The Spider Leg Mine is a tungsten mine located in Boulder county, Colorado at an elevation of 8,248 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: 8,248 Feet (2,514 Meters)
Commodity: Tungsten
Lat, Long: 39.97444, -105.50833
Map: View on Google Maps
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Mine Description
Location: 1,475 ft N. 370 E. of new shaft of Conger mine.
Workings: See figure 84 in gallery.
Geology: Workings on overlapping veins in two vein zones, one trending about north and one northeast. Most of veins dip east, but chief vein in southern part of northward-trending workings dips west. Mine in schist that contains many elongated bodies of pegmatite; veins productive where they cross some of these.
History and production: Veins worked near surface before 1914, when Hershey reported that ore 24 to 30 in. wide and 75 ft long had been mined but had pinched out only a few feet below surface. Most of workings shown in figure 84 driven in 1941-42 by Vanadium Corp. of America, the owner; about 3,800 units of WO3 in ore averaging about 1.2 percent WO3 produced at this time. Total output probably at least 5,000 units.
Source: Geology and Ore Deposits of the Boulder County Tungsten District Colorado. USGS Professional Paper 245, 1953
Spider Leg Mine MRDS details
Site Name
Primary: Spider Leg Mine
Commodity
Primary: Tungsten
Location
State: Colorado
County: Boulder
District: Boulder Tungsten
Land Status
Land ownership: Private
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
Year: 1942
Time Period: 1941-1942
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Mining Method: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: W veins
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Not available
Comments
Not available
References
Reference (Deposit): COLO BOM 1940 LIST
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
