Mcgregor Group

The Mcgregor Group is a silver and lead mine located in Custer county, Idaho at an elevation of 7,001 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

Name: Mcgregor Group  

State:  Idaho

County:  Custer

Elevation: 7,001 Feet (2,134 Meters)

Commodity: Silver, Lead

Lat, Long: 44.4094, -114.31640

Map: View on Google Maps

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.


Satelite image of the Mcgregor Group

Mcgregor Group MRDS details

Site Name

Primary: Mcgregor Group


Commodity

Primary: Silver
Primary: Lead
Secondary: Copper
Secondary: Gold
Tertiary: Zinc
Tertiary: Fluorine-Fluorite


Location

State: Idaho
County: Custer
District: Bayhorse District


Land Status

Not available


Holdings

Not available


Workings

Type: Underground


Ownership

Owner Name: Bunker Hill Co.

Owner Name: W. B. Swigert


Production

Year: 1911
Time Period: 1901 - 1911
Material type: ORE
Description: Cp_Grade: ^74.8 Oz Ag/T, 45.6 % Pb, 0.3 % Cu


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1870
Discovery Year: 1870
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: Salmon River Mountains


Mineral Deposit Model

Not available


Orebody

Form: IRREGULAR


Structure

Type: R
Description: Idaho Batholith

Type: L
Description: Bayhorse Anticline, Swigert Fault


Alterations

Alteration Type: L
Alteration Text: Silicification Of Wall Rock


Rocks

Name: Phyllite
Role: Host
Age Type: Host Rock
Age Young: Late Cambrian

Name: Phyllite
Role: Host
Age Type: Associated Rock Unit
Age Young: Late Jurassic


Analytical Data

Not available


Materials

Ore: Smithsonite
Ore: Cerargyrite
Gangue: Quartz
Gangue: Pyrite


Comments

Comment (Development): ECON.COM: LOW GRADE ORE AND LONG DISTANCE TO SMELTER DISCOURAGE FURTHER DEVELOPMENT

Comment (Workings): ROSS STATED THE PACIFIC ORE WAS REPLACEMENT, CHAMBERS STATED THAT THE ORE WAS IN BRECCIA ZONES CONCORDANT WITH BEDDING. DEPOSIT SIZE IS THAT OF THE PACIFIC MINE

Comment (Deposit): CHAMBERS AND OTHERS FELT THAT THE AGE OF MINERALIZATION WAS EARLY TERTIARY RATHER THAN EARLY CRETACEOUS AS ROSS BELIEVED

Comment (Production): ITEM 8 IS FOR ALL RECORDED PRODUCTION FROM 1901-1911; UMPLEBY REPORTS THAT THE PACIFIC PRODUCED $65,000 PRIOR TO 1911, AND THE HOOSIER PRODUCED $70,000; CHAMBERS SAYS PACIFIC MORE THAN DOUBLED PRODUCTION AFTER 1911.

Comment (Location): 7 1/2 MIN USGS TOPO MAP BAYHORSE IS AVAILABLE

Comment (Reserve-Resource): MCGREGOR GROUP CONTAINS LARGEST RESERVES OF FLUORSPAR IN THE BAYHORSE DISTRICT

Comment (Reserve-Resource): RESERVES ARE MAINLY IN THE PACIFIC MINE


References

Reference (Deposit): CHAMBERS, A. E. 1966, GEOLOGY AND MINERAL DEPOSITS OF PART OF THE BAYHORSE MINING DISTRICT: UNPUBLISHED PH.D DISSERTATION, UNIV. OF ARIZONA

Reference (Deposit): 1913 RECON UMPLEBY, J. B.

Reference (Deposit): 1937 RECON ROSS, C. P.

Reference (Deposit): 1945 DIREXPL A. S. & R. CO., LOCATED LOW GRADE ORE

Reference (Deposit): 1949 DIREXPL W. B. SWIGERT & ASS., PROVED LOW GRADE ORE

Reference (Deposit): 1958 DIREXPL BUNKER HILL CO., NO SULFIDE DISCOVERED

Reference (Production): ROSS, C. P., 1937 USGS BULL. 877

Reference (Reserve-Resource): CHAMBERS, A. E., 1966, PH.D DISSERTATION U. OF ARIZONA

Reference (Deposit): UMPLEBY, J. B., 1913, SOME ORE DEPOSITS IN NORTHWESTERN CUSTER COUNTY, IDAHO; USGS BULL. 539, P. 31-38, 64-67, 69

Reference (Deposit): ROSS, C. P., 1937, GEOLOGY AND ORE DEPOSITS OF THE BAYHORSE REGION, CUSTER COUNTY, IDAHO: USGS BULL. 877, P. 148


Idaho Gold

Where to Find Gold in Idaho

"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more: Where to Find Gold in Idaho.