Mammoth Mine

Past Producer in Boise county in Idaho, United States with commodities Gold, Silver, Zinc, Lead
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Production statistics
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10069879
MRDS ID W007626
Record type Site
Current site name Mammoth Mine
Related records 10192434

Geographic coordinates

Geographic coordinates: -115.69955, 44.00298 (WGS84)
Elevation 2438
Relative position 7 MI SW OF LOWMAN, IDAHO

Site location context

Political divisions (FIPS codes)

Boise(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pine Flat(quadrangle 1:24,000 scale)

Deadwood River(quadrangle 1:100,000 scale)

Challis(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Boise-Mores(hydrologic unit)

Middle Snake-Boise(hydrologic accounting unit)

Middle Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Boise National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Idaho Boise

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 008N 006E 25 Idaho

Comments on the location information

  • LOCATED 7 MI DUE EAST OF GRIMES PASS ON SUMMIT FLAT

Commodities

Commodity Importance
Gold Primary
Silver Primary
Zinc Critical Tertiary
Lead Tertiary

Comments on the commodity information

  • GOLD REPLACES THE SULPHIDES AND IS NOT ASSOCIATED WITH THEM.

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Oxidation, Sericitized

Analytical data

Result 15 LB. GRAB SAMPLE FROM STOCKPILE ASSAYED 8.05 OZ. AU, 3.3 OZ. AG

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Idaho Batholith
    Rock description Idaho Batholith
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -115.69955, 44.00298

Economic information

Geologic structures

Type of structure Local
Structure description Minor Fault

Ore body information

  • Thickness 4.57M

Controls for ore emplacement

  • Fissure

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1863

Mining district

District name Boise Basin ; Pioneerville District

Land status

Ownership category National Forest
Area name Boise National Forest

Production statistics

  • Year 1924
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^8.05 Oz Au And 3.3 Oz Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 93g/mt
    Major Ore Gold Gold 227g/mt

Comments on the production information

  • MAMMOTH WAS WORKED IN FORMER YEARS AND HAS RECORDED PRODUCTION OF $472,000

Workings at the site

  • Type of workings Underground
    Overall depth 91.44M

Comments on development

  • 8 UNPATENTED CLAIMS

Reference information

Bibliographic references

  • 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.

  • Deposit

    ANDERSON, A. L., 1947 , GEOLOGY AND ORE DEPOSITS OF BOISE BASIN, IDAHO: USGS BULL. 944-C, P. 119 - 319

  • Deposit

    1924 GEOLMAP IDAHO BUREAU OF MINES, BULL. 9

  • Deposit

    1947 GEOLMAP ANDERSON, A.L., BULL. 944-C.

  • Production

    BALLARD, S. M., 1924, IDAHO BUR MINES & GEOL BULL. 9.

General comments

Subject category Comment text
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

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1975 Moody, Ula L. U.S. Geological Survey
Updater 01-AUG-1976 Siefken, Robert R. (Miller, Pat) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references