Mine detail: Blue Bird Mine

Previously called 'Pen Yan Mine'

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Location

Lat / long:

46.35879, -112.16699

Resource(M)

Primary:	Gold, Silver
Secondary:	Lead, Zinc, Copper
Tertiary:	Arsenic, Antimony
Ore:	Bornite, Galena, Gold, Malachite, Sphalerite, Tetrahedrite
Gangue:	Anglesite, Calcite, Pyrite, Quartz, Rhodochrosite, Tourmaline
Orebody form:	IRREGULAR SHOOTS
Discovery year:	1887

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1887
Last production ended:	1957

Geology

Host type:	Quartz Monzonite,Tuff
Associated rock:	Elkhorn Mountain Volcanics;Butte Quartz Monzonite
Associated type:	Quartz Monzonite,Tuff,Quartz Latite
Structure:	Boulder Batholith, South-Trending Syncline In Elkhorn Mountains Volcanics, Bluebird - Mount Washington Shear Zone About 4 Km Long, Roof Pendant Of Elkhorn Mountains Volcanics
Tectonic:	Cordilleran Miogeosyncline
Alteration processes:	Pyritization, Sericitization

References

MRDS	W014656
DEP	10071325
Reference	{Deposit:: MBMG BULL 30, P. 24.}{Deposit:: USGS PP 428, P. 72-73.}{Deposit:: MBMG BULL 16, P. 49.}{Deposit:: MBMG BULL 10, P. 25.}{Deposit:: USGS BULL 527, P. 50-51, 111-14.}{Deposit:: USGS BULL 842, P. 242-43.}{Production:: MBMG BULL. 16}
Reporter	Krohn, Douglas H., Wise, Kristine K. (Elliott, James E.)