Dexter Mine

The Dexter Mine is a lead and silver mine located in Beaverhead county, Montana at an elevation of 6,900 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: Dexter Mine

Commodity

Primary: Lead
Primary: Silver

Location

State: Montana
County: Beaverhead
District: Argenta District

Land Status

Land ownership: BLM Administrative Area
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: Henry Meine
Home Office: Dillon
Years: 1958 -

Owner Name: Continental Divide Mines Co.
Years: 1931 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
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

Type: L
Description: Breccia Zone, Faults, Quartz Monzonite Stock

Alterations

Not available

Rocks

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

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Analytical Data

Not available

Materials

Ore: Tetrahedrite
Ore: Galena
Gangue: Garnet
Gangue: Calcite
Gangue: Pyrite

Comments

Comment (Deposit): VEINS IN SHALE NOT FAR FROM INTRUSIVE CONTACT.

Comment (Workings): SEVERAL SHAFTS, INCLUDING ONE TO 317 FEET, WITH A CONNETING, 260-FT ADIT.

Comment (Production): PRODUCTION YEARS INCLUDE 1880'S, 1925, 1932 AND 1936, BUT FIGURES ARE CONFIDENTIAL.

References

Reference (Deposit): MBMG BULL 6, P. 74.

Reference (Deposit): MBMG BULL 85, P. 47.

Reference (Deposit): USGS OFR 79-1426, P. 22.

Reference (Deposit): MEYERS, W.B., 1952, GEOL. MAP OF NW 1/4 OF WILLIS QUAD., BEAVERHEAD CO., MT: U.S.G.S. OPEN FILE REPORT.

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

Reference (Deposit): 1952 GEOLMAP MEYERS, W.B., U.S.G.S. NW WILLIS QUAD

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

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.