O'Brien Mine

The O'Brien Mine is a gold and silver mine located in Granite 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: O'Brien Mine  

State:  Montana

County:  Granite

Elevation:

Commodity: Gold, Silver

Lat, Long: 46.00472, -113.65972

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 O'Brien Mine

O'Brien Mine MRDS details

Site Name

Primary: O'Brien Mine
Secondary: Hidden Lead


Commodity

Primary: Gold
Primary: Silver
Secondary: Lead
Tertiary: Chromium
Tertiary: Antimony


Location

State: Montana
County: Granite
District: Frog Pond Basin 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

Type: Surface/Underground


Ownership

Owner Name: F. H. Burton


Production

Not available


Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1925
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

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


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Not available


Alterations

Not available


Rocks

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

Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

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

Name: Granite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic


Analytical Data

Not available


Materials

Ore: Chalcopyrite
Gangue: Quartz
Gangue: Pyrite


Comments

Comment (Location): 5.5 KM SSW OF GREEN CANYON LAKE. ON HILL SE OF FROG POND BASIN. ; INFO FROM LAND.ST :(1978)

Comment (Deposit): VEIN CONTAINS BOXWORK STRUCTURES, DRUSY QUARTZ, EPIDOTE, SOME METALLIC BANDING.

Comment (Workings): 3 LOCATIONS: MAIN O'BRIEN HAS A CAVED SHAFT, 50-60 FT DEEP AND 2 CAVED ADITS; O'BRIEN WEST HAS 7 PITS, 1 TRENCH CAVED ADIT, 2 CAVED SHAFTS; O'BRIEN NW HAS 15 PITS, 2 TRENCHES CAVED ADIT, AND A 20 FT SHAFT.

Comment (Deposit): DISTURBED AREA 0.5 ACRES ; INFO.SRC : 3 FIELD OBSERV


References

Reference (Deposit): FS FIELD REPORT


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.