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
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.
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
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.
