Hardesty Homestead

The Hardesty Homestead is a feldspar, beryllium, mica, and tantalum mine located in Pennington county, South Dakota at an elevation of 4,800 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

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Site Name

Primary: Hardesty Homestead

Commodity

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

Location

State: South Dakota
County: Pennington
District: Unorganized 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

Type: Surface

Ownership

Owner Name: George Hardesty

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

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Spodumene Altered To Sericite. Amblygonite Is Altered.

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

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

Analytical Data

Not available

Materials

Ore: Beryl
Ore: Amblygonite
Ore: Cassiterite
Ore: Tantalite
Ore: Muscovite
Ore: Albite
Ore: Spodumene
Gangue: Topaz
Gangue: Quartz
Gangue: Graphite
Gangue: Rhodochrosite

Comments

Comment (Deposit): 4 ZONES: THE OUTER ZONE OF ALBITE-QUARTZ-MUSCOVITE CARRIES BERYL CRYSTALS. THE SECOND ZONE IS QUARTZ & ALBITE WITH SMALL AMOUNTS OF MUSCOVITE. THE THIRD ZONE CONTAINS SPODUMENE, AMBLYGONITE & TANTALITE & SOME BERYL. THE CORE IS QUARTZ.

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

Comment (Development): ECON.COM: BERYL CRYSTALS UP TO 8 INCHES, SOME BOOK MICA, SPODUMENE CRYSTALS UP TO 6 FEET LONG.

Comment (Workings): A SMALL OPENCUT.

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 (Production): U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707

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