Hoodoo - Union Hill Mine

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

Name: Hoodoo - Union Hill Mine  

State:  South Dakota

County:  Lawrence

Elevation: 5,400 Feet (1,646 Meters)

Commodity: Gold, Silver

Lat, Long: 44.33167, -103.67500

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 Hoodoo - Union Hill Mine

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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