Blue Grass Mine

The Blue Grass Mine is a gold and silver mine located in Beaverhead county, Montana at an elevation of 6,001 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: Blue Grass Mine  

State:  Montana

County:  Beaverhead

Elevation: 6,001 Feet (1,829 Meters)

Commodity: Gold, Silver

Lat, Long: 45.15972, -112.97389

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 Blue Grass Mine

Blue Grass Mine MRDS details

Site Name

Primary: Blue Grass Mine


Commodity

Primary: Gold
Primary: Silver
Tertiary: Tellurium


Location

State: Montana
County: Beaverhead
District: Bannack District


Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.


Holdings

Not available


Workings

Type: Surface/Underground


Ownership

Owner Name: New York-Montana Co.
Years: 1942 -


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Contact Metasomatic
Operation Type: Unknown
Year First Production: 1863
Discovery Year: 1863
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Pioneer Mountains


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Type: L
Description: Overthrust Fault Zone Is Exposed In Mine. Dike Trends N50e; 60n.


Alterations

Alteration Type: L
Alteration Text: Garnetization, Oxidation


Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene

Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Mississippian

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Mississippian


Analytical Data

Not available


Materials

Ore: Tetradymite
Gangue: Calcite
Gangue: Pyrite
Gangue: Specularite
Gangue: Epidote
Gangue: Quartz
Gangue: Garnet


Comments

Comment (Deposit): REPLACEMENT VEINS AVERAGE 1 METER IN WIDTH AND LOCALLY ATTAIN 5 METERS. VEINS ARE NOT CONTINUOUS ALONG THE CONTACT.

Comment (Workings): ORE ALONG CONTACT WAS MINED FROM AN OPEN CUT 40 METERS LONG AND 7 METERS WIDE.

Comment (Development): BLUE GRASS AND GOLD BUG CLAIMS WERE PATENTED ON GROUND ORIGINALLY OCCUPIED BY THE DAKOTA CLAIMS


References

Reference (Deposit): MBMG BULL 6, P. 42-43.

Reference (Deposit): MBMG BULL 85, P. 81-83.

Reference (Deposit): 1931 COMPILE M.B.M.G. BULL. 6

Reference (Deposit): 1972 COMPILE M.B.M.G. BULL. 85


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.