South Dakota · Custer County
Past Producer
Chipmunk No. 25 Claim
Custer County, South Dakota, United States
Feldspar
Beryllium
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USGS source ↗
Commodities
Primary
Feldspar, Beryllium
Commodity type
B
Deposit
Deposit size
S
Orebody form
DIKE
Materials
Ore minerals
Beryl, Feldspar
Gangue
Muscovite, Quartz, Tourmaline
Geology
Host rock
Pegmatite
Associated rock
Pegmatite
Tectonic setting
Southern Black Hills
Economic & production
Development status
Past Producer
Identification
Deposit ID
10055738
MRDS ID
SD02472
Alternate names
Dilley's Chipmunk
Region
NA
Data score
B
Coordinates
43.70246, -103.60778
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707