Green Rock Mine

The Green Rock Mine is a tungsten mine located in Larimer county, Colorado at an elevation of 6,040 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

Satelite View

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Site Name

Primary: Green Rock Mine

Commodity

Primary: Tungsten
Tertiary: Molybdenum

Location

State: Colorado
County: Larimer
District: Stove Prairie Area

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

Type: Underground

Ownership

Not available

Production

Year: 1942
Description: Ap_Grade: ^Approx 1% Wo3

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
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

Not available

Orebody

Not available

Structure

Type: R
Description: Front Range Uplift, Sherman Batholith

Type: L
Description: Poudre River Shear Zone, Skin Gulch Shear Zone

Alterations

Not available

Rocks

Name: Granite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Analytical Data

Not available

Materials

Ore: Powellite
Ore: Scheelite

Comments

Comment (Commodity): TWETO (1960) CITES MO (POWELLITE) GENERALLY OCCURRING WITH CACHE LA POUDRE RIVER AREA W DEPOSITS

Comment (Workings): 30-FT SHAFT, TWO SHORT ADITS

Comment (Location): ON WEST SIDE OF HEWLETT GULCH 1.8 MILES NW OF POUDRE PARK. ; INFO FROM LAND.ST :1980

References

Reference (Production): BELSER, 1956, P. 16.

Reference (Deposit): ABBOTT, J.T., 1976, GEOLOGIC MAP OF THE BIG NARROWS QUADRANGLE, LARIMER COUNTY, COLORADO: USGS MAP GQ-1323.

Reference (Deposit): TWETO, OGDEN, 1960, SCHEELITE IN THE PRECAMBRIAN GNEISSES OF COLORADO: ECON. GEOLOGY, V. 55, NO. 7, P. 1406-1428.

Reference (Deposit): BELSER, CARL, 1956, TUNGSTEN POTENTIAL IN CHAFFEE, FREMONT, GUNNISON, LAKE, LARIMER, PARK, AND SUMMIT COUNTIES, COLORADO: USBM IC-7748, P. 16.

Reference (Deposit): COBB, H.S., 1960, TUNGSTEN MINES OF COLORADO: COLORADO METAL MINING FUND BD., P. 37.

Colorado Mining Photos

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