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Custer Mine

Past Producer in Broadwater county in Montana, United States with commodities Gold, Silver, Lead, Copper, Molybdenum
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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. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10071356
MRDS ID W014694
Record type Site
Current site name Custer Mine

Geographic coordinates

Geographic coordinates: -111.6667, 46.45073 (WGS84)
Elevation 1411
Relative position ABOUT 22 KM NORTHWEST OF TOWNSEND

Site location context

Political divisions (FIPS codes)

Broadwater(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Winston(quadrangle 1:24,000 scale)

Townsend(quadrangle 1:100,000 scale)

White Sulphur Springs(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Missouri(hydrologic unit)

Upper Missouri(hydrologic accounting unit)

Missouri-Marias(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Montana Broadwater

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 008N 001W 13 Montana

Comments on the location information

  • UTM LOCATION OF CUSTER SHAFT

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Secondary
Copper Secondary
Molybdenum Secondary

Materials information

Materials Type of material
Chalcopyrite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Monzonite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Elkhorn Volcanics, Andesite;Edna Stock, Adamellite Porphyry
    Rock description Elkhorn Volcanics, Andesite;Edna Stock, Adamellite Porphyry
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) Elkhorn Mountains Volcanics
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith, Lombard Overthrust
Type of structure Local
Structure description Edna Stock

Ore body information

  • General form TABULAR
    Strike N 30 E
    Dip 62 NW
    Length 1000M
    Width 1M
    Depth to top 0M

Controls for ore emplacement

  • Edna Stock; Deposit Is In North-Trending Zone Of Stocks

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1885

Mining district

District name Winston District

Ownership information

  • Type Operator
    Owner Custer - Hyantha Mines
    Home office Box 194, Winston, Mt

Comments on the production information

  • REED (1951) GIVES ESTIMATED PRODUCTION OF CUSTER IRON AGE, AND HYANTHA MINE MAP INDICATES 200,000 ST ORE AND WASTE MINED GROUPS AT BETWEEN $700,000 AND $1,500,000 MOSTLY BETWEEN 1879 AND 1901. EARL (1964) BELIEVES THAT MOST OF THE PRODUCTION CAME FROM THE CUSTER. FOR ESTIMATED PRODUCTION IT IS ASSUMED THAT PRODUCTION OF THE CUSTER WAS $300,000. THESE GROUPS PRODUCED 54,229 ST ORE BETWEEN 1901 AND 1948 AT A GRADE OF 0.23 TOZ/ST AU, 0.8 TOZ/ST AG, 0.6% PB.

Comments on the reserve resource information

  • COMPLETE STOPING TO 500 LEVEL GIVES 250,000 ST LESS ABOUT 150,000 ST MINERALIZED GROUND ALREADY MINED LEAVES 100,000 ST MINERALIZED GROUND (2 FT WIDE VEIN). GRADE IS SLIGHTLY LESS THAN GRADE OF ORE RECLAIMED FROM WASTE DUMPS AND NEARBY PROSPECTS AND AVERAGE GRADE OF PRODUCTION 1901-1948

Workings at the site

  • Type of workings Underground
    Length 5000M
    Overall depth 250M

Comments on the workings information

  • CUSTER VEIN DEVELOPED ON AT LEAST TEN LEVELS THROUGH CUSTER SHAFT AND THE MAIN ADIT.

Reference information

Bibliographic references

  • Deposit

    EARLL, F. N., 1964, ECONOMIC GEOLOGY AND GEOCHEMICAL STUDY OF THE WINSTON MINING DISTRICT, BROADWATER CO., MONTANA: MONTANA BUREAU OF MINES GEOL. BULL. 41

  • Deposit

    REED, G. C., 1951, MINES AND MINERAL DEPOSITS (EXCEPT FUELS), BROADWATER CO., MONTANA: U.S. BUREAU OF MINES INF. CIRC. 7592

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1976 Krohn, Douglas H. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site