Klamath Mountains orogenic Au

Region West, Southwest
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Map showing location of mining districts and value of gold produced from lode gold mines and prospects in the Klamath Mountains province, California and Oregon from Hotz (1971). Correlation of the Klamath Mountains and Sierra Nevada from Irwin (2003).
Identified resources Historical production of gold.
Production More than 7 Moz gold has been produced from both lode and placer sources in the Klamath Mountains. Approximately 27% of the produced gold has come from gold-bearing quartz veins (Hotz, 1971; Silberman and Danielson, 1991).
Status Past mining, current exploration.
Estimated resources Unknown.
Geologic maps Horton and others (2017), scale 1:500,000.
Geophysical data Mostly inadequate Rank 3, 4, and 5 aeromagnetic coverage, with a small area of Rank 2 aeromagnetic coverage in the south and Rank 5 aeroradiometric coverage throughout.
Favorable rocks and structures Western Klamath terrane, Rattlesnake Creek terrane, Western Hayfork terrane, Eastern Hayfork terrane, Condrey Mountain Schist, North Fork terrane, Stuart Fork terrane, Central Metamorphic terrane, Eastern Klamath terrane, and granitic intrusions hosted within those terranes.
Deposits See Hotz (1971).
Evidence from mineral occurrences MRDS; Clark (1970a); Hotz (1971).
Geochemical evidence Common As-bearing pyrite and arsenopyrite are associated with Au ore. Various telluride minerals can be ore or are associated with gold ore.
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Mineralization may extend from the surface to great depths.
Authors Ryan D. Taylor.
New data needs Updated geologic mapping, lidar, geochemistry, aeromagnetic and aeroradiometric surveys.
Geologic mapping and modeling needs Needs updated geologic mapping.
Geophysical survey and modeling needs High-resolution, Rank 1 aeromagnetic and aeroradiometric surveys.
Digital elevation data needs Lidar inadequate.