The Elkhorn Mine is a mica, feldspar, and beryllium mine located in Custer county, South Dakota at an elevation of 5,200 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: 5,200 Feet (1,585 Meters)
Commodity: Mica, Feldspar, Beryllium
Lat, Long: 43.74694, -103.51611
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.
Elkhorn Mine MRDS details
Site Name
Primary: Elkhorn Mine
Secondary: Tinsley Mine
Commodity
Primary: Mica
Primary: Feldspar
Primary: Beryllium
Location
State: South Dakota
County: Custer
District: Custer District
Land Status
Land ownership: National Forest
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.
Administrative Organization: Black Hills
Holdings
Not available
Workings
Type: Surface
Ownership
Owner Name: Carl Roseberry Of Custer, Sd
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year Last Production: 1940
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Black Hills
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Feldspar
Ore: Mica
Ore: Beryl
Gangue: Tourmaline
Gangue: Cleavelandite
Gangue: Muscovite
Gangue: Andalusite
Gangue: Sillimanite
Gangue: Triphylite
Comments
Comment (Commodity): GOOD QUALITY FELDSPAR, PROMISING PROSPECT FOR BE. (PP 247, P. 114)
Comment (Location): MIDWAY BETWEEN THE HOT SHOT AND BECK MINES
Comment (Production): BE AND MIC PRODUCTION: SEVERAL TONS'
Comment (Deposit): BERYL CRYSTALS UP TO 3 INCHES IN DIAMETER
Comment (Workings): 30 FT DEEP AT THE FACE. 2 OPENCUTS
References
Reference (Production): USBM INFO CIRC 7707, P. 103; USGS PP 247, P. 115
Reference (Deposit): USBM INFO CIRC 7707, P.
Reference (Deposit): SDSMT BULL 18
Reference (Deposit): USGS PP 247, P. 114-118.
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