Jumbo Mine

The Jumbo Mine is a silver and lead mine located in Lake county, Montana at an elevation of 5,000 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: Jumbo Mine

Commodity

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

Location

State: Montana
County: Lake
District: Chief Cliff 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

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1914
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: Salish Mountains

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: R
Description: Nw-Plunging Anticline To The West. Large Scale N-Trending And W-Trending Faults To The East.

Alterations

Not available

Rocks

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

Name: Argillite
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Analytical Data

Analytical Data: STOCKPILED PORTION OF VUGGY WHITE QUARTZ VEIN ASSAYED 10.20 % PB, 1.40 OZ/TON AG AND 0.003 OZ/TON AU. ANOTHER SAMPLE OF FIELD MATERIAL FROM THE DUMP CONTAINED SMALL AMOUNTS OF GOLD, SILVER AND COPPER.

Materials

Ore: Chalcopyrite
Ore: Galena
Ore: Malachite
Gangue: Quartz

Comments

Comment (Location): ON A TRIBUTARY OF THE NORTH FORK OF DAYTON CREEK.

Comment (Workings): WORKINGS CONSIST OF ONE ADIT AND ONE SHAFT - BOTH OF WHICH ARE CAVED - AS WELL AS A 40 FT TRENCH AND TWO SHALLOW PITS.

Comment (Geology): FISSURE VEINS TEND TO LIE PARALLEL TO FAULTS IN THIS AREA. HOST ROCKS STRIKE NW AND DIP EAST.

Comment (Development): PROPERTY HAS BEEN IDLE SINCE 1926 . A DUMP CONTAINING ABOUT 50,000 TONS OF WASTE ROCK, INDICATES CONSIDERABLE DEVELOPMENT WORK.

Comment (Deposit): CONTACT WITH VEIN IS COVERED. VEIN WIDTH HAS BEEN ESTIMATED FROM QUARTZ BOULDERS IN THE STOCKPILE TO BE IN EXCESS OF 2 FT. QUARTZ IS VUGGY.

References

Reference (Analytical Data): SRC.REF: JOHNS, W. M., 1970 : MONTANA BUREAU OF MINES AND GEOLOGY BULL. 79 , P. 144 .

Reference (Deposit): JOHNS, W. M., 1964 , GEOLOGIC INVESTIGATIONS IN THE KOOTENAI - FLATHEAD AREA, NORTHWEST MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY BULL. 42 , PP. 45 - 46 .

Reference (Deposit): JOHNS, W. M., 1970 , GEOLOGY AND MINERAL DEPOSITS OF LINCOLN AND FLATHEAD COUNTIES, MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY BULL. 79 , P. 144 .

Reference (Deposit): CONSV. DIV. COMP. DATE, 12-22-1970

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.