Tin Mountain Mine

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

Name: Tin Mountain Mine  

State:  South Dakota

County:  Custer

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.


Satelite image of the Tin Mountain Mine

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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