Star Group

The Star Group is a silver and lead mine located in Cascade county, Montana at an elevation of 5,591 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: Star Group
Secondary: Evening Star
Secondary: London
Secondary: Morning Star

Commodity

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

Location

State: Montana
County: Cascade
District: Neihart District

Land Status

Not available

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: Stark, Lewis B.
Home Office: Box 64, Neihart, Mt 59465

Production

Year: 1948
Time Period: 1901 - 1948
Material type: AU
Description: Cp_Grade: ^Approx. 0.01 Oz/St
Year: 1948
Time Period: 1901 - 1948
Material type: PB
Description: Cp_Grade: ^Approx. 2 %
Year: 1948
Time Period: 1901 - 1948
Material type: AG
Description: Cp_Grade: ^Approx. 4.5 Oz/St

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1925
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

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

Mineral Deposit Model

Not available

Orebody

Form: SHOOTS

Structure

Type: R
Description: Zone Of Igneous Intrusions Covering Over 800 Square Km.

Type: L
Description: The Vein Has Been Offset By Several Cross Faults & Some Strike Faults That Have Crushed The 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

Analytical Data

Not available

Materials

Ore: Galena
Ore: Sphalerite
Ore: Pyrargyrite
Ore: Silver
Ore: Stephanite
Gangue: Quartz

Comments

Comment (Location): U.T.M. COORDINATES TAKEN ON LOWER STAR ADIT

Comment (Production): PRODUCTION WAS FROM 55,228 ST SHIPPING ORE. FIGURES FROM BOTH LONDON & EVENING STAR PROPERTIES.

Comment (Workings): MINE DEVELOPMENT INCLUDED 3 ADITS, SEVERAL RAISES AND WINZES. THE STAR ADIT HAS BEEN MAIN HAULAGE & WORKING LEVEL. 1939 - 50 TON FLOTATION MILL BUILT - AS OF 1975 PROPERTY REPORTED TO HAVE 100 T/D MILL.

Comment (Geology): PRECAMBRIAN CRYSTALLINE ROCKS ARE PRE-BELT

References

Reference (Deposit): KLEINKOPF, M. D., WITKIND, I. J., AND KEEFER, W. R., 1972, AEROMAGNETIC, BOUGUER GRAVITY, AND GENERALIZED GEOLOGIC MAPS OF THE CENTRAL PART OF THE LITTLE BELT MOUNTAINS, MONTANA: U.S. GEOLOGICAL SURVEY MAP GP-837

Reference (Production): ROBERTSON, 1951, U.S.B.M. INF. CIRC. 7589

Reference (Deposit): SCHAFER, P. A., 1935, GEOLOGY & ORE DEPOSITS OF THE NEIHART MINING DISTRICT, CASCADE CO., MT, M.B.M.G. MEMOIR 13.

Reference (Deposit): ROBERTSON, A. F., 1951, MINES & MINERAL DEPOSITS - CASCADE COUNTY, U.S. BUREAU MINES INF. CIRC. 7589.

Reference (Deposit): HERDLICK, J. A., 1949, INVESTIGATION OF THE STAR MINE, NEIHART DISTRICT, CASCADE COUNTY, MT, U.S. BUREAU MINES REPT. INVEST. 4474.

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.