Iron Mask Mine

The Iron Mask Mine is a lead, silver, and copper mine located in Beaverhead county, Montana at an elevation of 6,601 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: Iron Mask Mine

Commodity

Primary: Lead
Primary: Silver
Primary: Copper
Secondary: Zinc

Location

State: Montana
County: Beaverhead
District: Blue Wing 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

Type: Underground

Ownership

Owner Name: Constance Crawford

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
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

Alteration Type: L
Alteration Text: Oxidation

Rocks

Name: Diorite
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous

Analytical Data

Not available

Materials

Gangue: Calcite
Gangue: Quartz

Comments

Comment (Production): ACTUAL PRODUCTION FIGURES ARE CONFIDENTIAL

Comment (Development): ONE PATENTED CLAIM

Comment (Deposit): WELL DEFINED VEINS EXPOSED AT SURFACE. OXIDIZED ORE NEAR SURFACE BUT SULFIDES ARE REPORTED AT DEPTH. VEIN ON SURFACE RESEMBLES THE DEL MONTE VEINS.

Comment (Workings): ONE SHAFT, REPORTEDLY 200-FT DEEP.

Comment (Geology): GEOL.DESC: MN, FE OXIDES; CALCITE AND QUARTZ GANGUE.

References

Reference (Deposit): MBMG BULL 85, P. 101.

Reference (Deposit): 1931 COMPILE M.B.M.G. BULL. 6

Reference (Deposit): 1965 GEOLMAP LOWELL, W.R., U.S.G.S. MAP I-433

Reference (Deposit): 1979 RECON BERGER, B.R., U.S.G.S. OPEN-FILE 79-1426

Reference (Deposit): MBMG BULL 6, P. 38-39.

Reference (Deposit): USGS MGI I-433

Reference (Deposit): BERGER, B.R., AND OTHERS, 1979, GEOCHEM. RECON.-MINING DISTRICTS IN SO. PIONEER MTNS., MONTANA: U.S.G.S. OPEN-FILE REPORT 79-1426, P. 13

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.