Region West, Northwest
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Outline of the Cretaceous Fawn Peak stock and surrounding volcanic rocks, which includes the Mazama porphyry copper system and associated copper and gold prospects and occurrences.
Identified resources Historical production of copper, gold, and silver.
Production American Flag breccia pipe produced a few hundred tons before 1910, with limited production in 1940 (Huntting, 1956).
Status Past mining. Porphyry exploration 1960 to 1990; 2016 exploration by Blue River Resources Ltd.
Estimated resources In 1991 potential reserve estimate 454 Mt at 0.4% Cu and 0.34 g/t Au.
Geologic maps Todd (1995), scale 1:62,500.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Breccia pipes associated with multiphase porphyry copper system.
Deposits American Flag breccia pipe (MRDS dep_id: 10055965).
Evidence from mineral occurrences MRDS; Singer and others (2008).
Geochemical evidence Unknown.
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Exposed.
Authors Jane M. Hammarstrom.
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.