Big Six Mine

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.

Mine Info

Name: Big Six Mine  

State:  Colorado

County:  Boulder

Gallery: View 1 Big Six Mine Photos

Elevation: 9,199 Feet (2,804 Meters)

Commodity: Tungsten

Lat, Long: 39.9639, -105.51250

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.


Satelite image of the Big Six Mine

Mine Description

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 Name

Primary: Big Six Mine


Commodity

Primary: Tungsten
Tertiary: Gold
Tertiary: Silver


Location

State: Colorado
County: Boulder


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

Not available


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

Not available


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): MINE MAP REPO # 402551, 405271 OWN/ LLOYD P MOCK


Colorado Mining Photos

Placer mines at Cripple Creek, Colorado ca. 1892

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.