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
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.
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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