Mine detail: Valley Forge Mine

Previously called ''

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Location

Lat / long:

46.49157, -112.24117

Resource(M)

Primary:	Silver, Lead, Gold
Secondary:	Zinc, Copper
Tertiary:	Arsenic
Ore:	Chalcopyrite, Galena, Gold, Sphalerite
Gangue:	Pyrite, Quartz, Tourmaline

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1885

Geology

Host type:	Quartz Monzonite
Associated rock:	Butte Quartz Monzonite (Boulder Batholith)
Associated type:	Quartz Monzonite
Structure:	Boulder Batholith, Lee Mountain-Valley Forge Shear Zone
Alteration processes:	Sericitization

References

MRDS	DB02093
DEP	10015839
Reference	{Deposit:: USGS BULL 527, P. 82-3.}{Deposit:: USGS BULL 842, P. 257-58.}{Deposit:: USGS PP 428, P. 55, PL. 1.}{Production:: USGS PP 428, P. 55; USGS BULL 842, P. 257.}
Reporter	Elliott, James E., Wise, Kristine K. (Elliott, James E.)