Norwich Mine

The Norwich Mine is a manganese mine located in Silver Bow county, Montana at an elevation of 5,712 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: Norwich Mine

Commodity

Primary: Manganese
Tertiary: Lead
Tertiary: Zinc
Tertiary: Silver
Tertiary: Molybdenum
Tertiary: Gold
Tertiary: Copper

Location

State: Montana
County: Silver Bow
District: Butte District

Land Status

Land ownership: Private
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: I. G. Irving And R. H. Nelson

Owner Name: Norwich Min. Co And Umont Min. Co.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
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: IRREGULAR

Structure

Type: R
Description: Boulder Batholith

Type: L
Description: One Major Cross Fault, East - West Fault System, Northwest Fault System, Northeast Fault System

Alterations

Alteration Type: L
Alteration Text: Sericitization, Chloritization, Minor Silicification, Pyritization

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Rhodochrosite
Ore: Sphalerite
Ore: Molybdenite
Ore: Galena
Gangue: Pyrite
Gangue: Quartz
Gangue: Tourmaline

Comments

Comment (Location): LOCATION APPROXIMATED

Comment (Commodity): SILVER MINERALS ALSO INCLUDE SILVER BEARING TETRAHEDRITE OR FREIBERGITE - POSSIBLY OTHERS

Comment (Deposit): THREE VEINS IN MINE AREA, NORWICH, PLUTUS, AND "HANGING WALL" VEINS, NORWICH VEIN HAS PRIMARY CONSIDERATION AND IS DESCRIBED ABOVE.

Comment (Workings): WORKINGS ON SIX LEVELS ON THE NORWICH VEIN "HANGING WALL" VEIN ENCOUNTERED ON 3 LEVELS

References

Reference (Deposit): COLE, J. W., 1951 , INVESTIGATION OF THE NORWICH MANGANESE DEPOSIT, SILVER BOW COUNTY, MONT: U. S. BUREAU OF MINES REPORT OF INVESTIGATIONS 4784 , 14 P.

Reference (Deposit): COLE, J.W., 1951, INVESTIGATION OF THE NORWICH MANGANESE DEPOSIT, SILVER BOW COUNTY, MONTANA: U.S. BUREAU OF MINES REPORT OF INVESTIGATION NO. 4784, 14 P.

Reference (Deposit): 1951 DIREXPL U. S. BUREAU OF MINE

Reference (Deposit): HO, AU - N60C, 1957 , GEOLOGY AND ORE DEPOSITS OF THE NORWICH MINE, SILVER BOW COUNTY, MONTANA, MASTERS THESIS, MONTANA SCHOOL OF MINES (MONTANA TECH). VOLS. 1 AND 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.