Dark Horse Mine

The Dark Horse Mine is a gold mine located in Powell county, Montana at an elevation of 7,881 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: Dark Horse Mine  

State:  Montana

County:  Powell

Elevation: 7,881 Feet (2,402 Meters)

Commodity: Gold

Lat, Long: 46.30028, -112.99444

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 Dark Horse Mine

Dark Horse Mine MRDS details

Site Name

Primary: Dark Horse Mine


Commodity

Primary: Gold
Secondary: Copper
Secondary: Silver


Location

State: Montana
County: Powell
District: Racetrack (Danielsville) District


Land Status

Land ownership: National Forest
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

Not available


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1931
Year Last Production: 1940
Discovery Year: 1918
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Flint Creek Range


Mineral Deposit Model

Not available


Orebody

Form: LENS


Structure

Type: R
Description: Mount Powell Batholith

Type: L
Description: Racetrack Pluton


Alterations

Alteration Type: L
Alteration Text: Oxidation


Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cambrian

Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cambrian


Analytical Data

Analytical Data: 1 OZ/TON AU, 0.5 OZ/TON AG.


Materials

Ore: Gold
Gangue: Quartz
Gangue: Limonite


Comments

Comment (Deposit): VEINLIKE LODES IN THE LIMESTONE NEAR AND APPROXIMATELY PARRALLEL TO THE CONTACT WITH INTRUSIVE ROCK. MANGANESE OXIDE HAS FORMED SMALL REPLACEMENT LENSES AND LODES IN THE LIMESTONE.

Comment (Workings): ADITS, SHALLOW SHAFTS, INACESSIBLE IN 1965, MILL 1 MILE E OF MINE ON GRANITE CREEK

Comment (Location): HEAD OF SMALL TRIBUTARY OF RACETRACK CR ON ROAD OUT OF SPRING. ; INFO FROM LAND.ST :(1971)


References

Reference (Deposit): MBMG BULL 84, P. 48.

Reference (Deposit): MBMG BULL 98, P. 25, 61.

Reference (Production): MBMG BULL 98, P. 61.


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.