The Gray Eagle Mine is a silver, lead, copper, and zinc mine located in Jefferson county, Montana at an elevation of 6,601 feet.
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
Elevation: 6,601 Feet (2,012 Meters)
Commodity: Silver, Lead, Copper, Zinc
Lat, Long: 46.31333, -112.19889
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.
Gray Eagle Mine MRDS details
Site Name
Primary: Gray Eagle Mine
Commodity
Primary: Silver
Primary: Lead
Primary: Copper
Primary: Zinc
Secondary: Gold
Tertiary: Antimony
Tertiary: Arsenic
Tertiary: Uranium
Tertiary: Molybdenum
Location
State: Montana
County: Jefferson
District: Basin (Cataract, Comet) District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: R. H. Mills,
Home Office: Spokane Washington
Owner Name: Mills, H.
Home Office: Boulder, Mt.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1902
Discovery Year: 1891
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Form: SHOOTS
Structure
Type: R
Description: Boulder Batholith, South-Trending Syncline In Elkhorn Mountains Volcanics
Type: L
Description: Comet - Gray Eagle Shear Zone, Roof Pendant Of Elkhorn Mountains Volcanics
Alterations
Alteration Type: L
Alteration Text: Sericitization And Intense Alteration Of Quartz Monzonite
Rocks
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Analytical Data: SAMPLES OF WEATHERED RADIOACTIVE VEIN MATERIAL ASSAYED 2.2% URANIUM AND 40% EQUIVALENT URANIUM
Materials
Ore: Tetrahedrite
Ore: Chalcopyrite
Ore: Molybdenite
Ore: Galena
Ore: Sphalerite
Ore: Gold
Gangue: Quartz
Gangue: Pyrite
Gangue: Ankerite
Comments
Comment (Location): ON BISHOP CR ABOUT 1.75 MI W OF THE COMET MINE.
Comment (Commodity): ZN A LIABILITY INSTEAD OF AN ASSET
Comment (Production): PRODUCTION ABOVE DOES NOT INCLUDE 1913, 1914, 1921. AFTER 1930 PRODUCTION INCLUDED WITH COMET MINE.
Comment (Deposit): MOST ORE CAME FROM TWO ORE BODIES ON NORTH VEIN, ONE WAS 10-15 FT. WIDE, 70-120 FT. LONG AND HAD A VERTICAL EXTENT OF ABOUT 250 FT. THE OTHER ORE BODY WAS STOPED FROM THE 400 FT. LEVEL TO THE SURFACE VEIN SYSTEM IS COMPOSED OF 2 MAIN VEINS ABOUT 30 M APART AND MANY SMALLER VEINS WITHIN A WIDE ALTERED ZONE.
Comment (Workings): IN 1905 THE MINE HAD 3 ADITS AGGREGATING 3400 FT. IN 1927 THE OLD TUNNEL WAS REPAIRED AND 1500 FT OF DEVELOPMENT WAS DONE. IN 1929 THE MINE WAS OPENED BY A 400 FT ADIT AND A VERTICAL WINZE FROM THE ADIT LEVEL TO THE 600 FT LEVEL. 3000 FT OF DEVELOPMENT WAS COMPLETED. 1930 5000 FT OF DRIFTS, CROSSCUTS, AND RAISES WERE RUN. THE MINE HAS 4 ADITS RANGING IN LENGTH FROM 480 TO 3000 FT. 2 ADDITIONAL LEVELS ARE OPENED BELOW THE LOWER MAIN ADIT BY A 250 FT SHAFT. ALL ADIT PORTALS ARE CAVED (1950).
References
Reference (Deposit): MBMG BULL-16, P. 29-30
Reference (Deposit): USGS BULL 527, P. 121
Reference (Deposit): USGS BULL 842, P. 287-89.
Reference (Deposit): USGS PP 428, P. 40, 42, 53, 54, 84, 86.
Reference (Deposit): MBMG BULL 7.
Reference (Deposit): MBMG BULL 10, P. 25
Reference (Production): MBMG BULL 16, P. 30
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.
