Commodities
PrimaryFeldspar, Mica, Beryllium, Lithium
Commodity typeB
Deposit
Deposit sizeY
WorkingsSurface/Underground
Orebody formCRESCENT-SHAPED DIKE
Materials
Ore mineralsBeryl, Lithiophilite, Microcline, Muscovite
GangueAlbite, Amblygonite, Apatite, Purpurite, Tourmaline
Geology
Host rockMica Schist · Quartz Two-Mica Schist;Harney Peak Granite
Associated rockPegmatite · Pegmatite
Economic & production
Development statusPast Producer
Discovery year1880
Identification
Deposit ID10055679
MRDS IDSD02293
RegionNA
Data scoreB
Coordinates43.71552, -103.66974
References
U. S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707FISHER, D.J., 1942, PRELIMINARY REPORT ON SOME PEGMATITES OF THE CUSTER DISTRICT, SOUTH DAKOTA GEOLOGICAL SURVEY REPORT OF INVESTIGATIONS 44BIENIEWSKI, C.L., AND AGNEW, A.F., 1964, THE MINERAL INDUSTRY OF SOUTH DAKOTA IN 1962, SOUTH DAKOTA GEOLOGICAL SURVEY MINERALS REPORT 10BIENIEWSKI, C.L., AND MCGREGOR, D.J., 1965, THE MINERAL INDUSTRY OF SOUTH DAKOTA IN 1963, SOUTH DAKOTA GEOLOGICAL SURVEY MINERALS REPORT 11U. S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707 / SOUTH DAKOTA GEOLOGICAL SURVEY MINERAL REPORTS 10 AND 11.