Dark Horse Mine

The Dark Horse Mine is a gold, silver, and copper mine located in Beaverhead county, Montana at an elevation of 9,101 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: Dark Horse Mine
Secondary: Darkhorse

Commodity

Primary: Gold
Primary: Silver
Primary: Copper
Secondary: Lead
Secondary: Zinc

Location

State: Montana
County: Beaverhead
District: Beaverhead Range

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: Underground

Ownership

Owner Name: Cannon, Laura
Home Office: Fallbrook, Ca
Years: 1972 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
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: Beaverhead Mountains

Mineral Deposit Model

Not available

Orebody

Form: STRINGERS

Structure

Not available

Alterations

Not available

Rocks

Name: Quartzite
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Analytical Data

Analytical Data: 30% CU PLUS AU AND AG VALUES

Materials

Ore: Bornite
Ore: Chalcopyrite
Gangue: Quartz
Gangue: Limonite
Gangue: Hematite
Gangue: Malachite

Comments

Comment (Location): 1/2 MILE NW OF DARK HORSE LAKE

Comment (Production): INCOMPLETE PRODUCTION DATA-PRODUCTION IN 1906 WAS AN ADDITIONAL 12 ST/ORE PER WEEK.

Comment (Development): IN 1909 AND LATER, A LONG TUNNEL WAS DRIVEN THROUGH THE DIVIDE TO ALLOW ORES TO BE SHIPPED TO THE LEMHI VALLEY. ; ECON.COM: HIGH ALTITUDE

Comment (Deposit): WEAK BEDDING-PLANE QUARTZ VEIN 1 TO 2 FT. WIDE IS EXPOSED IN 2 ADITS 200 FT. NORTH OF THE MAIN SHAFT. BEDDING TRENDS N62W, 35 SW

Comment (Workings): WORKINGS CONSIST OF A TUNNEL 2935 FT. LONG, PENETRATING DIVIDE 800 FT. BELOW CREST; MAIN SHAFT SEVERAL HUNDRED FEET DEEP, AND THREE SHORT ADITS.

References

Reference (Deposit): USGS BULL. 528.

Reference (Deposit): BELL, ROBERT N., 1906, SEVENTH ANNUAL REPORT OF THE MINING INDUSTRY OF IDAHO FOR THE YEAR 1905, P. 88.

Reference (Deposit): USGS BULL 574, P. 77.

Reference (Deposit): MBMG BULL 85, P. 35.

Reference (Deposit): 1906 COMPILE IDAHO MINE - INSPECTOR'S ANNUAL REPORT FOR 1905

Reference (Deposit): 1913 GEOLMAP UMPLEBY; BULL. 528

Reference (Deposit): 1914 COMPILE WINCHELL; BULL. 574

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

Reference (Production): M.B.M.G. BULL. 85

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.