Greenstone Mine

The Greenstone Mine is a copper and silver mine located in Beaverhead county, Montana at an elevation of 7,113 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

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.

Site Name

Primary: Greenstone Mine

Commodity

Primary: Copper
Primary: Silver
Secondary: Gold
Secondary: Tungsten

Location

State: Montana
County: Beaverhead
District: Birch Creek (Utopia) 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: G. W. Farlin
Years: 1972 -

Owner Name: C. Kennedy
Home Office: Dillon
Years: 1972 -

Production

Year: 1950
Material type: ORE
Description: Ap_Grade: ^1.2% Wo3

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
Physiographic Detail: Pioneer Mountains

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: L
Description: Humbolt Mtn. Anticline-East Flank, Pioneer Batholith

Alterations

Alteration Type: L
Alteration Text: Gouge, Oxidation

Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock Unit
Age Young: Pennsylvanian

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Pennsylvanian

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Analytical Data

Not available

Materials

Ore: Scheelite
Ore: Powellite
Gangue: Garnet
Gangue: Epidote
Gangue: Quartz
Gangue: Talc
Gangue: Calcite

Comments

Comment (Geology): SCHEELITE CRYSTALS ARE UP TO 8.3 MM LONG. ; GEOL.DESC: OXIDIZED CU ORE ALSO PRESENT

Comment (Workings): EARLY WORKINGS CONSIST OF A 240-FOOT SHAFT WITH 176 FEET OF DRIFTING AND 2 ADITS. 1951 TUNGSTEN EXPLORATION INVOLVED EXCAVATING 13 BULLDOZER CUTS

Comment (Location): NW 1/4, SE 1/4, SECT. 11

Comment (Development): EARLY MINING WAS FOR COPPER. IN 1950 MINERALS EXPLORATION CO. BUILT AN ACCESS ROAD FROM WILLOW CR FOR TUNGSTEN EXPLORATION.

Comment (Deposit): TACTITE EXPOSED 480 FEET SOUTH OF GREENSTONE GULCH AND 340 FEET TO THE NORTH. WIDTH ALONG DIP VARIES FROM 25 TO 180 FEET AND AVERAGES 140 FEET. MINERALIZED NW TO NE TRENDING SHEAR ZONES

References

Reference (Deposit): USGS BULL 574, P. 63.

Reference (Deposit): USBM RI 5552, P. 19-22.

Reference (Deposit): MBMG BULL 85, P. 89-91.

Reference (Deposit): 1914 RECON WINCHELL, A.N., U.S.G.S. BULL 574

Reference (Deposit): 1960 RECON U.S. BUREAU OF MINES, R.I. 5552

Reference (Deposit): 1972 COMPILE M.B.M.G. BULL. 82

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.