Mine detail: Boulder Mine

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Location

Lat / long:

46.27879, -112.28921

Resource(M)

Primary:	Silver, Zinc, Gold
Secondary:	Lead, Copper
Ore:	Chalcopyrite, Galena, Gold, Malachite, Sphalerite
Gangue:	Limonite, Pyrite, Quartz

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1881

Geology

Host type:	Quartz Monzonite
Associated rock:	Lowland Creek Volcanics (Boulder Batholith);Butte Quartz Monzonite
Associated type:	Quartz Monzonite,Latite
Structure:	Fault Zone Trends N75w, Dips 70-85 S
Alteration processes:	Oxidized (Oxidation Of Sulfide Minerals)

References

MRDS	DB02159
DEP	10015884
Reference	{Deposit:: MBMG BULL 16, P. 22, 24, 100.}{Deposit:: USGS BULL 1151, P. 100, PL. 1.}{Deposit:: MBMG BULL 33, P. 13}{Production:: MBMG BULL 16, USGS BULL 1151.}
Reporter	Elliott, James E., Wise, Kristine K. (Elliott, James E.)