The Mcarthur Mine is a mica 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: Mica
Lat, Long: 43.70333, -103.62611
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.
Mcarthur Mine MRDS details
Site Name
Primary: Mcarthur Mine
Secondary: Firestone
Commodity
Primary: Mica
Secondary: Feldspar
Secondary: Beryllium
Location
State: South Dakota
County: Custer
District: Custer District
Land Status
Administrative Organization: Black Hills
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Walter Wright And Francis Michaud
Home Office: Custer, S.D.
Owner Name: L. H. Jeffries
Home Office: Custer S.D.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1900
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: ELONGATED DIKE
Structure
Type: L
Description: Well-Developed Folds Plunge 40-50 Deg, S12-15w
Alterations
Alteration Type: L
Alteration Text: Some Parts Of The Pegmatite Are Severely Altered
Rocks
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: MOST MICA IS IN BOOKS OF SEVERAL INCHES DIAMETER, USUALLY PALE TO DARK RUBY.
Materials
Ore: Mica
Ore: Beryl
Ore: Feldspar
Gangue: Garnet
Gangue: Xenotime
Gangue: Quartz
Gangue: Tourmaline
Gangue: Albite
Comments
Comment (Commodity): MICA IS GENERALLY GOOD QUALITY.
Comment (Deposit): TWO ZONES, ALBITE-QUARTZ-MUSCOVITE PEGMATITE AND PERTHITE-QUARTZ CORE.
Comment (Workings): 52 FT INCLINED SHAFT FROM WHICH SHORT DRIFTS HAVE BEEN DRIVEN. SMALL STOPES HAVE BEEN MINED ABOVE THE DRIFTS. THERE IS AN OPEN CUT.
References
Reference (Production): USBM INFO CIRC 7707, P. 153; USGS PP 247, P. 146.
Reference (Deposit): USGS PP 247, P. 146-148.
Reference (Deposit): ROBERTS, W. L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.
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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