The Mammoth Mine is a gold and silver mine located in Boise county, Idaho at an elevation of 7,999 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: 7,999 Feet (2,438 Meters)
Commodity: Gold, Silver
Lat, Long: 44.0031, -115.69860
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.
Mammoth Mine MRDS details
Site Name
Primary: Mammoth Mine
Commodity
Primary: Gold
Primary: Silver
Tertiary: Zinc
Tertiary: Lead
Location
State: Idaho
County: Boise
District: Boise Basin ; Pioneerville 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.
Administrative Organization: Boise National Forest
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Year: 1924
Material type: ORE
Description: Ap_Grade: ^8.05 Oz Au And 3.3 Oz Ag
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1863
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: Sawtooth Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: L
Description: Minor Fault
Alterations
Alteration Type: L
Alteration Text: Oxidation, Sericitized
Rocks
Name: Granite
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cretaceous
Name: Granite
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Analytical Data: 15 LB. GRAB SAMPLE FROM STOCKPILE ASSAYED 8.05 OZ. AU, 3.3 OZ. AG
Materials
Ore: Galena
Ore: Sphalerite
Gangue: Pyrite
Gangue: Quartz
Comments
Comment (Commodity): GOLD REPLACES THE SULPHIDES AND IS NOT ASSOCIATED WITH THEM.
Comment (Production): MAMMOTH WAS WORKED IN FORMER YEARS AND HAS RECORDED PRODUCTION OF $472,000
Comment (Development): 8 UNPATENTED CLAIMS
Comment (Location): LOCATED 7 MI DUE EAST OF GRIMES PASS ON SUMMIT FLAT
Comment (Deposit): 1 VEIN - THE MAMMOTH, 2 LODES - THE JACKSON AND THE JUPITER; MAMMOTH VEIN TRENDS N 80 DEG E, DIPS 45 DEG SE, LODES TREND N 10 DEG E AND DIP TOWARDS EACH OTHER
References
Reference (Deposit): BALLARD, S. M., 1924, GEOLOGY AND GOLD DEPOSITS OF THE BOISE BASIN, BOISE COUNTY, IDAHO: IDAHO BUREAU OF MINES AND GEOLOGY BULL. 9, 103 P.
Reference (Deposit): ANDERSON, A. L., 1947 , GEOLOGY AND ORE DEPOSITS OF BOISE BASIN, IDAHO: USGS BULL. 944-C, P. 119 - 319
Reference (Deposit): 1924 GEOLMAP IDAHO BUREAU OF MINES, BULL. 9
Reference (Deposit): 1947 GEOLMAP ANDERSON, A.L., BULL. 944-C.
Reference (Production): BALLARD, S. M., 1924, IDAHO BUR MINES & GEOL BULL. 9.
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.
