The Granite - Bimetallic Mine is a gold and silver mine located in Granite county, Montana at an elevation of 6,781 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: 6,781 Feet (2,067 Meters)
Commodity: Gold, Silver
Lat, Long: 46.31611, -113.24194
Map: View on Google Maps
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Granite - Bimetallic Mine MRDS details
Site Name
Primary: Granite - Bimetallic Mine
Secondary: Blaine Shaft
Secondary: Ruby Shaft
Secondary: Granite Mountain
Secondary: Granite Tailings
Commodity
Primary: Gold
Primary: Silver
Secondary: Copper
Secondary: Lead
Secondary: Zinc
Tertiary: Antimony
Tertiary: Arsenic
Location
State: Montana
County: Granite
District: Philipsburg (Granite-Flint Creek) 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: Frank, Peter, And William Antonioli, 724 S. Western Ave., Butte, Mt. 59701
Owner Name: Contact Mining Co., 724 S. Western Ave., Butte, Mt.
Production
Year: 1944
Time Period: 1883-1944
Material type: AU
Description: Cp_Grade: ^About 0.05 Oz/T
Year: 1944
Time Period: 1883-1944
Material type: CU
Description: Cp_Grade: ^About 0.01%
Year: 1944
Time Period: 1883-1944
Material type: AG
Description: Cp_Grade: ^About 45 Oz/T
Year: 1944
Time Period: 1883-1944
Mined: 910000.000 mt
Material type: ore
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Polymetallic veins
Operation Type: Unknown
Year First Production: 1882
Year Last Production: 1978
Discovery Year: 1872
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: Y
Deposit Size: M
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Flint Creek Range
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Form: TABULAR
Structure
Type: R
Description: Philipsburg Batholith
Type: L
Description: Philipsburg Anticline Philipsburg Overthrust
Alterations
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Analytical Data: VEIN CARRIES ON AVERAGE 44 OZ/TON AG. ANALYSIS OF MILL RUN: 75.70% SIO2, 4.30% FE, 4.40% S, 1.71% MN, 1.20% PB, 0.85% ZN, 0.14% CU, 0.5% MGO, 0.21% AS, 0.13% SB, 0.11% NA, 0.06% K, 0.1% CAO, 0.12% AU AND AG (36.12 OZ/TON AG, $1.60/TON AU).
Materials
Ore: Chrysocolla
Ore: Malachite
Ore: Galena
Ore: Cerargyrite
Ore: Silver
Ore: Pyromorphite
Ore: Proustite
Ore: Sphalerite
Ore: Tennantite
Ore: Tetrahedrite
Ore: Argentite
Ore: Gold
Ore: Chalcopyrite
Ore: Pyrargyrite
Gangue: Calcite
Gangue: Pyrite
Gangue: Stibnite
Gangue: Realgar
Gangue: Rhodochrosite
Gangue: Quartz
Gangue: Orpiment
Comments
Comment (Deposit): Discovery Year: 1872, 1875
Comment (Production): 1885-1892 - $20,000,000 IN SILVER AND GOLD MINED. 1883-1893 - $6,000,000 PRODUCED
Comment (Development): THE GRANITE MOUNTAIN & BIMETALLIC MINES WERE WORKED SEPARATELY UNTIL 1898 - SINCE THEN HAVE WORKED AS ONE; BOTH LOCATED ON SAME ORE BODY. MILL CAPACITY 50 T/D. OPERATOR OF GRANITE TAILINGS: JOE METESH, PHILIPSBURG, MT.
Comment (Geology): PRIMARY ORE IN LOWER PORTIONS OF MINE CARRIES 20-30 OZ/TON AG, $1.50-3.00/TON AU (1906); ENRICHED SULFIDE ORE UP TO SURFACE HAS 50-1000 OZ/TON AG, $4-8/TON AU. ENRICHED OXIDIZED ORE BETWEEN 100-400 FT LEVELS: 300-400 OZ/TON AG, $5-16/TON AU. POOR OXIDIZED ORE AT APEX OF VEIN, AG-AU HAS BEEN GREATLY LEACHED.
Comment (Reserve-Resource): ASSUMING A VEIN 4500 FT LONG BY 1500 FT DEEP BY 3 FT GIVES ABOUT 1,000,000 ST; THE AMOUNT ALREADY MINED. MINING AN ADDITIONAL 300 FT DOWN WOULD GIVE AN ADDITIONAL 200,000 ST WHICH IS BANISTER'S ESTIMATE OF RESOURCES FROM THE 1000 TO 1800 LEVEL. ASSUMING THAT THE VEIN CONTINUED 1500 FT AT A REDUCED LENGTH OF 3000 FT GIVES THE SECOND ESTIMATE OF 1,000,000 ST. GRADE PROBABLY DECREASES WITH DEPTH.
Comment (Location): LOCATION PLOTTED AT RUBY SHAFT. ; INFO FROM LAND.ST :(1971)
Comment (Production): 2 PRODUCTION PERIODS 1883-1893, 1898-1944.
Comment (Deposit): LODE HAS SEVERAL INTERSECTING VEINS WHICH TRANSVERSE THE GRANODIORITE AND JOIN AT SMALL ANGLES. THE GRANITE VEIN IS LARGEST AND RICHEST. IT HAS BEEN STOPED FOR AT LEAST 4500 FT ALONG THE STRIKE AND IN PLACES 2600 FT BELOW THE SURFACE. THE SOUTH VEIN IS THE MOST PRODUCTIVE FISSURE TO JOIN THE GRANITE.
Comment (Exploration): 1875 - DISCOVERED BY HOLLAND, ESTILL, AND MERRILL 1881 - CHARLES CLARK FORMED THE ST. LOUIS SYNDICATE WHO PURCHASED THE GRANITE FOR $40,000 AND SPENT $75,000 ON DEVELOPMENT. 1882 - BIMETALLIC MINING COMPANY ORGANIZED 1885-1892 - $20,000,000 IN SILVER AND GOLD MINED. 1898 - THE GRANITE MOUNTAIN AND THE BIMETALLIC WERE CONSOLIDATED THE GRANITE MOUNTAIN & BIMETALLIC MINES WERE WORKED SEPARATELY UNTIL 1898 - SINCE THEN HAVE WORKED AS ONE; BOTH LOCATED ON SAME ORE BODY. MILL CAPACITY 50 T/D. OPERATOR OF GRANITE TAILINGS: JOE METESH, PHILIPSBURG, MT.
Comment (Workings): WORKED FROM 5 DRIFT TUNNELS, TWO DEEP SHAFTS, AND A LONG ADIT WHICH DRAINS THE GRANITE MINE BETWEEN LEVELS 14 AND 15 AND THE BIMETALLIC MINE AT LEVEL 10.
Comment (Deposit): Merged data from Deposit ID's: 10172926 (Bi-Metallic) 10173358 (Granite Belle Claim) 10019456 (Granite Belle Claim) 10197106 (Granite, Ruby Shaft)
References
Reference (Deposit): EMMONS, W.H., AND CALKINS, F.C., 1913, GEOLOGY OF THE PHILIPSBURG QUADRANGLE: USGS PROFESSIONAL PAPER 78, P. 202-207.
Reference (Deposit): USBM RI 4399
Reference (Deposit): MBMG BULL 109, P. 7.
Reference (Deposit): MBMG BULL 92, P. 9.
Reference (Production): USGS PROF. PAPER 78; SUMMARIES IN ENG. AND MIN. JOUR. 1888-1893, USBM R.I. 4399
Reference (Deposit): EMMONS, W.H., 1907, THE GRANITE-BIMETALLIC AND CABLE MINES, PHILIPSBURG QUADRANGLE, MONTANA: US GEOLOGICAL SURVEY BULLETIN 315
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.
