The Hoodoo - Union Hill Mine is a gold and 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
Elevation: 5,400 Feet (1,646 Meters)
Commodity: Gold, Silver
Lat, Long: 44.33167, -103.67500
Map: View on Google Maps
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Hoodoo - Union Hill Mine MRDS details
Site Name
Primary: Hoodoo - Union Hill Mine
Secondary: Eureka Mine
Commodity
Primary: Gold
Primary: Silver
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: Branch Mint Mining And Milling Co.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
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 Limestone Near Surface
Rocks
Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Pliocene
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene
Analytical Data
Not available
Materials
Ore: Gold
Ore: Silver
Gangue: Pyrite
Gangue: Limonite
Comments
Comment (Workings): 3 SHAFTS - THE HOODOO, THE UNION HILL AND THE EUREKA. ALSO 4 PROSPECT TUNNELS. THE EUREKA SHAFT IS 200 FT DEEP. THE HOODOO IS 300 FT DEEP WITH 450 FT OF LATERAL WORK ON THE 100 AND 200 FT LEVELS AND AN 800 FT DRIFT AT THE BOTTOM WHICH CONNECTS TO THE UNION HILL SHAFT. THE UNION HILL SHAFT IS 470 FT DEEP.
Comment (Geology): IN THE SAME MASS OF QUARTZ MONZONITE PORPHYRY AS THE GILT EDGE MINE.
Comment (Location): SW 1/4 OF SEC. 5 AND SE 1/4 OF SEC. 6
Comment (Development): 120 AC PATENTED MINERAL CLAIMS
Comment (Deposit): ORE IN BRECCIATED ZONES
References
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 (Production): US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688 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): US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688 .
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