The East Grey Rock Mine is a 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.
East Grey Rock Mine MRDS details
Site Name
Primary: East Grey Rock Mine
Commodity
Primary: Copper
Secondary: Silver
Secondary: Zinc
Tertiary: Arsenic
Location
State: Montana
County: Silver Bow
District: Butte District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
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
Not available
Structure
Type: R
Description: Boulder Batholith
Alterations
Alteration Type: L
Alteration Text: Hydrothermal
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
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Covellite
Ore: Chalcopyrite
Ore: Chalcocite
Ore: Bornite
Ore: Sphalerite
Ore: Enargite
Gangue: Quartz
Gangue: Pyrite
Comments
Comment (Production): AMOUNT OF PRODUCTION UNKNOWN
Comment (Deposit): THIS MINE HAS THE COVELLITE, SISTERS, DERNIER, VALE, AND GREYROCK VEINS. THE SISTERS VEIN HAS A DIP OF 60 S. VALE VEIN IS UNDER GREYROCK VEIN. THE DERNIER RUNS PARALLEL TO COVELLITE VEIN. COVELLITE VEIN'S STRIKE NW. SISTER'S VEIN IS 3-5 FT, STRIKE N 50 W, DIP 61 S.
References
Reference (Deposit): USGS PP 74, P. 181-82, 183-84, PL. X
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.
