The Union Mine is a gold and silver mine located in Lawrence county, South Dakota at an elevation of 5,679 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: 5,679 Feet (1,731 Meters)
Commodity: Gold, Silver
Lat, Long: 44.32361, -103.79861
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.
Union Mine MRDS details
Site Name
Primary: Union Mine
Secondary: Golden Reward Group
Commodity
Primary: Gold
Primary: Silver
Location
State: South Dakota
County: Lawrence
District: Ruby Basin District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Golden Reward Consolidated Gold Mining And Milling Co.
Production
Not available
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
Not available
Structure
Type: L
Description: Dikes And Minor Faults One Fault To The West Of The Main Workings Has 300 Ft Downthrow.
Alterations
Not available
Rocks
Name: Phonolite
Role: Associated
Age Type: Host Rock
Age Young: Late Cambrian
Name: Phonolite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene
Name: Phonolite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Name: Phonolite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cambrian
Analytical Data
Not available
Materials
Ore: Gold
Ore: Silver
Comments
Comment (Location): E 1/2 , CENTRAL
Comment (Deposit): 4 MAIN ORE BODIES - 1 LARGE AND 3 MUCH SMALLER, MAIN SHOOT 100 FT WEST OF THE SHAFT. ORE BODIES 2 , 3 AND 4 LAY RESPECTIVELY 650 , 1500 , AND 1925 FT WEST OF THE SHAFT. THE STRONGEST SHOOT EXTENDS SOUTH AND IS KNOWN AS THE MOGUL SHOOT.
Comment (Geology): ROOF EITHER SHALE OR THE BOTTOM OF AN IRREGULAR PHONOLITE SILL
References
Reference (Deposit): US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 1 , BUREAU OF MINES INFORMATION CIRCULAR 7688 .
Reference (Deposit): SHAPIRO, L. H., AND GRIES, J. P., 1970 , ORE DEPOSITS IN ROCKS OF PALEOZOIC AND TERTIARY AGE OF THE NORTHERN BLACK HILLS, SOUTH DAKOTA, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY.
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