The Tin Mountain Mine is a mica, cesium, feldspar, and lithium mine located in Custer county, South Dakota at an elevation of 5,561 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 5,561 Feet (1,695 Meters)
Commodity: Mica, Cesium, Feldspar, Lithium
Lat, Long: 43.74639, -103.71861
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Tin Mountain Mine MRDS details
Site Name
Primary: Tin Mountain Mine
Commodity
Primary: Mica
Primary: Cesium
Primary: Feldspar
Primary: Lithium
Secondary: Beryllium
Secondary: Tantalum
Location
State: South Dakota
County: Custer
District: Custer District
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: Black Hills National Forest
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Walter S. Clifford
Owner Name: Maywood Chemical Works
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Black Hills
Mineral Deposit Model
Not available
Orebody
Form: IRREGULAR, L-SHAPED
Structure
Not available
Alterations
Not available
Rocks
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: BIOTITE CONTAINS 3.15 PERCENT CS20
Materials
Ore: Beryl
Ore: Columbite
Ore: Spodumene
Ore: Pollucite
Ore: Muscovite
Ore: Biotite
Ore: Andesine
Ore: Albite
Ore: Amblygonite
Gangue: Tourmaline
Gangue: Almandite
Gangue: Zircon
Gangue: Triphylite
Gangue: Goethite
Gangue: Uranophane
Gangue: Uraninite
Gangue: Lepidolite
Gangue: Quartz
Gangue: Calcite
Gangue: Cleavelandite
Gangue: Chalcopyrite
Gangue: Bismuthinite
Gangue: Apatite
Gangue: Turquoise
Gangue: Vanadinite
Gangue: Sphalerite
Gangue: Malachite
Gangue: Cassiterite
Gangue: Montmorillonite
Unknown: Microcline
Comments
Comment (Location): SE 1/4, NE 1/4
Comment (Deposit): 4 ZONES - (1) COARSE MASSIVE QUARTZ, (2) COARSE MICROCLINE PERTHITE, (3) MEDIUM-GRAINED PERTHITE-QUARTZ-MUSCOVITE OR ALBITE-QUARTZ-MUSCOVITE OR QUARTZ-MUSCOVITE, (4) FINE-GRAINED QUARTZ-MUSCOVITE-TOURMALINE.
Comment (Development): PATENTED 9 ACRE CLAIM ; ECON.COM: MOST VALUABLE MINERALS ARE FOUND IN THE COARSE, CENTER PART OF THE PEGMATITE.
Comment (Workings): DEVELOPMENT CONSISTS OF SEVERAL HUNDRED FEET OF UNDERGROUND OPENINGS AND 2 LARGE STOPES.
Comment (Production): MORE THAN 19,000 TONS OF ORE HAVE BEEN PRODUCED. BERYLLIUM PRODUCTION IN 1962 WAS BETWEEN 10,000 AND 1,000,000 LBS.
References
Reference (Deposit): U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707
Reference (Deposit): SCHWARTZ, G.M., 1930, TIN MOUNTAIN SPODUMENE MINE, ECONOMIC GEOLOGY, VOL. 25, PP. 275-284
Reference (Deposit): BIENIEWSKI, C.L., AND AGNEW, A.F., 1964, THE MINERAL INDUSTRY OF SOUTH DAKOTA IN 1962, SOUTH DAKOTA GEOLOGICAL SURVEY MINERALS REPORT 10
Reference (Deposit): ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18
Reference (Production): U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707 / BIENIEWSKI, C.L., AND AGNEW, A.F., 1964, THE MINERAL INDUSTRY OF SOUTH DAKOTA IN 1962, SOUTH DAKOTA GEOLOGICAL SURVEY MINERALS REPORT 10
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