The Grant Mine is a gold and silver mine located in Custer 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: 43.795, -103.55500
Map: View on Google Maps
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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.
Grant Mine MRDS details
Site Name
Primary: Grant Mine
Secondary: Wild Rose Group
Commodity
Primary: Gold
Primary: Silver
Secondary: Tungsten
Location
State: South Dakota
County: Custer
District: Unorganized 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: Surface/Underground
Ownership
Owner Name: Jesse Harris
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
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
Form: IRREGULAR
Structure
Not available
Alterations
Not available
Rocks
Name: Pegmatite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Gold
Ore: Silver
Gangue: Quartz
Unknown: Wolframite
Comments
Comment (Production): A VERY SMALL AMOUNT WAS MINED AND MILLED.
Comment (Geology): THE SCHIST AND SLATE ARE INTENSELY DISTORTED AND FRACTURED.
Comment (Location): NW 1/4, NW 1/4
Comment (Development): 3 UNPATENTED LODE CLAIMS, APPROXIMATELY 60 ACRES ; ECON.COM: SCATTERED NATURE OF THE ORE SHOOTS MAKES LARGE-SCALE MINING IMPOSSIBLE. THE GRADE OF ORE WOULD NOT SUPPORT SMALL-SCALE SELECTIVE MINING.
Comment (Deposit): IRREGULAR QUARTZ FISSURE VEIN
Comment (Workings): SEVERAL SMALL OPEN CUTS AND SEVERAL SMALL, NARROW STOPES. 185 FEET OF DRIFTS ON 50 FOOT LEVEL; 170 FEET ON THE 100 FOOT LEVEL AND A WINCE TO 200 FOOT LEVEL
References
Reference (Deposit): U. S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707
Reference (Deposit): ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18
Reference (Production): U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707
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