The May Group is a gold mine located in Custer county, South Dakota at an elevation of 5,600 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: 5,600 Feet (1,707 Meters)
Commodity: Gold
Lat, Long: 43.69806, -103.69972
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.
May Group MRDS details
Site Name
Primary: May Group
Commodity
Primary: Gold
Location
State: South Dakota
County: Custer
District: Unorganized District
Land Status
Administrative Organization: Black Hills
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Francis Michaud, Monte Heumphreus, Mary And Ford Heumphreus, Of Custer, S.D.; Palmer Hibbard
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1890
Year Last Production: 1938
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: QUARTZ STRINGER
Structure
Not available
Alterations
Not available
Rocks
Name: Hornblendite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Hornblendite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Gold
Comments
Comment (Commodity): REPORTS BEFORE 1900 INDICATE $80 GOLD PANNED FROM SURFACE MATERIAL IN 2 HOURS.
Comment (Workings): TWO 100 FT SHAFTS, ANOTHER IS 60-70 FT DEEP. A FEW SHORT DRIFTS.
Comment (Deposit): 7 UNPATENTED CLAIMS TOTALING 130 ACRES. A HORNBLENDE DIORITE DIKE USUALLY IS PRESENT ON ONE OF THE WALLS. THE ORE WAS IN A POCKET. STEEPLY DIPPING.
References
Reference (Deposit): U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707
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