The Hoffman Iron Deposit Mine is a iron mine located in Lawrence county, South Dakota at an elevation of 5,719 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: 5,719 Feet (1,743 Meters)
Commodity: Iron
Lat, Long: 44.30917, -103.69583
Map: View on Google Maps
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Hoffman Iron Deposit Mine MRDS details
Site Name
Primary: Hoffman Iron Deposit Mine
Commodity
Primary: Iron
Secondary: Manganese
Location
State: South Dakota
County: Lawrence
District: Lead 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
Ownership
Owner Name: J. L. Hoffman And Associates
Owner Name: Strawberry Hill Mining Co.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Placer
Operation Type: Unknown
Year First Production: 1948
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: HORIZONTAL
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: HAND SAMPLES RUN 35 - 52 % MN
Materials
Ore: Iron
Ore: Hematite
Comments
Comment (Development): MINING BEGUN ON SUNSET NO. 5 CLAIM IN SEC. 18 . NO MINING OF MANGANESE VEINS: 310 AC.
Comment (Deposit): DRILL HOLES UP TO 200 FEET BEYOND FACE SHOW ORE CONTINUES UNDER CONSIDERABLE OVERBURDEN WHICH CONSISTS OF SANDSTONE, QUARTZITE AND SHALE, THICKNESS RANGES FROM 2 - 11 FT.
Comment (Geology): THE MANGANESE IS IN CLOSELY SPACED FRACTURES IN THE LOWER PART OF THE DEADWOOD SANDSTONE AND QUARTZITE
References
Reference (Deposit): US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688
Reference (Production): US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688 .
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