The Mountain Boy Mine is a silver mine located in Custer county, Colorado at an elevation of 9,049 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: 9,049 Feet (2,758 Meters)
Commodity: Silver
Lat, Long: 38.12917, -105.32361
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.
Mountain Boy Mine MRDS details
Site Name
Primary: Mountain Boy Mine
Secondary: Jackpot No. 1
Secondary: Midnight
Commodity
Primary: Silver
Secondary: Lead
Secondary: Zinc
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
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Underground
Discovery Year: 1882
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 veins
Orebody
Not available
Structure
Type: R
Description: Rosita Volcanic Center, Wet Mtns
Type: L
Description: Numerous Small Faults; Near Volcanic Vent; Near Bassick Breccia Pipes
Alterations
Alteration Type: L
Alteration Text: Strong Argillization, Very Bleached
Rocks
Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Oligocene
Name: Andesite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Oligocene
Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene
Analytical Data
Not available
Materials
Ore: Galena
Ore: Sphalerite
Gangue: Quartz
Gangue: Pyrite
Gangue: Calcite
Comments
Comment (Deposit): DEPOSIT FOLLOWS TRACHYTE DIKE
Comment (Workings): TUNNEL DRIVEN IN TRACHYTE DIKE 3 TO 6 FT WIDE; TUNNEL RUNS NORTH PARALLEL TO DEMOCRAT TUNNEL; CROSSCUT TO DEMOCRAT TUNNEL AT ABOUT 435 FT FROM ENTRANCE; DRIFTS RUN FROM BOTH TUNNELS AT VARIOUS ANGLES
Comment (Geology): DECOMPOSED GLASS ALTERED TO CLAY FOUND IN PLACES
Comment (Location): SE OF MOUNT TYNDALL , 0.6 MILE DUE EAST OF QUERIDA ; IN THE NE/4 SEC. 21, T 22 S, R 71 W; INFO FROM LAND.ST :(1976)
Comment (Reserve-Resource): A 1981 report suggested that low-grade, bulk-tonnage silver deposits may occur along the Mountain Boy-Contact vein. (Sunshine files)
References
Reference (Deposit): EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.
Reference (Deposit): SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAPS I-1081.
Reference (Reserve-Resource): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
Reference (Deposit): CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN REPORT, PT 2, P. 263-403.
Colorado Mining Photos
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