Commodities
PrimaryFeldspar, Mica, Lithium, Tin
SecondaryBeryllium, Tantalum
TertiaryTungsten
Commodity typeB
Deposit
Deposit sizeS
Orebody formPIPELIKE, ELLIPTICAL
Materials
Ore mineralsAlbite, Beryl, Cassiterite, Muscovite, Plagioclase, Spodumene, Wolframite
GangueBarite, Biotite, Bismuth, Chalcocite, Chalcopyrite, Corundum, Diopside, Eucryptite, Galena, Gold, Kaolinite, Lazulite, Malachite, Molybdenite, Olivenite, Opal, Petalite, Pyrite, Quartz, Rutile, Siderite, Sphalerite, Stannite, Torbernite, Uraninite, Vivianite
Geology
Host rockSchist · Schist
Associated rockPegmatite · Pegmatite;Harney Peak Granite
Economic & production
Development statusPast Producer
First production1898
Identification
Deposit ID10055688
MRDS IDSD02304
Alternate namesEtta Claim and Ferguson Claim
RegionNA
Data scoreB
Coordinates43.88079, -103.41889
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707SCHWARTZ, G.M., 1925, GEOLOGY OF THE ETTA SPODUMENE MINE, ECONOMIC GEOLOGY, VOL. 20, PP. 646-659FISHER, D.J., 1945, PRELIMINARY REPORT ON THE MINERALOGY 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 / U.S. GEOLOGICAL SURVEY, U.S.BUREAU OF RECLAMATION, AND SOUTH DAKOTA GEOLOGICAL SURVEY, 1975, MINERAL AND WATER RESOURCES OF SOUTH DAKOTA, SOUTH DAKOTA GEOLOGICAL SURVEY BULLETIN 16 / BIENIEWSKI, C.L., AND AGNEW, A.F., 1964, THE MINERAL INDUSTRY OF SOUTH DAKOTA IN 1962, SOUTH DAKOTA GEOLOGICAL SURVEY MINERALS REPORT 10U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707 / SOUTH DAKOTA GEOLOGICAL SURVEY MINERALS REPORT 10