The Bertha Mine is a copper and silver mine located in Jefferson county, Montana at an elevation of 4,764 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: 4,764 Feet (1,452 Meters)
Commodity: Copper, Silver
Lat, Long: 46.38028, -112.08722
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.
Bertha Mine MRDS details
Site Name
Primary: Bertha Mine
Secondary: Bertha Group
Commodity
Primary: Copper
Primary: Silver
Secondary: Lead
Secondary: Gold
Secondary: Zinc
Tertiary: Bismuth
Tertiary: Antimony
Location
State: Montana
County: Jefferson
District: Colorado (Corbin-Wickes) District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Glenore Mines, Inc.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year Last Production: 1917
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: IRREGULAR
Structure
Type: R
Description: Boulder Batholith
Alterations
Alteration Type: L
Alteration Text: Sericitization, Oxidation, Some Pyritization
Rocks
Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Analytical Data: $0.20/TON AU
Analytical Data: 1-10 OZ/TON AG
Analytical Data: 1-5%/TON CU
Materials
Ore: Bornite
Ore: Tetrahedrite
Ore: Gold
Ore: Chalcopyrite
Gangue: Pyrite
Gangue: Quartz
Comments
Comment (Development): 11 PATENTED CLAIMS: BERTHA, BERTHA 2, DAPHNE 2, C&M, C&B, FARVIEW, JACK RABBIT, CORBIN, D&E, HELENA, BOSTON FRACTION, JEFFERS. ; ECON.COM: MILL OPERATED AT MINE DURING 1907-1918 PERIOD
Comment (Workings): TWO SHAFTS, FIVE LEVELS, CROSSCUTS. SHAFT COLLAR IS 300FT BELOW SURFACE DISCOVERY OF THE MAIN VEIN. 1911 CONSTRUCTION WAS STARTED ON A 100-TON FLOATATION PLANT TO SUPPLEMENT A 200-TON GRAVITY CONCENTRATOR. 1917 FIRE DISTROYED THE CONCENTRATOR.
Comment (Geology): VEIN OXIDIZED TO DEPTHS OF 40 TO 100 FEET . MUCH POSTMINERAL MOVEMENT HAS OCCURED.
Comment (Location): NE SLOPE OF ALTA MT.
Comment (Production): PRODUCED CONTINUOUSLY FROM 1906-1918 EXCEPT 1910.
References
Reference (Deposit): MBMG BULL 16, P. 47-9.
Reference (Deposit): USGS BULL 842, P. 242.
Reference (Deposit): USGS BULL 527 P. 110-11.
Reference (Deposit): USGS PP 428, P. 78.
Reference (Production): MBMG BULL 16, P. 47
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.
