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
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.
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
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.
