The Shamrock Mine is a lead and zinc 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.
Shamrock Mine MRDS details
Site Name
Primary: Shamrock Mine
Commodity
Primary: Lead
Primary: Zinc
Secondary: Copper
Secondary: Gold
Secondary: Silver
Location
State: Montana
County: Granite
District: Dunkleberg 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
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
Not available
Structure
Type: R
Description: Wasa-Shamrock Fault, Dunkleberg Anticline
Type: L
Description: Wasa-Shamrock Fault, Royal Stock
Alterations
Not available
Rocks
Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Limestone
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cretaceous
Analytical Data
Analytical Data: 4.75% ZN, 0.05% PB, 0.05-0.42% CU, TRACE AU AG.
Materials
Ore: Chalcopyrite
Ore: Galena
Ore: Sphalerite
Gangue: Pyrite
Comments
Comment (Location): INFO FROM LAND.ST :(1971)
Comment (Geology): THE ANTICLINE HAS A NORTHWARD TREND AND PLUNGE.
Comment (Deposit): FAULTED AND MINERALIZED ZONE WITH A DECREASE IN WIDTH TOWARD THE SOUTH. 2 SOUTH-TRENDING MINERALIZED OUTCROPS ARE FOUND SEPARATED WITH ARGILLITE.
References
Reference (Deposit): USBM RI 5014,P. 10, 12, FIG. 3, 10
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.
