Commodities
PrimaryFeldspar, Mica
TertiaryTantalum, Niobium (Columbium), Beryllium
Commodity typeB
Deposit
Deposit sizeS
WorkingsSurface/Underground
Materials
Ore mineralsBeryl, Columbite, Feldspar, Muscovite, Tantalite
GangueAmblygonite, Cassiterite, Cleavelandite, Lepidolite, Spodumene, Tourmaline
Geology
Host rockPegmatite
Associated rockPegmatite
StructureFaults, Shear Zones, Quartz Veins, Aplite Dikes
Economic & production
Development statusProducer
First production1880
Identification
Deposit ID10055767
MRDS IDSD02512
Alternate namesWestinghouse No. 1
RegionNA
Data scoreB
Coordinates43.70246, -103.6864
References
U. S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707, P. 149SDSMT BULL 18USGS PP 247, P. 163-170USGS PP 247, P. 169