Commodities
PrimaryGold, Silver, Lead
SecondaryZinc, Copper
TertiaryUranium, Arsenic, Antimony
Commodity typeM
Deposit
Deposit typePolymetallic veins
Model85: Polymetallic veins
Deposit sizeS
WorkingsSurface/Underground
Orebody formSHOOTS; LENTICULAR
Ore controlComet-Gray Eagle Shear Zone
Materials
Ore mineralsChalcopyrite, Galena, Gold, Sphalerite, Tetrahedrite, Arsenopyrite
GanguePyrite, Quartz, Tourmaline
Geology
Host rockQuartz Monzonite,Alkali-Granite (Alaskite) · BOULDER BATHOLITH
Associated rockQuartz Monzonite,Welded Tuff,Quartz Latite · Quartz Latite Dike(Boulder Batholith);Boulder Batholith, Butte Quartz Monzonite;Elkhorn Mountains Volcanics
StructureBoulder Batholith; South-Trending Syncline In Elkhorn Mountains Volcanics, Comet - Gray Eagle Shear Zone, Veins Offset By Small Cross-Faults, Roof Pendant Of Volcanic Rocks
Tectonic settingCordilleran Miogeosyncline
AlterationMost Rocks In Shear Zone Altered To Sericite And Clay Minerals. It Is Also Tourmalinized, Many Well-Developed Radial Groups Of Tourmaline. Oxidation Also Occurs.
Economic & production
Development statusPast Producer
First production1880
Discovery year1874
Identification
Deposit ID10105714
MRDS IDW014654
RegionNA
Data scoreB
Coordinates46.30962, -112.16755
References
MBMG BULL 16, P. 26, 27.USGS BULL 527, P. 114-15.USGS BULL 842, P. 243-4USGS PP 428, P. 28, 36, 40, 49, 53, 84.MBMG BULL. 16, USGS PROF. PAPER 428