The Big Six Mine is a tungsten mine located in Boulder county, Colorado at an elevation of 9,199 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.
Elevation: 9,199 Feet (2,804 Meters)
Primary Mineral: Tungsten
Lat, Long: 39.9639, -105.51250
Gallery: View 1 Big Six Mine Photos
Active Mining Claims
Claim data is for Mines level premium members.
Ore: Ore shoot had a stope length of about 40 ft on each level; plunged northeast; localized where at least one wall is aplite. Three drill holes showed a little ore at depths of 20 to 30 ft below bottom level; some underhand stoping done, but vein barren where cut by a hole 65 ft below level (not shown on map). Ore in main stopes consisted of veinlets of ferberite in brecciated horn quartz and sheeted aplite and schist. Ore mined in 1943 assayed about 1 percent WO3.
History and production: Mine owned by Crow Estate; worked by many different lessees at intervals from 1915 or earlier up to 1943, when operated by Boulder Tungsten Mills, Inc. Production not known; probably less than 1,000 units of W03.
Source: Geology and Ore Deposits of the Boulder County Tungsten District Colorado. USGS Professional Paper 245, 1953
Big Six Mine MRDS details
Site NamePrimary: Big Six Mine
Land StatusLand ownership: Private
Operation Category: Past Producer
Operation Type: Underground
Mining Method: Unknown
Years of Production:
PhysiographyGeneral Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Reference Category: Deposit
Reference: MINE MAP REPO # 402551, 405271 OWN/ LLOYD P MOCK