Grand Junction and Hartford Group

The Grand Junction and Hartford Group is a silver and gold mine located in Custer county, South Dakota at an elevation of 6,079 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: Grand Junction and Hartford Group  

State:  South Dakota

County:  Custer

Elevation: 6,079 Feet (1,853 Meters)

Commodity: Silver, Gold

Lat, Long: 43.84861, -103.67222

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 Grand Junction and Hartford Group

Grand Junction and Hartford Group MRDS details

Site Name

Primary: Grand Junction and Hartford Group


Commodity

Primary: Silver
Primary: Gold


Location

State: South Dakota
County: Custer
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/Underground


Ownership

Owner Name: C. C. Crary


Production

Year: 1880


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: IRREGULAR


Structure

Not available


Alterations

Not available


Rocks

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

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

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


Analytical Data

Not available


Materials

Ore: Gold
Ore: Silver
Gangue: Sphalerite
Gangue: Quartz
Gangue: Galena
Gangue: Pyrrhotite


Comments

Comment (Workings): 70 FEET DEEP; SEVERAL SMALLER CUTS, TWO ADITS & A SHAFT

Comment (Location): W 1/2, CENTRAL

Comment (Development): 2 UNPATENTED 10 ACRE CLAIMS ; ECON.COM: 40-STAMP MILL

Comment (Deposit): ORE OCCURS IN BRECCIATED ZONE ALONG THE HANGING WALL SIDE OF A LARGE IRREGULAR QUARTZ DIKE TRACED AS A CONSPICUOUS OUTCROP FOR 2 MILES.


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


The Top Ten Gold Producing States

The Top Ten Gold Producing States

These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.