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
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.
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" 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.
