Mine detail: Comet Mine

Previously called ''

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Location

Lat / long:

46.30962, -112.16755

Resource(M)

Primary:	Gold, Silver, Lead
Secondary:	Zinc, Copper
Tertiary:	Uranium, Arsenic, Antimony
Ore:	Chalcopyrite, Galena, Gold, Sphalerite, Tetrahedrite, Arsenopyrite
Gangue:	Pyrite, Quartz, Tourmaline
Orebody form:	SHOOTS; LENTICULAR
Discovery year:	1874

Production

Operation type:	Unknown
Deposit type:	Polymetallic veins
Production size:	Small
Development status:	Past Producer
First production started:	1880

Geology

Host rock:	BOULDER BATHOLITH
Host type:	Quartz Monzonite,Alkali-Granite (Alaskite)
Associated rock:	Quartz Latite Dike(Boulder Batholith);Boulder Batholith, Butte Quartz Monzonite;Elkhorn Mountains Volcanics
Associated type:	Quartz Monzonite,Welded Tuff,Quartz Latite
Structure:	Boulder 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:	Cordilleran Miogeosyncline
Alteration processes:	Most Rocks In Shear Zone Altered To Sericite And Clay Minerals. It Is Also Tourmalinized, Many Well-Developed Radial Groups Of Tourmaline. Oxidation Also Occurs.

References

MRDS	W014654
DEP	10105714
Reference	{Deposit:: MBMG BULL 16, P. 26, 27.}{Deposit:: USGS BULL 527, P. 114-15.}{Deposit:: USGS BULL 842, P. 243-4}{Deposit:: USGS PP 428, P. 28, 36, 40, 49, 53, 84.}{Production:: MBMG BULL. 16, USGS PROF. PAPER 428}
Reporter	Krohn, Douglas H., Wise, Kristine K. (Elliott, James E.)