East Grey Rock Mine

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

Name: East Grey Rock Mine  

State:  Montana

County:  Silver Bow

Elevation:

Commodity: Copper

Lat, Long: 46.025, -112.52333

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 East Grey Rock Mine

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

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.