Mine detail: Bertha Mine

Previously called 'Bertha Group'

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Location

Lat / long:

46.38018, -112.0881

Resource(M)

Primary:	Copper, Silver
Secondary:	Lead, Gold, Zinc
Tertiary:	Bismuth, Antimony
Ore:	Bornite, Chalcopyrite, Gold, Tetrahedrite
Gangue:	Pyrite, Quartz
Orebody form:	IRREGULAR

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Last production ended:	1917

Geology

Host type:	Quartz Monzonite
Associated rock:	Butte Quartz Monzonite (Boulder Batholith);Elkhorn Mountain Volcanics
Associated type:	Quartz Monzonite,Andesite
Structure:	Boulder Batholith
Alteration processes:	Sericitization, Oxidation, Some Pyritization

References

MRDS	DB02151
DEP	10101934
Reference	{Deposit:: MBMG BULL 16, P. 47-9.}{Deposit:: USGS BULL 842, P. 242.}{Deposit:: USGS BULL 527 P. 110-11.}{Deposit:: USGS PP 428, P. 78.}
Reporter	Elliott, James E., Wise, Kristine K. (Elliott, James E.)