Mine detail: Colorado Central Mine

Previously called 'Equator TunnelMarshall TunnelAliunde Tunnel and ShaftOcean Wave Tunnel'

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Location

Lat / long:

39.69666, -105.70642

Resource(M)

Primary:	Silver, Lead, Zinc
Secondary:	Copper, Gold
Ore:	Argentite, Chalcopyrite, Galena, Polybasite, Proustite, Pyrargyrite, Silver, Sphalerite, Stephanite, Tetrahedrite
Gangue:	Ankerite, Barite, Calcite, Hematite, Kaolinite, Pyrite, Quartz, Siderite

Production

Operation type:	Unknown
Production size:	Large
Development status:	Past Producer

Geology

Host rock:	Idaho Springs Formation, Silver Plume Granite
Host type:	Gneiss,Granite,Pegmatite
Associated type:	Porphyry
Structure:	vein junctions, dip changes, wall rock compentency
Alteration processes:	wall rock altered to sericite, quartz, siderite

References

MRDS	D002832
DEP	10107835
Reference	{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:: Lovering, T. S., and Goddard, E. N., 1950, Geology and ore deposits of the Front Range, Colorado: U.S. Geological Survey Professional Paper 223, 319 p.}{Deposit:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}{Deposit:: REF:BOM ANNUAL REPORT 1915}
Reporter	Hasler, J. William, Intermountain Field Operations Center (IFOC), Beach, Richard A., Melton, Greg