Trout Mine

The Trout Mine is a silver and manganese mine located in Granite county, Montana at an elevation of 6,001 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

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.

Site Name

Primary: Trout Mine
Secondary: Pocahontas
Secondary: Speckled Trout
Secondary: Gem
Secondary: Algonquin Group

Commodity

Primary: Silver
Primary: Manganese
Secondary: Copper
Secondary: Zinc
Secondary: Gold
Secondary: Lead
Tertiary: Arsenic

Location

State: Montana
County: Granite
District: Philipsburg (Granite-Flint Creek) District

Land Status

Not available

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: Trout Mining Co.

Owner Name: Trout Mining Co.,
Home Office: Philipsburg, Mt.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1870
Discovery Year: 1868
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

Not available

Orebody

Form: TABULAR, LENTICULAR, PODS

Structure

Type: R
Description: Philipsburg Batholith

Type: L
Description: Philipsburg Anticline, Philipsburg Overthrust

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Tennantite
Ore: Gold
Ore: Psilomelane
Ore: Galena
Ore: Sphalerite
Gangue: Rhodochrosite
Gangue: Quartz
Gangue: Pyrolusite

Comments

Comment (Workings): 10 LEVELS. UPPER 5 LEVELS ARE CONNECTED BY TROUT SHAFT. LOWER LEVELS OPENED FROM ALGONQUIN SHAFT.

Comment (Geology): SEDIMENTARY ROCKS NEAR GRANODIORITE METAMORPHOSED TO MARBLE, BANDED WITH GARNET-AMPHIBOLE.

Comment (Deposit): IN BRECCIATED ORE NEARLY ALL OF THE AG WAS IN THE GRAY QUARTZ. CHIEF VEIN IS POCAHONTAS, TRACED FOR MORE THAN 760 M. AG-ZN ORE CONFINED LARGELY TO THIS VEIN. IRREGULAR BODIES OF MN ORE BORDER POCAHONTAS VEIN AND SMALL VEINS TO THE N. BODIES ARE ABOUT 12 M THICK, 50 M LONG, AND 30 M WIDE. VEINS ARE UP TO 10 M WIDE. THE MN VEIN PITCH STEEPLY NE PARALLEL WITH THE DIP OF THE LIMESTONE.

Comment (Production): PRODUCTION FIGURES AND GRADES INCOMPLETE. ESTIMATES MAY BE IN ERROR BY 50% OR MORE IN SOME CASES. ABOUT 0.5 OF ESTIMATED PRODUCTION WAS IN 1924-1944. 1870-1906 TOTAL PRODUCTION WAS $500000,IT CARRIED 20-150 OZ/TON AG AND $3-4/TON AU.

Comment (Deposit): GEM CLAIM ONE OF FIRST LOCATED IN DISTRICT; PRODUCED 30,000 LT OF MN ORE BY 1918. POCAHONTAS, OPERATED BY PATTEN BROS. AND WESTERN ORE & MINING CO., PRODUCED SEVERAL THOUSAND TONS BY 1918. AFTER BEING IDLE FOR ABOUT 30 YEARS TROUT WAS BOUGHT AND OPENED BY WESTERN ORE ABOUT 1917. GROUP WAS PURCHASED AND COMBINED IN 1924 BY TROUT MINING DIV., AMERICAN MACHINE AND METALS CORP. THE TROUT MINING DIV. THEN SEPARATED ABOUT 1960 TO BECOME THE TROUT MINING CO. ; INFO.SRC : 1 PUB LIT

Comment (Reserve-Resource): RESOURCES ESTIMATED BY ASSUMING WEDGE OF FAVORABLE HORIZONS (SILVER HILL, HASMARK, RED LION) HAS BEEN MINED TO 1200 FT. AND COULD BE MINED AN ADDITIONAL 2800 FT.

References

Reference (Deposit): USBM REP INVES 4399, 9 P.

Reference (Deposit): USGS BULL 922-G, P. 157-204.

Reference (Deposit): USBM REP INVES 4723, 57 P.

Reference (Deposit): USGS BULL 725, P. 146-174.

Reference (Deposit): MBMG BULL 25, P. 18.

Reference (Deposit): USGS PP 78, P. 209-10.

Reference (Deposit): USGS BULL 1237, P. 15-57, PLATES.

Reference (Production): USBM RI 4399, RI 4723

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.