The Silver Star Extension Mine is a silver mine located in La Plata county, Colorado at an elevation of 9,501 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: 9,501 Feet (2,896 Meters)
Commodity: Silver
Lat, Long: 37.61028, -107.77694
Map: View on Google Maps
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Silver Star Extension Mine MRDS details
Site Name
Primary: Silver Star Extension Mine
Commodity
Primary: Silver
Tertiary: Copper
Location
State: Colorado
County: La Plata
District: Cascade 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: San Juan N. F.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year Last Production: 1925
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Not available
Structure
Type: R
Description: San Juan Uplift
Type: L
Description: Needle Mtns Uplift
Alterations
Alteration Type: L
Alteration Text: Fe Oxidation
Rocks
Name: Gneiss
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Gneiss
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: LIMONIT-STAINED QUARTZ AND PYRITE SAMPLE FROM ORE PILE AT BASE OF SLOPE CONTAINED 0.6 OZ/TON AG AND 0.01% CU. LIMONITE-STAINED QUARTZ AND PYRITE SAMPLE FROM DUMP AT PORTAL CONTAINED 0.2 OZ/TON AG.
Materials
Ore: Pyrite
Gangue: Quartz
Gangue: Limonite
Comments
Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). AT SW END OF WEST NEEDLE MTNS ABOVE AND NE OF CASCADE CREEK NEAR RIM. ; INFO FROM LAND.ST :1974
Comment (Development): SCOTT (1983) FOUND MINOR AG OCCURRENCE IN ANALYTICAL DATA BUT STATES THAT ODEL WILEY OF FARMINGTON, NM (IN 1982 PERS. COMM.), CITED PRODUCTION OF LOW-GRADE AG ORE IN 1920S FROM SILVER STAR EXTENSION AND BITTEROOT MINES.
Comment (Workings): ONE TUNNEL OF UNKNOWN EXTENT HEADING PROBABLY NE OR ENE.
References
Reference (Deposit): BARKER, FRED, 1969, PRECAMBRIAN GEOLOGY OF THE NEEDLE MOUNTAINS, SOUTHWESTERN COLORADO: USGS PROF. PAPER 644-A.
Reference (Deposit): SCOTT, D.C., 1983, MINERAL INVESTIGATION OF THE WEST NEEDLE WILDERNESS STUDY AREA AND THE BLM WEST NEEDLE CONTIGUOUS WILDERNESS STUDY AREA, LA PLATA AND SAN JUA COUNTIES, COLORADO: USBM MLA 35-83, P. 7, 19.
Reference (Deposit): CROSS, WHITMAN, AND HOLE, A.D., 1910, DESCRIPTION OF THE ENGINEER MOUNTAIN QUADRANGLE: USGS FOLIO 171.
Colorado Mining Photos
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