The Jib Group is a copper, silver, gold, and lead mine located in Jefferson county, Montana at an elevation of 5,440 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: 5,440 Feet (1,658 Meters)
Commodity: Copper, Silver, Gold, Lead
Lat, Long: 46.27083, -112.26833
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.
Jib Group MRDS details
Site Name
Primary: Jib Group
Secondary: Hope-Katie
Secondary: Katie Extension
Commodity
Primary: Copper
Primary: Silver
Primary: Gold
Primary: Lead
Secondary: Zinc
Tertiary: Tellurium
Tertiary: Antimony
Location
State: Montana
County: Jefferson
District: Basin (Cataract, Comet) District
Land Status
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.
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Sylvanite, Inc.,
Home Office: 43 E. Broadway, Butte, MT 59701
Owner Name: Lbm Construction, 1816 Lafayette, Butte, Mt 59701
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1890
Discovery Year: 1870
Discovery Method: Unknown
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
Type: L
Description: Vein Cut By Dike And By N 25 W-Trending Fault With About 250 M Left Lateral Separation
Alterations
Not available
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: Pliocene
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Tetrahedrite
Ore: Galena
Ore: Sphalerite
Ore: Gold
Gangue: Quartz
Gangue: Ankerite
Gangue: Pyrite
Gangue: Rhodochrosite
Comments
Comment (Production): MINING INTERMITTANT FROM 1905-1956.
Comment (Deposit): VEIN IS COMPOSED CHIEFLY OF QUARTZ AND PYRITE BUT CONTAINS SPHALERITE, GALENA,CHALCOPYRITE AND TETRAHEDRITE WHICH REPLACE OLDER QUARTZ AND PYRITE OR RECEMENTS THEM WHERE FRACTURED OR BRECCIATED. OCCURING IN SMALL IRR. VEINLETS ARE YOUNGER MIN., A TELLURIDE OF AU AND AG AND NATIVE AU IN AGANGUE OF FINE GRAINED QUARTZ. ORE SHOOT ARE LARGER AND EXTEND DEEPER AS THE E END OF THE KATIE MINE IS APPROACHED. IT HAS 2 DISTINCT VEINS.
Comment (Workings): MINES ON VEIN OFFSET BY NORTHWEST-TRENDING FAULT. HOPE AND KATIE SHAFTS ON SOUTHERN SEGMENT AND KATIE EXTENSION ON NORTHERN SEGMENT. HOPE AND KATIE SHAFTS STARTED ABOUT 1893. NORTHERN SEGMENT DEVELOPED BY EAST KATIE EXTENSION AND WHITE ELEPHANT SHAFTS BEGUN ABOUT 1923 AND AN UNNAMED SHAFT SUNK IN 1955. 1923 300-TON MILL EQUIPPED FOR GRAVITY CONCENTRATION AND FLOATION WAS BUILT.
Comment (Reserve-Resource): VEIN HAS DIMENSIONS ABOUT 2000 FT. LONG BY 20 FT. WIDE MINED TO A DEPTH OF 500 FT. GIVING ABOUT 2,000,000 ST. MINERALIZED GROUND. TOTAL OF ABOUT 250,000 ST ORE HAS BEEN MINED FROM RICHER PORTIONS OF VEIN. ASSUMING AN ADDITIONAL 200,000 ST COULD BE RECOVERED FROM THE UPPER WORKINGS AND ASSUMING THAT THE VEIN COULD BE MINED AN ADDITIONAL 100 FT. IN DEPTH GIVES RESOURCES OF ABOUT 500,000 ST. ABOUT 2/3 OF THE HOPE-KATIE PORTION HAS BEEN STOPED TO THE 500 LEVEL; NO STOPES HAVE BEEN SHOWN BELOW THE 500 LEVEL.
Comment (Location): NW PART OF BASIN. ; INFO FROM LAND.ST :(1954)
Comment (Development): 15 CLAIMS: AVALANCHE, ATLANTIC, NELLIE, FAIR PLAY, LOTTA, JIB MILL SITE, DARWIN, APACHE CHIEF, EUREKA, PRESIDENT, FRACTION, HOPE.
References
Reference (Production): MBMG BULL 16, P. 32.
Reference (Deposit): MBMG BULL 100, P. 10.
Reference (Deposit): USGS BULL 1151, P. 105.
Reference (Deposit): USGS BULL 842, P. 290.
Reference (Deposit): MBMG BULL 16, P. 31-2.
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.
