Free Coinage Mine

The Free Coinage Mine is a silver and lead mine located in Jefferson county, Montana.

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: Free Coinage Mine  

State:  Montana

County:  Jefferson

Elevation:

Primary Mineral: Silver, Lead

Lat, Long: 46.48611, -112.03250

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 Free Coinage Mine

Free Coinage Mine MRDS details

Site Name

Primary: Free Coinage Mine
Secondary: Little Alma Mine


Commodity

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


Location

State: Montana
County: Jefferson
District: Clancy-Lump Gulch District


Land Status

Not available


Holdings

Not available


Workings

Type: Underground


Ownership

Owner Name: Louise Tomlinson
Home Office: Danbury, Conn.

Owner Name: Amalgamated Silver Co.


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


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Type: R
Description: Boulder Batholith


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
Age Young: Late Cretaceous

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


Analytical Data

Analytical Data: 5% LB, 11% ZN.
Analytical Data: A LITTLE AU. BEFORE 1900: 125OZ/TON AG
Analytical Data: 8% LB
Analytical Data: ORE BETWEEN 1918-20 CONTAINED: 70 OZ/TON AG


Materials

Ore: Gold


Comments

Comment (Workings): 2 VERTICAL SHFTS, DRIFTS. WORKINGS ARE NOW CAVED. IT WAS WORKED 2 DIFFERENT TIMES BEFORE 1900, A VERTICAL SHAFT WAS PUT IN BOTH TIMES.

Comment (Location): E SIDE OF LUMP GULCH.

Comment (Geology): W OF FREE COINAGE ACROSS 2000FT OF ALLUVIUM IN LUMP GULCH IS AN IRON-STAINED BRECCIA ZONE ABOUT 1500FT LONG AND ABOUT 50FT WIDE CONTAINING SOME CHALCEDONY. IT PROBALLY IS THE W EXTENSION OF THE FREE COINAGE VEIN.


References

Reference (Deposit): MBMG BULL 16, P. 41-2.

Reference (Deposit): USGS PP 428, P. 63, 64, 66.

Reference (Production): MBMG BULL 16, P. 42


Colorized Mining Photos

Drumlummon Mine at Marysville, Montana late 1880s

Western Mining History's collection of colorized mining photos includes incredible scenes from Montana: Best Historical Photos: Colorized Mining Scenes.