The Invincible Shaft is a silver and copper mine located in Custer county, Colorado at an elevation of 9,140 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: 9,140 Feet (2,786 Meters)
Commodity: Silver, Copper
Lat, Long: 38.10778, -105.34750
Map: View on Google Maps
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Invincible Shaft MRDS details
Site Name
Primary: Invincible Shaft
Commodity
Primary: Silver
Primary: Copper
Secondary: Lead
Secondary: Iron
Location
State: Colorado
County: Custer
District: Rosita Hills District
Land Status
Land ownership: Federal
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.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Discovery Year: 1895
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: Epithermal veins
Orebody
Not available
Structure
Type: R
Description: Rosita Cauldron And Crater Complex
Type: L
Description: North-Trending Fissures Dipping 60 To 70 Degrees East; Trachyte Dike Nearby
Alterations
Alteration Type: L
Alteration Text: Weakly Argillized, Strongly Argillized In Places
Rocks
Name: Andesite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Oligocene
Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Oligocene
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Tetrahedrite
Ore: Silver
Ore: Malachite
Ore: Covellite
Ore: Chalcopyrite
Ore: Stephanite
Ore: Galena
Gangue: Barite
Gangue: Calcite
Gangue: Clay
Comments
Comment (Location): Orinal location precision entry (line 1): 0.9 N36W FROM ROSITA, CO.
Comment (Reserve-Resource): A 1981 report suggested that low-grade, bulk-tonnage silver deposits may occur along the Invincible-Pioneer vein and south of the Leavenworth-Humboldt-Pocahontas vein. (Sunshine files)
Comment (Workings): A SHAFT WAS SUNK TO AN UNKNOWN DEPTH
Comment (Commodity): MINERALOGICALLY SIMILAR TO HUMBOLDT MINE; PYRITE, BARITE, MALACHITE, COVELLITE ON DUMP
Comment (Development): A SHAFT WAS SUNK TO AN UNKNOWN DEPTH
Comment (Geology): COMPARATIVELY FRESH ROSITA ANDESITE IN PLACES
Comment (Location): NEAR ALEXANDER SHAFT AND PRINGLE HILL, IN THE N/2 SEC.29, T 22 S, R 71 W; INFO FROM LAND.ST :(1976)
References
Reference (Deposit): SIEMS, P.L., 1967, VOLCANIC AND ECONOMIC GEOLOGY OF THE ROSITA HILLS AND SILVER CLIFF DISTRICTS, CUSTER COUNTY, COLORADO: COLORADO SCHOOL MINES, D.SC THESIS, T1042, 222 P.
Reference (Deposit): SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAPS I-1081.
Reference (Deposit): CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.
Reference (Reserve-Resource): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
Colorado Mining Photos
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