The Pocahontas Mine is a silver mine located in Custer county, Colorado at an elevation of 9,350 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 9,350 Feet (2,850 Meters)
Commodity: Silver
Lat, Long: 38.10472, -105.33556
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Pocahontas Mine MRDS details
Site Name
Primary: Pocahontas Mine
Secondary: South Leviathan, East Leviathan
Secondary: Humboldt-Pocahontas vein
Commodity
Primary: Silver
Secondary: Copper
Secondary: Lead
Location
State: Colorado
County: Custer
District: Rosita Hills District
Land Status
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Year: 1893
Time Period: 1874-1878
Mined: 2300.000 mt
Material type: ore
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Year First Production: 1874
Discovery Year: 1874
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Epithermal vein, generic
Orebody
Not available
Structure
Type: R
Description: Rosita Volcanic Center, Wet Mtns
Type: L
Description: Rosita Fault
Alterations
Alteration Type: L
Alteration Text: Strongly Argillized
Rocks
Name: Andesite
Role: Host
Age Type: Host Rock Unit
Age Young: Oligocene
Name: Trachyte
Role: Associated
Age Type: Host Rock
Age Young: Oligocene
Name: Trachyte
Role: Associated
Age Type: Associated Rock
Age Young: Miocene
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Tetrahedrite
Ore: Silver
Ore: Malachite
Ore: Chalcopyrite
Ore: Galena
Ore: Stephanite
Gangue: Barite
Gangue: Calcite
Gangue: Clay
Comments
Comment (Deposit): THE ROSITA REDUCTION WORKS WERE BUILT TO TREAT ORES FROM THIS MINE ; INFO.SRC : 1 PUB LIT
Comment (Geology): A fissure sulfide vein trends NW-SE and dips SW; traced for 4000 ft., it contained high-grade silver ore.
Comment (Location): SW SLOPE OF POCAHONTAS HILL, 1/2 MILE NORTH OF ROSITA, IN THE SW/4 SEC.28, T 22 S, R 71 W. INFO FROM LAND.ST :(1976)
Comment (Workings): TWO SHAFTS, SEVERAL TUNNELS ON HANGING WALL SIDE; AT TIMES WORKED FROM HUMBOLDT MINE
Comment (Production): WITH HUMBOLDT PRODUCED OVER $900,000 BETWEEN 1874-1896
Comment (Reserve-Resource): A 1981 report suggested that low-grade, bulk-tonnage silver deposits may occur along the Humboldt-Pocahontas vein. (Sunshine files)
References
Reference (Deposit): CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.
Reference (Reserve-Resource): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
Reference (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.
Reference (Production): EMMONS, S.F., 1896
Reference (Deposit): EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
