The Boulder Mine is a silver, gold, and zinc mine located in Jefferson 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.
Primary Mineral: Silver, Gold, Zinc
Lat, Long: 46.27889, -112.28833
Map: View on Google Maps
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.
Boulder Mine MRDS details
Primary: Boulder Mine
District: Basin (Cataract, Comet) District
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.
Owner Name: James Bragg
Owner Name: James P. Bragg
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1881
Years of Production:
Deposit Size: S
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Description: Fault Zone Trends N75w, Dips 70-85 S
Alteration Type: L
Alteration Text: Oxidized (Oxidation Of Sulfide Minerals)
Name: Quartz Monzonite
Age Type: Associated Rock
Age Young: Pliocene
Name: Quartz Monzonite
Age Type: Host Rock
Age Young: Late Cretaceous
Comment (Deposit): 3 OR MORE FISSURE VEINS. VEIN HAS BEEN INTRUDED AND SPLIT ALONG ITS STRIKE BY A QUARTZ LATITE DIKE ABOUT 500 FT LONG AND 50 FT THICK.
Comment (Commodity): ORE DESCRIBED AS HEMATITE CONTAINING AURIFEROUS PYRITE AND "FREE GOLD"
Comment (Location): ON SE SLOPE OF POLE MT. ; INFO FROM LAND.ST :(1954)
Comment (Production): PRODUCING 1961.
Comment (Development): FORMERLY OWNED BY THE BASIN GOLD FIELDS, LTD.
Comment (Workings): TWO ADITS, DRIFTS AND CROSSCUTS: MOST WORKING ACCESSIBLE IN 1960 WORKINGS EPLORE THE DEPOSIT THROUGH A HORZONTAL RANGE OF 1300 FT AND A VERTICLE RANGE OF 160 FT. SOME TRENCHES.
Reference (Deposit): MBMG BULL 16, P. 22, 24, 100.
Reference (Deposit): USGS BULL 1151, P. 100, PL. 1.
Reference (Deposit): MBMG BULL 33, P. 13
Reference (Production): MBMG BULL 16, USGS BULL 1151.
Colorized Mining Photos
Western Mining History's collection of colorized mining photos includes incredible scenes from Montana: Best Historical Photos: Colorized Mining Scenes.