South Dakota · Custer County
Past Producer
Hofert Arcade
Custer County, South Dakota, United States
Mica
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USGS source ↗
Commodities
Primary
Mica
Commodity type
N
Deposit
Deposit size
S
Workings
Surface
Orebody form
IRREGULAR, BRANCHING
Materials
Ore minerals
Muscovite
Gangue
Biotite, Garnet, Microcline, Oligoclase, Quartz, Sillimanite, Tourmaline
Geology
Host rock
Schist · Schist
Associated rock
Pegmatite · Pegmatite
Economic & production
Development status
Past Producer
Identification
Deposit ID
10104259
MRDS ID
SD02309
Alternate names
Victory No. 1 Prospect
Region
NA
Data score
B
Coordinates
43.79357, -103.53278
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707