Mine detail: Pocahontas Mine

Previously called 'South Leviathan, East LeviathanHumboldt-Pocahontas vein'

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Location

Lat / long:

38.10473, -105.33613

Resource(M)

Primary:	Silver
Secondary:	Copper, Lead
Ore:	Chalcopyrite, Galena, Malachite, Pyrite, Silver, Stephanite, Tetrahedrite
Gangue:	Barite, Calcite, Clay
Discovery year:	1874

Production

Operation type:	Underground
Production size:	Small
Development status:	Past Producer
First production started:	1874

Geology

Host rock:	Rosita Andesite;Game Ridge Trachyte
Host type:	Andesite,Volcanic Breccia (Agglomerate)
Associated type:	Trachyte
Structure:	Rosita Volcanic Center, Wet Mtns, Rosita Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Strongly Argillized

References

MRDS	D008070
DEP	10012438
Reference	{Deposit:: CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.}{Deposit:: EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.}{Deposit:: SHARP, W.N., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081, 1:24,000.}{Reserve-Resource:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}
Reporter	Collins, Donna B., Beach, Richard A.