Florence Mine

The Florence Mine is a silver and lead mine located in Cascade county, Montana at an elevation of 5,600 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: Florence Mine

Commodity

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

Location

State: Montana
County: Cascade
District: Neihart 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: M. And I Mining Co. E. A. Shaw Pres.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1893
Discovery Year: 1886
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: M

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Little Belt Mountains

Mineral Deposit Model

Not available

Orebody

Form: LINEAR

Structure

Type: R
Description: Pre - Beltian Gneisses Etc Arched Upward

Type: L
Description: Fault On South End Of Primary Ore Shoot

Alterations

Alteration Type: L
Alteration Text: Some Secondary Enrichment Near Surface

Rocks

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

Analytical Data

Not available

Materials

Ore: Tetrahedrite
Ore: Chalcopyrite
Ore: Polybasite
Ore: Proustite
Ore: Sphalerite
Ore: Galena
Ore: Pyrite
Gangue: Quartz
Gangue: Barite
Gangue: Ankerite

Comments

Comment (Production): AN AMOUNT OF ZINC NOT ACCOUNTED FOR, PROBABLY AS MUCH AS LEAD RECOVERED, WAS NOT REPORTED IN EARLY SHIPMENTS

Comment (Development): DEVELOPMENT AND MINING DONE BEFORE 1901 NO RECORD OF AMOUNT

Comment (Deposit): THE VEIN DESCRIBED ABOVE IS THE FLORENCE VEIN, THERE A FOUR VEINS WITHIN A WIDTH OF 300 FEET. TWO HAVE BEEN PROSPECTED ON THE SURFACE.

Comment (Location): ADITS USED FOR LOCATION, ALTITUDE APPROXIMATE SECTIONS NOT SURVEYED

References

Reference (Deposit): ROBERTSON, A. F., 1951 , MINES AND MINERAL DEPOSITS (EXCEPT FUELS) CASCADE COUNTY, MONTANA: U. S. BUREAU OF MINES INFOR CIRCULAR NO 7589 P 24 - 26

Reference (Deposit): SCHAFER, P. A., 1935 , GEOLOGY AND ORE DEPOSITS OF THE NEIHART MINING DISTRICT, CASCADE COUNTY, MONTANA: MONT BUREAU OF MINES AND GEOL. MEMOIR NO. 13 P 34 - 36

Reference (Deposit): WEED, W. H., 1900 , GEOLOGY OF THE LITTLE BELT MOUNTAINS, MONTANA; U. S. GEOLOGICAL SURVEY 20TH ANN. REPORT PT 3. P 425 , 426

Reference (Production): ROBERTSON, A. F. 1951 , MINES AND MINERAL DEPOSITS (EXCEPT FUELS) CASCADE CO., MONT., P 25

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.