Jib Group

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

Name: Jib Group  

State:  Montana

County:  Jefferson

Elevation: 5,440 Feet (1,658 Meters)

Primary Mineral: 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.


Satelite image of the Jib Group

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.


Colorized Mining Photos

Drumlummon Mine at Marysville, Montana late 1880s

Western Mining History's collection of colorized mining photos includes incredible scenes from Montana: Best Historical Photos: Colorized Mining Scenes.