South Dakota · Custer County
Past Producer

Triangle A Lode

Custer County, South Dakota, United States
Feldspar
⌖ Show on mapUSGS source ↗
Commodities
PrimaryFeldspar
Commodity typeN
Deposit
Deposit sizeS
Orebody formIRREGULAR DIKE
Materials
Ore mineralsFeldspar
GangueQuartz, Tourmaline
Geology
Host rockPegmatite
Associated rockPegmatite
Tectonic settingSouthern Black Hills
Economic & production
Development statusPast Producer
Identification
Deposit ID10012487
MRDS IDD008137
RegionNA
Data scoreC
Coordinates43.7069, -103.49806
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707USBM INFO CIRC 7707.