jane M. Hammarstrom.
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 Buried resources; not needed.