Mine detail: Gray Eagle Mine

Previously called ''

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Location

Lat / long:

46.31323, -112.19977

Resource(M)

Primary:	Silver, Lead, Copper, Zinc
Secondary:	Gold
Tertiary:	Uranium, Molybdenum, Antimony, Arsenic
Ore:	Chalcopyrite, Galena, Gold, Molybdenite, Sphalerite, Tetrahedrite
Gangue:	Ankerite, Pyrite, Quartz
Orebody form:	SHOOTS
Discovery year:	1891

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1902

Geology

Host type:	Welded Tuff
Associated rock:	Boulder Batholith, Butte Quartz Monzonite;Elkhorn Mountains Volcanics
Associated type:	Quartz Monzonite,Welded Tuff
Structure:	Boulder Batholith, South-Trending Syncline In Elkhorn Mountains Volcanics, Comet - Gray Eagle Shear Zone, Roof Pendant Of Elkhorn Mountains Volcanics
Tectonic:	Cordilleran Miogeosyncline
Alteration processes:	Sericitization And Intense Alteration Of Quartz Monzonite

References

MRDS	W014710
DEP	10071368
Reference	{Deposit:: MBMG BULL-16, P. 29-30}{Deposit:: USGS BULL 527, P. 121}{Deposit:: USGS BULL 842, P. 287-89.}{Deposit:: USGS PP 428, P. 40, 42, 53, 54, 84, 86.}{Deposit:: MBMG BULL 7.}{Deposit:: MBMG BULL 10, P. 25}{Production:: MBMG BULL 16, P. 30}
Reporter	Mlynarczyk, Meg S., Wise, Kristine K. (Elliott, James E.)