South Dakota · Custer County
Past Producer

McKirahan Mica Prospect

Custer County, South Dakota, United States
Mica
⌖ Show on mapUSGS source ↗
Commodities
PrimaryMica
Commodity typeN
Deposit
Deposit sizeS
WorkingsSurface
Orebody formIRREGULAR
Materials
Ore mineralsMuscovite
GangueAlbite, Biotite
Geology
Host rockSchist
Associated rockPegmatite
AlterationIron Staining, Weathering
Economic & production
Development statusPast Producer
Identification
Deposit ID10012480
MRDS IDD008127
RegionNA
Data scoreC
Coordinates43.63829, -103.45973
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.USGS PP 247, P. 148.USBM INFO CIRC 7707.