The Custer Mountain Lode is a feldspar, mica, lithium, and beryllium mine located in Custer county, South Dakota.
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:
Commodity: Feldspar, Mica, Lithium, Beryllium
Lat, Long: 43.75528, -103.56528
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.
Custer Mountain Lode MRDS details
Site Name
Primary: Custer Mountain Lode
Secondary: Snookum
Commodity
Primary: Feldspar
Primary: Mica
Primary: Lithium
Primary: Beryllium
Tertiary: Tantalum
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: George Beach Estate
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
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
Form: IRREGULAR
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: Spodumene
Ore: Lepidolite
Ore: Beryl
Gangue: Apatite
Gangue: Pyrite
Gangue: Cassiterite
Gangue: Triphylite
Gangue: Andalusite
Gangue: Tourmaline
Gangue: Quartz
Gangue: Uraninite
Gangue: Lithiophilite
Gangue: Sillimanite
Gangue: Lazulite
Unknown: Amblygonite
Comments
Comment (Workings): SEVERAL SMALL CUTS AND PITS AND A LARGE OPEN CUT WHICH IS 35 FEET DEEP
Comment (Production): YEAR ENDING JULY 1938
Comment (Deposit): A SMALL CUT IN THE FLOOR OF THE OPENCUT DISCLOSES LEPIDOLITE AND SPODUMENE. THIS MAY INDICATE A LEPIDOLITE CORE.
References
Reference (Deposit): USBM INFO CIRC 7707, P. 100
Reference (Deposit): USGS PP 247, P. 97-98
Reference (Deposit): SDGS RI 50, P. 37-56.
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