Groshong Mine

The Groshong Mine is a silver mine located in Lawrence county, South Dakota at an elevation of 5,400 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: Groshong Mine
Secondary: Silver Queen Group

Commodity

Primary: Silver
Secondary: Lead
Tertiary: Vanadium

Location

State: South Dakota
County: Lawrence
District: Galena 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: Underground

Ownership

Owner Name: Stewart, H. H. And Thompson, Nels

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
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: FLATTENED LENTICULAR BODIES CONFORMABLE TO BEDDING

Structure

Type: L
Description: The Deadwood Formation Dips 10 Deg Ne And Within The Mine Is 5 - 11 Deg From N 15 Deg W To N 80 Deg E

Alterations

Alteration Type: L
Alteration Text: Highly Oxidized Ore To A Soft, Yellow-Brown

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Lead
Ore: Galena
Ore: Silver

Comments

Comment (Location): CENTER OF SECTION

Comment (Development): GROSHONG CLAIM ; ECON.COM: HIGH VALUES AG & PB, SOMETIMES VANADIUM AS HIGH AS 5%

Comment (Workings): TWO CLOSELY SPACED PORTALS LEADING INTO A SINGLE ADIT, WHICH EXTENDS NORTHEAST ALONG A VERTICAL MINERALIZED FRACTURE FOR APPROXIMATELY 310 FEET.

References

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

Reference (Deposit): SHAPIRO, LEWIS H., AND GRIES, JOHN P., 1970 , ORE DEPOSITS IN ROCKS OF PALEOZOIC AND TERTIARY AGE OF THE NORTHERN BLACK HILLS, SOUTH DAKOTA, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY.

Reference (Production): US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES, INFORMATION CIRCULAR 7688

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