Helena-Jefferson Mine

The Helena-Jefferson Mine is a silver, zinc, and lead mine located in Jefferson county, Montana at an elevation of 4,902 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: Helena-Jefferson Mine  

State:  Montana

County:  Jefferson

Elevation: 4,902 Feet (1,494 Meters)

Primary Mineral: Silver, Zinc, Lead

Lat, Long: 46.35694, -112.04583

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 Helena-Jefferson Mine

Helena-Jefferson Mine MRDS details

Site Name

Primary: Helena-Jefferson Mine


Commodity

Primary: Silver
Primary: Zinc
Primary: Lead
Secondary: Copper
Tertiary: Molybdenum


Location

State: Montana
County: Jefferson
District: Alahambra (Golconda) District


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Owner Name: Helena-Jefferson Mine Co.


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1928
Year Last Production: 1928
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: Associated Rock
Age Young: Late Cretaceous

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


Analytical Data

Not available


Materials

Ore: Galena
Ore: Alabandite
Ore: Rhodonite
Ore: Molybdenite
Ore: Chalcopyrite
Ore: Sphalerite
Gangue: Calcite
Gangue: Quartz
Gangue: Pyrite
Gangue: Rhodochrosite


Comments

Comment (Location): W SLOPE OF BEAVERTON CR.

Comment (Deposit): 6 VEINS ON PROPERTY BUT ONLY ONE (1928) WAS WORKED, THE HELENA VEIN. BETWEEN A HANGING WALL OF APLITE AND A FOOTWAL OF QUARTZ MONZONITE.

Comment (Workings): SEVERAL INCLINED SHAFTS, ONE 550 FT DEEP, AND A CROSSCUT TUNNEL.


References

Reference (Deposit): MBMG BULL-16, P. 51, 109.

Reference (Deposit): USGS BULL 842, P. 238-40.

Reference (Production): MBMG BULL 16, P. 109.

Reference (Deposit): USGS PP 428, PL. 1


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.