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Mammoth Mine

Past Producer in Madison county in Montana, United States with commodities Silver, Copper, Gold
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  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 10105635
MRDS ID W013407
Record type Site
Current site name Mammoth Mine
Alternate or previous names Leviathon Mine
Related records 10245466

Geographic coordinates

Geographic coordinates: -112.01392, 45.66712 (WGS84)
Elevation 1926
Relative position APPROXIMATELY 16 MILES SOUTH, BY ROAD, FROM JEFFERSON ISLAND, MONTANA

Site location context

Political divisions (FIPS codes)

Madison(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Manhead Mountain(quadrangle 1:24,000 scale)

Butte South(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Jefferson(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Beaverhead-Deerlodge 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 Montana Madison

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 002S 003W 18 Montana

Commodities

Commodity Importance
Silver Primary
Copper Primary
Gold Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Sphalerite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Schist
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Neoarchean
  • Host or associated Associated
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Tobacco Root Batholith Quartz Monzonite
    Rock description Tobacco Root Batholith Quartz Monzonite
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Pony Formation; Gneiss & Schist
    Rock description Pony Formation; Gneiss & Schist

Nearby scientific data

(1) -112.01392, 45.66712
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Mammoth Fault Trends N45w, 70s.

Ore body information

  • General form LENTICULAR
    Strike EAST - WEST
    Dip 60 S
    Length 91.44M
    Width 6.1M

Controls for ore emplacement

  • Fissure Intersections, Falt Zone

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1870

Mining district

District name So. Boulder District

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Mammoth Mines Corp.
    Home office Twin Bridges, Mt

Production statistics

  • Year 1932
    Period 1905 - 1932
    Material CU
    Accuracy Accurate
    Description Cp_Grade: ^0.3 %
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Copper Copper 0wt-pct
  • Year 1932
    Period 1905 - 1932
    Material AG
    Accuracy Accurate
    Description Cp_Grade: ^0.53 Oz/St
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Silver Silver 17g/mt
  • Year 1932
    Period 1905 - 1932
    Material AU
    Accuracy Accurate
    Description Cp_Grade: ^0.25 Oz/St
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 8g/mt

Comments on the production information

  • LARGEST INDIVIDUAL PRODUCER IN THE TOBACCO ROOT REGION. PRODUCTION FROM 214,149 ST OF ORE.

Workings at the site

  • Type of workings Underground
    Length 5486.4M
    Overall depth 304.8M

Comments on the workings information

  • 18000 FT. OF ADITS AND CROSSCUTS ON 5 LEVELS; 2 SHAFTS, 175 AND 150 FT. DEEP. (1935)

Comments on development

  • FULLY EQUIPPED MINE ; ECON.COM: ORE SHOOTS TEND TO TERMINATE ABRUPTLY

Reference information

Bibliographic references

  • Deposit

    LORAIN, 1937, GOLD LODE MINING TOBACCO ROOT MTS, U. S. BUREAU MINES INF. CIRC. 6972.

  • Deposit

    USGS BULL 574, P. 170.

  • Deposit

    TANSLEY, W., SCHAFER, P., AND HART, L., 1933, A GEOLOGICAL RECONNAISSANCE OF THE TOBACCO ROOT MOUNTAINS, MADISON CO. MONTANA: MONT. BUREAU OF MINES AND GEOL. MEMOIR 9, P 29-32

  • Deposit

    GILBERT, F.C., 1935, DIRECTORY OF MONTANA MINING PROPERTIES: MT. BUREAU OF MINES AND GEOL., MEM. 15, P. 50

  • Deposit

    REYNER, M.L., 1949, DIRECTORY OF MINING PROPERTIES, 1949: MT. BUREAU OF MINES AND GEOL., MEMOIR 31, P. 68.

  • Deposit

    REID, R.R., 1957, BEDROCK GEOLOGY OF THE NORTH END OF THE TOBACCO ROOT MTNS., MADISON CO., MT: MT. BUREAU OF MINES AND GEOL., MEMOIR 36, P. 20.

  • Deposit

    1914 RECON WINCHELL, A.N., U.S.G.S. BULLETIN 574

  • Deposit

    1933 RECON MBMG MEMOIR 9

  • Production

    LORAIN, 1937, U. S. BUREAU OF MINES INF. CIRC. 6972

General comments

Subject category Comment text
Deposit TWO MINERAL ZONES: EAST SHOOT (MOST PRODUCTIVE), AND WEST SHOOT, (SEE TANSLEY, 1933).

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1976 Mlynarczyk, Meg S.; Krohn, D. U.S. Geological Survey
Updater 01-MAY-1980 Loen, Jeffrey S. (Pearson, Robert C.) U.S. Geological Survey

Beyond USGS

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

External references

Maps centered on this site