Deadbroke Mine

The Deadbroke Mine is a gold and silver mine located in Lawrence 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: Deadbroke Mine  

State:  South Dakota

County:  Lawrence

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

Commodity: Gold, Silver

Lat, Long: 44.37778, -103.76778

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 Deadbroke Mine

Deadbroke Mine MRDS details

Site Name

Primary: Deadbroke Mine
Secondary: Phoenix Group


Commodity

Primary: Gold
Primary: Silver


Location

State: South Dakota
County: Lawrence
District: Lead District


Land Status

Not available


Holdings

Not available


Workings

Type: Underground


Ownership

Owner Name: Phoenix Gold Mining Co.


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Placer
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

Not available


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: Pyrite Cementing Material Oxidized To Limonite


Rocks

Name: Conglomerate
Role: Host
Age Type: Host Rock
Age Young: Late Cambrian

Name: Conglomerate
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cambrian


Analytical Data

Not available


Materials

Ore: Silver
Ore: Gold
Gangue: Limonite
Gangue: Pyrite


Comments

Comment (Location): NW 1/4 SW 1/4 , NORTH SIDE OF BLACKTAIL GULCH

Comment (Deposit): THE CONGLOMERATE IS 2 FT THICK AT THE OUTCROP AND INCREASES TO 22 FT AT THE NORTH END OF THE MINE.

Comment (Development): THE AREA PROBABLY AFFORDS BETTER OPPORTUNITIES FOR FINDING ADDITIONAL ORE THAN ANY OTHER CONGLOMERATE AREA.

Comment (Workings): THE STOPE IS 8 FT HIGH. THE MINE WAS WORKED BY EXTENSIVE DRIFTING, CROSS-CUTTING, AND STOPING FROM THE END OF THE INCLINE.

Comment (Geology): THE CONGLOMERATE RANGES FROM LESS THAN 2 FT THICK AT THE OUTCROP TO ABOUT 22 FT AT THE NORTH END OF THE MINE.


References

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

Reference (Deposit): US GEOLOGICAL SURVEY, US BUREAU OF RECLAMATION, AND SOUTH DAKOTA GEOLOGICAL SURVEY, 1975 , MINERAL AND WATER RESOURCES OF SOUTH DAKOTA, SOUTH DAKOTA GEOLOGICAL SURVEY BULLETIN 16 .

Reference (Deposit): ALLSMAN, P. T., 1940 , RECONNAISSANCE OF GOLD MINING DISTRICTS IN THE BLACK HILLS, SOUTH DAKOTA, BUREAU OF MINES BULLETIN 427 .


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