Commodities
PrimaryBeryllium, Feldspar, Mica
TertiaryTantalum
Commodity typeB
Deposit
Deposit sizeS
WorkingsSurface/Underground
Materials
Ore mineralsBeryl, Cleavelandite, Muscovite
GangueAlbite, Microcline, Quartz
Geology
Host rockMica Schist
Associated rockPegmatite
Tectonic settingSouthern Black Hills
Economic & production
Development statusPast Producer
First production1939
Identification
Deposit ID10011970
MRDS IDD007184
RegionNA
Data scoreB
Coordinates43.73329, -103.61667
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707FISHER, D.J., 1945, PRELIMINARY REPORT ON THE MINEROLOGY OF SOME PEGMATITES NEAR CUSTER, SOUTH DAKOTA GEOLOGICAL SURVEY REPORT OF INVESTIGATIONS 50ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.