Modoc Mine

The Modoc Mine is a silver and copper mine located in Silver Bow 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: Modoc Mine  

State:  Montana

County:  Silver Bow

Elevation:

Commodity: Silver, Copper

Lat, Long: 46.025, -112.50833

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 Modoc Mine

Modoc Mine MRDS details

Site Name

Primary: Modoc Mine


Commodity

Primary: Silver
Primary: Copper
Secondary: Gold


Location

State: Montana
County: Silver Bow
District: Butte District


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Not available


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

Form: LENSES, SHOOTS


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: Pyritized


Rocks

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

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene


Analytical Data

Not available


Materials

Ore: Chalcocite
Ore: Bornite
Ore: Chalcopyrite
Gangue: Quartz
Gangue: Pyrite


Comments

Comment (Location): NORTH OF MEADERVILLE

Comment (Geology): THE RYOLITE PORPHYRY FORMS A SERIES OF DIKES, WHICH UNITE AT THE SURFACE, AT TIMES 100 FT WIDE.

Comment (Deposit): THE LODE IS A BANDED MIXTURE OF SOLID QUARTZ AND PYRITE WHICH IS WORKABLE ONLY WHERE BROKEN BY FAULTING AND ENRICHED BY SECONDARY GLANCE AND BORNITE. THE VEIN IS BROKEN BY NUMEROUS TRANSVERSE NW FISSURES. THE PAY ORE OCCURS IN SHOOTS

Comment (Workings): 2 SHAFTS


References

Reference (Deposit): USGS PP 74, P. 216


Principal Gold Districts of Montana

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.