The Terry & Terry No. 1 Claims is a mica mine located in Custer county, South Dakota at an elevation of 5,240 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: 5,240 Feet (1,597 Meters)
Commodity: Mica
Lat, Long: 43.77194, -103.56167
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.
Terry & Terry No. 1 Claims MRDS details
Site Name
Primary: Terry & Terry No. 1 Claims
Secondary: Thom Carroll Property
Commodity
Primary: Mica
Secondary: Tantalum
Location
State: South Dakota
County: Custer
District: Custer 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: Phillip Demming
Owner Name: John Ross And Kenneth Spring
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
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: DIKE
Structure
Type: L
Description: Flat Fault 8 Feet Below Surface.
Alterations
Not available
Rocks
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: MICA COMPOSES AS MUCH AS 20 TO 25 PERCENT OF THE PEGMATITE
Materials
Ore: Mica
Comments
Comment (Production): LESS THAN 10 PERCENT WAS NO. 1 GRADE
Comment (Deposit): COMPOSITE OF TWO PEGMATITE DIKES
Comment (Workings): TWO SHAFTS AND ONE SMALL OPEN PIT. ONE SHAFT IS 50 FT DEEP BUT IS BACKFILLED TO 22 FEET BELOW THE SURFACE. THE OTHER SHAFT IS AN INCLINED SHAFT OF 18 FEET. SHORT DRIFTS WERE DRIVEN FROM THE DEEPER SHAFT, BUT ARE INACCESSIBLE.
References
Reference (Deposit): U.S. BUREAU OF MINES, 1954, 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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