Piegan-Gloster Mine

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

Name: Piegan-Gloster Mine  

State:  Montana

County:  Lewis and Clark

Elevation:

Primary Mineral: Silver, Gold

Lat, Long: 46.76194, -112.34083

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 Piegan-Gloster Mine

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