Mine detail: Alma-Lincoln Mine

Previously called 'Ruby aditElliott & Barber 1 & 2Lincoln Group (Lincoln, South Lincoln, Josephine, Elliott and Barber)PlattJosephine Shaft & TunnelAlma Lincoln'

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Location

Lat / long:

39.74971, -105.55031

Resource(M)

Primary:	Gold, Silver, Lead, Copper
Secondary:	Zinc
Tertiary:	Uranium
Ore:	Chalcopyrite, Enargite, Galena, Polybasite, Pyrite, Sphalerite, Tennantite, Gold, Cerussite, Chalcocite, Covellite
Gangue:	Ankerite, Quartz

Production

Operation type:	Underground
Development status:	Past Producer

Geology

Host rock:	Idaho Springs Formation
Host type:	Gneiss,Pegmatite,Porphyry
Alteration processes:	silicification and brecciation

References

MAS	80190044
DEP	10165765
Reference	{Deposit:: REF:MAS,OWNER:ROBERT H DELASHMUTT}{Deposit:: Spurr, J. E., Garrey, G. H., and Ball, S. H., 1908, Economic geology of the Georgetown quadrangle, Colorado: U.S. Geological Survey Professional Paper 63, 422 p.}{Deposit:: Moench, R. H., and Drake, A. A., Jr., 1966, Economic geology of the Idaho Springs district, Clear Creek and Gilpin counties, Colorado: U.S. Geological Survey Bulletin 1208, 91 p.}{Deposit:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}
Reporter	Melton, Greg, Minecom, Beach, Richard A., Intermountain Field Operations Center (IFOC)