Florence Mine

The Florence Mine is a lead, zinc, and silver 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: Lead
Primary: Zinc
Primary: Silver
Secondary: Copper

Location

State: Montana
County: Cascade
District: Neihart Mining District

Land Status

Not available

Holdings

Not available

Workings

Type: Unknown

Ownership

Owner Name: Carroll Bennett

Owner Name: Dan Reeder And Associates

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1893
Discovery Year: 1886
Discovery Method: Ore-Mineral In Place
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: TABULAR

Structure

Type: L
Description: Moulton Fault Apparently Delimits Southwest Extension Of Ore

Alterations

Not available

Rocks

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic

Analytical Data

Analytical Data: 38 OZ AG/TON, 8% PB, 3.5% ZN (AVERAGE OF PRODUCTION)

Materials

Ore: Galena
Ore: Polybasite
Ore: Pyrargyrite
Ore: Chalcopyrite
Gangue: Barite
Gangue: Pyrite

Comments

Comment (Reserve-Resource): OME FILES

Comment (Production): ZINC NOT REPORTED IN EARLY SALES. EARLY SHIPMENTS REPORTED TO AVERAGE 50-200 OZ AG/TON, 4-10% PB, AND 3-10% ZN

Comment (Workings): MINE DEVELOPED BY 6 ADITS PLUS VERTICAL SHAFT FROM WHICH 5 LEVELS WERE TURNED

References

Reference (Deposit): ROBERTSON, A.G., 1951, MINES AND MINERAL DEPOSITS (EXCEPT FUELS) CASCADE COUNTY, MONTANA: U.S. BUREAU OF MINES. INFO. CIRC. 7589, P. 24-26

Reference (Deposit): SCHAFER, P.A., 1935, GEOLOGY AND ORE DEPOSITS OF THE NEIHART MINING DISTRICT, CASCADE COUNTY, MONTANA: MONTANA BUREAU OF MINES, MEM. 13, P. 34-36

Reference (Deposit): WEED, W.H., 1900, GEOLOGY OF THE LITTLE BELT MOUNTAINS, MONT: USGS, 20TH ANN. RPT. PT. 3, P. 425-426

Reference (Deposit): KEEFER, W.R., 1972, GEOLOGIC MAP OF THE WEST HALF OF THE NEIHART 15-MINUTE QUADRANGLE, CENTRAL MONTANA: USGS MISC. GEOL. INV. MAP I-726

Reference (Deposit): 1893 GEOLMAP W.H. WEED, 20TH ANN. RPT.

Reference (Deposit): 1964 GEOLMAP W.R. KEEFER, MAP I-276

Reference (Reserve-Resource): OME FILES

Reference (Production): U.S.B.M. INFO. CIRC. 7589, 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.