The White Cloud Prospect is a feldspar, mica, and beryllium mine located in Custer county, South Dakota at an elevation of 5,440 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: 5,440 Feet (1,658 Meters)
Commodity: Feldspar, Mica, Beryllium
Lat, Long: 43.70833, -103.62167
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.
White Cloud Prospect MRDS details
Site Name
Primary: White Cloud Prospect
Commodity
Primary: Feldspar
Primary: Mica
Primary: Beryllium
Location
State: South Dakota
County: Custer
District: Custer District
Land Status
Administrative Organization: Black Hills
Holdings
Not available
Workings
Type: Surface
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
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: DIKE
Structure
Not available
Alterations
Not available
Rocks
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Mica
Ore: Beryl
Ore: Feldspar
Gangue: Quartz
Comments
Comment (Deposit): TWO NARROWER DIKES, ONE ON EACH SIDE, PARALLEL THE MAIN DIKE. ONE IS 5 OR 6 FT WIDE AND THE OTHER IS 8-20 FT WIDE.
Comment (Geology): COARSE TEXTURED. BERYL CRYSTALS UP TO 1 INCH IN DIAMETER ARE FOUND.
Comment (Commodity): FELDSPAR IS OF GOOD QUALITY; MICA IS ONLY SUITABLE FOR SCRAP.
References
Reference (Deposit): U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707
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