Quatman Lease

The Quatman Lease is a uranium mine located in Jefferson county, Colorado at an elevation of 6,949 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

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.

Site Name

Primary: Quatman Lease

Commodity

Primary: Uranium

Location

State: Colorado
County: Jefferson
District: Idledale District

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
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1955
Year Last Production: 1960
Discovery Year: 1955
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: Denver Basin, Front Range Uplift

Type: L
Description: Junction Ranch Fault, Cherry Gulch Fault, Bear Creek Shear Zone

Alterations

Not available

Rocks

Name: Gneiss
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Gneiss
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic

Analytical Data

Not available

Materials

Ore: Pitchblende
Ore: Uraninite

Comments

Comment (Deposit): ALTHOUGH NO DETAILS OF DEPOSIT ARE AVAILABLE, IT IS PROBABLY SIMILAR TO THAT AT GRAPEVINE MINE, PRINCIPAL VEINS LIE IN JUNCTION RANCH FAULT ZONE CLOSE TO ITS INTERSECTION WITH CHERRY GULCH FAULT. VEINS STRIKE NW AND DIP 20 TO 60 NE AND CUT PREDOMINANTLY BIOTITE-QUARTZ GNEISS. GRAPEVINE WORKINGS MAINLY ON EAST VEIN AND SECONDARILY ON TARGET VEIN, BOTH VEINS APPARENTLY BRANCHES IN FOOTWALL OF WNW-STRIKING FAULT. LENTICULAR URANIUM ORE BODIES ARE 1 TO 2 FT WIDE. PITCHBLENDE COATS FRACTURES AND ALTERED BRECCIA FRAGMENTS. STRUCTURAL ZONE ON JUNCTION RANCH FAULT CAN BE INTERPRETED SIMILAR TO BRECCIA REEFS IN RALSTON CREEK DISTRICT TO NORTH.

Comment (Workings): 130-FT ADIT

Comment (Location): ALONG SAWMILL GULCH NEAR GRAPEVINE MINE ; INFO FROM LAND.ST :(1976)

Comment (Development): IN 1955 AND 1960, 12 TONS ORE MINED AT 0.16% U308 YIELDING 39 LB U308. PRODUCTION FIGURE HAS BEEN INCLUDED IN PRODUCTION TABLE FOR GRAPEVINE MINE

References

Reference (Deposit): NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: COLORADO GEOL SURVEY BULL. 40, P. 194

Reference (Deposit): SCOTT, GLENN R., 1972, GEOLOGIC MAP OF THE MORRISON QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAPI-790-A, 1:24,000.

Reference (Deposit): KING, R.U., 1964, GRAPEVINE MINE, IN SIMS, P.K., AND SHERIDAN, D.M., GEOLOGY OF URANIUM DEPOSITS IN THE FRONT RANGE, COLORADO: USGS BULL. 1159, P. 99-100

Reference (Deposit): GABLE, D.J., 1968, GEOLOGY OF THE CRYSTALLINE ROCKS IN THE WESTERN PART OF THE MORRISON QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS BULL. 1251-E

Colorado Mining Photos

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