Little Pittsburg Mine

The Little Pittsburg Mine is a silver and copper mine located in Mineral county, Montana at an elevation of 3,501 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: Little Pittsburg Mine

Commodity

Primary: Silver
Primary: Copper
Secondary: Lead
Tertiary: Gold
Tertiary: Antimony

Location

State: Montana
County: Mineral
District: Keystone 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: W. Schneider

Owner Name: Pittsburg Silver Mining 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
Physiographic Detail: Bitterroot Mountains

Mineral Deposit Model

Not available

Orebody

Form: IRREGULAR , TABULAR

Structure

Type: R
Description: Osburn Fault Zone Short Distance North Of Mine

Type: L
Description: Overturned Flank Of Little Pittsburg Syncline

Alterations

Alteration Type: L
Alteration Text: Dolomitization Of St. Regis Fm, Burke Fm, And Revett Fm

Rocks

Name: Quartzite
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic

Analytical Data

Analytical Data: 11 OZ/TON AG, 10% PB, 0.5% CU, 0.2% SB

Materials

Ore: Chalcopyrite
Gangue: Limonite
Gangue: Quartz
Gangue: Pyrite
Unknown: Siderite

Comments

Comment (Commodity): NO GALENA OBSERVED, SO THAT HIGH AMOUNT OF LEAD RECOVERED SEEMED ANOMALOUS, SUSPECTED THAT "STIBNITE" WAS IN FACT BOULANGERITE.

Comment (Production): NO RECORD OF ANTIMONY CONTENT OF ORE. NO PRODUCTION RECORDED IN YEARS OTHER THAN THOSE LISTED ABOVE

Comment (Deposit): ORE VEINS STRIKE WNW-NO DIP AVAILABLE, STRIKE NE-DIP80 DEG NW ON N END-85 DEG SE ON S END, STRIKE WNW-DIP 30 DEG N

Comment (Workings): EXTENT OF UNDERGROUND WORKINGS ESTIMATED FROM MINE MAP NOT ALL ARE ACCESSABLE. 2 LEVELS EXIST. DEVELOPED BY KEESEY TUNNEL, LITTLE PITTSBURG TUNNEL(CAVED), WREN TUNNEL(CAVED) OLD SHAFT(CAVED).

Comment (Geology): NO GALENA OBSERVED, SO THAT HIGH AMOUNT OF LEAD RECOVERED SEEMED ANOMALOUS, SUSPECTED THAT "STIBNITE" WAS IN FACT BOULANGERITE (CAMPBELL, 1960).

References

Reference (Deposit): CAMPBELL, A. B., 1960 , GEOLOGY AND MINERAL DEPOSITS OF THE ST. REGIS - SUPERIOR AREA MINERAL COUNTY, MONTANA, U. S. GEOLOGICAL SURVEY BULLETIN 1082 - I P. 599 - 60

Reference (Deposit): 1951 OTHER DMEA PARTLY FINANCED REHABILITATION OF LAST 750 FT OF KEESEY TUNNEL FOR STUDY OF AN AREA THOUGHT TO CONTAIN SIGNIFICANT ORE.

Reference (Deposit): 1951 RECON R. E. WALLACE AND J. W. HOSTERMAN

Reference (Production): CAMPBELL, A. B., 1960 , GEOL. AND MIN. DEPOSITS OF THE ST. REGIS, SUPERIOR AREA, MINERAL CO., MONT.

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.