The Piegan-Gloster Mine is a silver and gold mine located in Lewis and Clark 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.
Piegan-Gloster Mine MRDS details
Site Name
Primary: Piegan-Gloster Mine
Commodity
Primary: Silver
Primary: Gold
Secondary: Copper
Location
State: Montana
County: Lewis and Clark
District: Marysville District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Year: 1942
Time Period: 1906-1942
Mined: 288000.000 mt
Material type: ore
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Polymetallic veins
Operation Type: Unknown
Years of Production:
Organization:
Significant: Y
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Not available
Structure
Type: R
Description: Boulder Batholith
Type: L
Description: Marysville Stock
Alterations
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
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
Analytical Data
Not available
Materials
Ore: Gold
Gangue: Quartz
Gangue: Pyrite
Gangue: Calcite
Comments
Comment (Location): NEAR THE HEAD OF PIEGAN GULCH.
Comment (Other Database): RECORD NUMBER 719 IS A POTENTIAL DUPLICATE OF THIS RECORD
Comment (Deposit): AT THE FACE OF TUNNEL THE VEIN NARROWS TO 1FT OF MASSIVE QUARTZ CONTAING SMALL STREAKS OF PYRITE.
Comment (Geology): POST MINERAL MOVEMENT
Comment (Workings): PIEGAN MINE HAD A TUNNEL WITH A WINZE 750 FT FROM THE PORTAL AND WAS SUNK TO A DEPTH OF 750 FT. GLOUSTER HAS A 1200 FT TUNNEL.
References
Reference (Production): USGS BULL 527, P. 76.
Reference (Deposit): USGS BULL 842, P. 63.
Reference (Deposit): USGS BULL 527, P. 75-76
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.
