International Molybdenum Mine

The International Molybdenum Mine is a molybdenum mine located in Boundary county, Idaho at an elevation of 6,099 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: International Molybdenum Mine  

State:  Idaho

County:  Boundary

Elevation: 6,099 Feet (1,859 Meters)

Primary Mineral: Molybdenum

Lat, Long: 48.8675, -116.83530

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 International Molybdenum Mine

International Molybdenum Mine MRDS details

Site Name

Primary: International Molybdenum Mine
Secondary: Boundary County Deposit
Secondary: Cow Creek
Secondary: Rideout


Primary: Molybdenum
Tertiary: Nickel
Tertiary: Cobalt
Tertiary: Platinum


State: Idaho
County: Boundary
District: Porthill District

Land Status

Land ownership: State
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.


Not available


Type: Surface/Underground


Owner Name: International Molybdenum Co. ( 1938 )


Not available


Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Year First Production: 1938
Discovery Method: Unknown
Years of Production:
Significant: N
Deposit Size: S


General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Selkirk Range

Mineral Deposit Model

Not available




Type: L
Description: Great Numbers Of Joint Plane Cracks


Alteration Type: L
Alteration Text: Oxidation


Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Analytical Data

Not available


Ore: Molybdenite
Ore: Molybdite
Gangue: Quartz


Comment (Location): In Phoebe Tip Country

Comment (Development): 4 Unpatented Claims

Comment (Workings): Equipment: 2 Cabins, Hand Mining Equipment


Reference (Deposit): U.S.Bureau Of Mines, Wfoc, Mineral Property File 0160210014.

Reference (Production): Hubbard, C.R., 1955 , Idaho Bureau Of Mines And Geology Pamphlet 105 , P. 50

Reference (Deposit): Kirkham, Virgil R. D., And Ellis, Ernest W., 1926, Geology And Ore Deposits Of Boundary County, Idaho: Idaho Bureau Of Mines And Geology Bulletin, No. 10, 78 P.

Reference (Deposit): Hubbard, C.R., 1955 , A Survey Of The Mineral Resources Of Idaho: Idaho Bureau Of Mines And Geology Pamphlet 105 , 56 P.

Reference (Deposit): King, R.U., 1964 , Mineral Resources - Molybdenum, In Mineral And Water Resources Of Idaho: Idaho Bureau Of Mines And Geology Spec. Rept. No. 1 , P. 133 - 138

Reference (Deposit): 1926 Geolmap Idaho Bureau Of Mines & Geol. Bulletin 10

Reference (Deposit): 1955 Compile Idaho Bureau Of Mines And Geology Pamphlet 105

Reference (Deposit): 1964 Compile Idaho Bureau Of Mines And Geology Spec. Rept. No. 1

Idaho Gold

Where to Find Gold in Idaho

"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more at Where to Find Gold in Idaho.