Marietta Mine

The Marietta Mine is a gold, silver, lead, and zinc mine located in Broadwater county, Montana at an elevation of 7,201 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: Marietta Mine

Commodity

Primary: Gold
Primary: Silver
Primary: Lead
Primary: Zinc
Secondary: Copper

Location

State: Montana
County: Broadwater
District: Park (Indian Creek)

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: Northern Milling Co., Inc.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1880
Discovery Year: 1878
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Elkhorn Mountains

Mineral Deposit Model

Not available

Orebody

Form: VEIN FILLING WITH SOME LOCALIZED THICKENING OF VEINS

Structure

Type: R
Description: Boulder Batholith, Lombard Overthrust Large North Trending Syncline

Type: L
Description: Small Scale Faulting, Altered Dikes On At Least 2 Levels Of Marietta, Also Quartz Diorites, Andesite

Alterations

Alteration Type: L
Alteration Text: Alteration Of Andesite Around Mineralized Veins

Rocks

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Analytical Data

Not available

Materials

Ore: Galena
Ore: Sphalerite
Ore: Chalcopyrite
Ore: Gold
Gangue: Quartz

Comments

Comment (Commodity): SOME OXIDATION PRODUCTS IE, AZURITE, MALACHITE OTHER MINERALS OCCURING SIDERITE, MANGANO CALCITE, ANKERITE, COVELLITE

Comment (Development): REGIONAL GEOLOGIC MAPPING DONE BY USGS DURING THE SUMMER OF 1958

Comment (Deposit): DIMENSIONS OF DEPOSIT APPROXIMATED VEIN RANGES IN THICKNESS FROM SEVERAL INCHES TO 9 FT. THE GENERAL STRIKE OF THE VEINS CHANGES ON EACH LEVEL

Comment (Workings): APPROXIMATELY 8700 FEET OF WORKINGS, FROM MONTANA BUREAU OF MINES BULLETIN 35 PLATE 1

Comment (Geology): ALTERATION OF VOLCANICS IS SAID TO HAVE BEEN PROPYLITIZATION, SILICIFICATION OF THE ANDESITE, ARGILLIZATION OF FELDSPARS SURROUNDING MINERALIZATION

References

Reference (Deposit): KLEPPER, M. R. RUPPEL, E. T., FREEMAN, V. L., WEEKS, R. A., 1971, GEOLOGY AND MINERAL DEPOSITS, EAST FLANK OF THE ELKHORN MOUNTAINS, BROADWATER DOUNTY, MONTANA: US GEOL SURVEY PROF. PAPER 665, P. 41

Reference (Deposit): REED, G. C., 1951, MINES AND MINERAL DEPOSITS (EXCEPT FUELS) BROADWATER COUNTY, MONT: US BUR MINES INF. CIRC. 7592, P. 48, 49

Reference (Production): SCHELL, E. M., 1963, NORTHERN PART PARK (INDIAN CREEK) DISTRICT PRODUCTION IS FOR ENTIRE PARK (INDIAN CREEK) DISTRICT THE MARIETTA MINE IS PROBABLY RESPONSIBLE FOR MOST OF THIS PRODUCTION

Reference (Deposit): SCHELL, E. M., 1963, ORE DEPOSITS OF THE NORTHERN PART OF THE PARK (INDIAN CREEK) DISTRICT, BROADWATER COUNTY, MONTANA: MONT. BUREAU OF MINES AND GEOL. BULL. 35, P. 1-38

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.