The McMillan Group is a silver and gold mine located in Huerfano county, Colorado at an elevation of 12,080 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: 12,080 Feet (3,682 Meters)
Commodity: Silver, Gold
Lat, Long: 37.59028, -105.48583
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.
McMillan Group MRDS details
Site Name
Primary: McMillan Group
Secondary: Courthouse vein system
Commodity
Primary: Silver
Primary: Gold
Tertiary: Tellurium
Tertiary: Copper
Tertiary: Bismuth
Location
State: Colorado
County: Huerfano
District: Blanca District 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.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Deposit Type: Vein
Operation Type: Unknown
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
Form: TABULAR
Structure
Type: R
Description: Sierra Blanca Massif, Rio Grande Rift Zone, Ft. Garland Embayment
Type: L
Description: Sangre De Cristo Mtns Thrust Fault
Alterations
Not available
Rocks
Name: Mafic Intrusive Rock
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Mafic Intrusive Rock
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Hessite
Ore: Sylvanite
Comments
Comment (Location): ON NORTH SLOPE OF BLANCA PEAK IN HEADWATERS OF HUERFANO RIVER. LAT-LONG GIVEN IS PROJECTED EAST QUARTER-CORNER OF SEC. 25. ; INFO FROM LAND.ST :(1975)
Comment (Workings): CROSSCUT TUNNEL AND 40-TON CONCENTRATING MILL
References
Reference (Deposit): ECKEL, E.B., 1961, USGS BULL. 1114, P. 322-323.
Reference (Deposit): VANDERWILT, J.W., 1947, MINERAL RESOURCES OF COLORADO: COLORADO MINERAL RESOURCES BD., P. 31.
Reference (Deposit): COLO. DIV. MINES 1901-02 BIENN. REPT., P. 97-98.
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
