The Monitor Mine is a gold and silver mine located in Lawrence county, South Dakota at an elevation of 5,322 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: 5,322 Feet (1,622 Meters)
Commodity: Gold, Silver
Lat, Long: 44.35972, -103.76111
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.
Monitor Mine MRDS details
Site Name
Primary: Monitor Mine
Commodity
Primary: Gold
Primary: Silver
Location
State: South Dakota
County: Lawrence
District: Lead District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Homestake Mining Co.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Placer
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 BLANKET
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Conglomerate Was Cemented By Pyrite, Which Was Altered To Iron Oxides.
Rocks
Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Name: Rhyolite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene
Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Late Cambrian
Analytical Data
Not available
Materials
Ore: Silver
Ore: Gold
Comments
Comment (Location): S 1/2, CENTRAL
Comment (Workings): MINE WAS DEVELOPED BY A TUNNEL BEGINNING IN SCHIST BUT EXTENDING SOUTHEAST INTO THE ORE BODY. STOPES, 100 FEET WIDE AND 20 FEET HIGH.
Comment (Geology): AGE OF MINERALIZATION CONTROVERSIAL, PREC VS. TERT
References
Reference (Deposit): US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688 .
Reference (Deposit): SHAPIRO, LEWIS H., AND GRIES, JOHN 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.
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
