Monaghan Molybdenum Prospect

The Monaghan Molybdenum Prospect is a molybdenum and copper mine located in Beaverhead county, Montana at an elevation of 8,799 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: Monaghan Molybdenum Prospect

Commodity

Primary: Molybdenum
Primary: Copper

Location

State: Montana
County: Beaverhead
District: Pioneer Mountains

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

Not available

Ownership

Owner Name: Dewey Long, F. Monaghan
Home Office: Butte, Mt.
Years: 1943 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Pioneer Mountains

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Analytical Data

Analytical Data: DEPOSIT IS FROM 0.08 TO 0.12% MOS2, AND 0.02% CU.

Materials

Ore: Molybdenite
Gangue: Pyrite
Gangue: Quartz

Comments

Comment (Location): 1 MI. DUE N. OF PEAR LAKE IN BEAVERHEAD NF. 45 MI SW OF BUTTE.

Comment (Geology): GEOL.DESC: IN GREISEN. BLEBS, BLOWOUTS OF QUARTZ UP TO 14 FT. WIDE.

Comment (Deposit): LOW GRADE ; INFO.SRC : 1 PUB LIT

Comment (Deposit): MOLYBDENITE OCCURS IN QUARTZ VEINS AND BLEBS AND IN THE GREISEN EITHER AS BUNCHES OR ROSETTES, OR AS DISSEMINATED CRYSTALS.

References

Reference (Deposit): MBMG BULL 85, P. 93.

Reference (Deposit): USGS BULL 1162-E, P. 62.

Reference (Deposit): 1943 RECON CREASEY AND SCHOLZ, U.S.G.S. BULL. 1182-

Principal Gold Districts of Montana

In Montana, 54 mining districts have each have produced more than 10,000 ounces of gold. The largest producers are Butte, Helena, Marysville, and Virginia City, each having produced more than one million ounces. Twenty seven other districts are each credited with between 100,000 and one million ounces of gold production. Read more: Principal Gold Districts of Montana.