Bob Ingersoll Mine

The Bob Ingersoll Mine is a lithium, beryllium, and mica mine located in Pennington county, South Dakota at an elevation of 4,990 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

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.

Site Name

Primary: Bob Ingersoll Mine
Secondary: Ben Butler Mine
Secondary: Horace Greeley Mine
Secondary: Ingersoll Group

Commodity

Primary: Lithium
Primary: Beryllium
Primary: Mica
Secondary: Tin
Secondary: Tantalum
Secondary: Feldspar

Location

State: South Dakota
County: Pennington
District: Keystone 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: Black Hills Keystone Co.

Owner Name: Keystone Chemical Co.
Years: 1965 -

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: PIPE-SHAPED DIKES

Structure

Not available

Alterations

Not available

Rocks

Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Analytical Data

Not available

Materials

Ore: Spodumene
Ore: Cleavelandite
Ore: Feldspar
Ore: Muscovite
Ore: Amblygonite
Ore: Beryl
Ore: Cassiterite
Ore: Lepidolite
Gangue: Staurolite
Gangue: Uranophane
Gangue: Uraninite
Gangue: Zircon
Gangue: Almandite
Gangue: Triphylite
Gangue: Microlite

Comments

Comment (Commodity): MASSES OF AMBLYGONITE UP TO 8 TONS. SINGLE BERYL CRYSTALS UP TO 30 TONS IN DIKE NO. 2

Comment (Production): PLUS MATERIAL STILL IN STOCKPILE DECEMBER 31, 1944

Comment (Deposit): FIVE DIKES APPEAR ON THE PROPERTY OF WHICH TWO - THE NO. 1 AND NO. 2 HAVE BEEN EXPLOITED. DIKE NO. 1 IS A STEEP PIPELIKE BODY WHICH DIPS SE. DIKE NO. 2 IN HORIZONTAL CROSS SECTION AT THE MAIN LEVEL IS 110 BY 80 FEET. THE DIKES ARE WELL ZONED AND CONTAINS MASSES OF AMBLYGONITE UP TO 8 TONS AND BERYL CRYSTALS UP TO 30 TONS. THREE PATENTED CLAIMS.

Comment (Workings): DIKE NO. 1 - MINED BY A GLORY HOLE. DIKE NO. 2 - MINED BY OPENCUT, GLORY HOLE, AND BY STOPING IN A SUBLEVEL.

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): ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18

Reference (Deposit): HENKES, WILLIAM C., MCGREGOR, DUNCAN J., AND STOTELMEYER, R.B., 1967, MINERAL INDUSTRY OF SOUTH DAKOTA IN 1965, SOUTH DAKOTA GEOLOGICAL SURVEY MINERAL ECONOMIC REPORT 13

Reference (Production): U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707; HENKES, WILLIAM C., MCGREGOR , DUNCAN J., AND STOTELMEYER, R.B., 1967, MINERAL INDUSTRY OF SOUTH DAKOTA IN 1965, SOUTH DAKOTA GEOLOGICAL MINERAL ECONOMIC REPORT 13

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