Dan Patch Group

The Dan Patch Group is a feldspar, mica, and beryllium mine located in Pennington county, South Dakota at an elevation of 4,482 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: Dan Patch Group

Commodity

Primary: Feldspar
Primary: Mica
Primary: Beryllium
Tertiary: Tantalum
Tertiary: Zinc

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: Consolidated Feldspar Corp.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1905
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: PIPELIKE

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
Age Young: Neoproterozoic

Analytical Data

Not available

Materials

Ore: Sphalerite
Ore: Beryl
Ore: Muscovite
Gangue: Quartz
Gangue: Triphylite
Gangue: Cleavelandite
Gangue: Zircon
Gangue: Uraninite
Unknown: Albite

Comments

Comment (Workings): A SINGLE LARGE OPEN PIT.

Comment (Location): NE 1/4, NE 1/4

Comment (Production): BETWEEN JANUARY 1939 AND NOVEMBER 1, 1942

Comment (Development): FOUR UNPATENTED LODE CLAIMS

Comment (Deposit): THE MAIN MASS IS COARSE MICROCLINE-PERTHITE INTERGROWN WITH MASSIVE QUARTZ, ALBITE, AND MUSCOVITE, BERYL, COLUMBITE-TANTALITE, AND SPHALERITE OCCUR WITH THE MUSCOVITE.

Comment (Geology): BERYL IS WHITE, IN LARGE CRYSTALS, MUSCOVITE FORMS IN BOOKS OF IRREGULAR DISTRIBUTION.

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): AM. MINERALOGIST, VOL 56, P. 1-17.

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