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Dexter Claim

The Dexter Claim is a copper, gold, silver, and lead mine located in Pennington county, South Dakota at an elevation of 5,000 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: Dexter Claim  

State:  South Dakota

County:  Pennington

Elevation: 5,000 Feet (1,524 Meters)

Commodity: Copper, Gold, Silver, Lead

Lat, Long: 44.065, -103.47083

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 Dexter Claim

Dexter Claim MRDS details

Site Name

Primary: Dexter Claim
Secondary: Ashley & Nyswanger


Commodity

Primary: Copper
Primary: Gold
Primary: Silver
Primary: Lead


Location

State: South Dakota
County: Pennington
District: Pactola 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: Charles M. Ashley And Lydia Nyswanger


Production

Not available


Deposit

Record Type: Site
Operation Category: Occurrence
Deposit Type: Replacement
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: QUARTZ STRINGERS


Structure

Type: R
Description: Schist Strikes N. 67 E. And Dips 60 - 65 S.E.


Alterations

Alteration Type: L
Alteration Text: Iron Oxide Staining, Copper Stains.


Rocks

Name: Schist
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Schist
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic


Analytical Data

Not available


Materials

Ore: Gold
Ore: Silver
Ore: Galena
Ore: Copper
Gangue: Quartz


Comments

Comment (Development): FOUR UNPATENTED CLAIMS

Comment (Workings): TWO OPEN CUTS, 15 FEET APART. THE EAST CUT IS 30 FEET LONG IN 2 BENCHES, THE OTHER IS 20 FEET LONG AND 5 FEET DEEP AT THE FACE


References

Reference (Deposit): U.S. BUREAU OF MINES, 1954, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688


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