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Republic Mines

Producer in Park county in Montana, United States with commodities Silver, Lead, Zinc
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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. Production statistics
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10071372
MRDS ID W014715
Record type Site
Current site name Republic Mines
Alternate or previous names Irma, Blackrock, Greely, Houston
Related records 10173231

Geographic coordinates

Geographic coordinates: -109.9319, 45.00548 (WGS84)
Elevation 2484
Relative position ABOUT 1 1/2 MILES SOUTH OF COOKE CITY, MONTANA

Site location context

Political divisions (FIPS codes)

Park(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cooke City(quadrangle 1:24,000 scale)

Red Lodge(quadrangle 1:100,000 scale)

Billings(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Yellowstone Headwaters(hydrologic unit)

Upper Yellowstone(hydrologic accounting unit)

Upper Yellowstone(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Custer Gallatin 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 Park

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 009S 014E 35,36 Montana

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary

Materials information

Materials Type of material
Argentite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Gallatin Limestone, Thin-Bedded Limestones & Shales;Gros Ventre Formation, Limestone & Shale
    Rock description Gallatin Limestone, Thin-Bedded Limestones & Shales;Gros Ventre Formation, Limestone & Shale
    Stratigraphic age (youngest) Late Cambrian

Nearby scientific data

(1) -109.9319, 45.00548
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Fracture System Believed Result Of Large, Pre-Mineral, East - West Fault Between Irma & Republic Mines

Ore body information

  • General form SHOOTS
    Length 1000M
    Width 5M

Controls for ore emplacement

  • Ore Concentrated In Intersecting Patterns Of Steeply-Dipping Fractures And Sheeted Zones

Comments on the geologic information

  • UPPER LIMIT OF VEIN SYSTEM IS THE GALLATIN DEVELOPMENT HAS BEEN HAMPERED AT DEPTH BY WATER BUT UNDERLYING GROS VENTRE FM. SOURCE OF SPECULATION AS TO ORE CONTENT.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1875
Discoverer Miller, Moore, Gurley, And Henderson

Mining district

District name New World District

Ownership information

  • Type Owner-Operator
    Owner R. Huckaba,
    Home office Box 336, Whitehall, Mt 59759

Production statistics

  • Year 1949
    Period 1901 - 1949
    Material ZN
    Accuracy Estimate
    Description Cp_Grade: ^About 5 %
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Zinc Zinc 5wt-pct
  • Year 1949
    Period 1901 - 1949
    Material PB
    Accuracy Estimate
    Description Cp_Grade: ^About 10 %
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Lead Lead 10wt-pct
  • Year 1949
    Period 1901 - 1949
    Material AG
    Accuracy Estimate
    Description Cp_Grade: ^About 20 Toz/St
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 565g/mt

Comments on the production information

  • GREATEST PRODUCTION ABOUT 1906-7, 1920-24, 1936-49. SOME ORE MAY HAVE BEEN SHIPPED AFTER 1949. PRODUCTION RECORDS ARE SPARSE AND AMBIGUOUS.

Comments on the reserve resource information

  • NO ESTIMATE MAY BE MADE BECAUSE OF SPARSE DATA AND GEOLOGIC COMPLEXITY. HIGH GRADE OF ORE PRODUCED INDICATES THAT SIGNIFICANT AMOUNTS OF LOW-GRADE ROCK MAY BE PRESENT AND DISCOVERY OF HIGH GRADE SHOOTS AT DEPTH IN THE GROS VENTRE FM. IS PROBABLE.

Workings at the site

  • Type of workings Surface/Underground
    Length 1500M

Comments on the workings information

  • DEPOSIT DEVELOPED BY SEVERAL SHAFTS, ADITS AND OPEN CUTS - FOR A LENGTH OF ABOUT 850 M AND A VERTICAL RANGE OF 76 M. WORKINGS BETWEEN THE IRMA & REPUBLIC MINES ARE GROUPED BUT NOT INTERCONNECTED.

Reference information

Bibliographic references

  • Deposit

    REED, G. C., 1950, MINES & MINERAL DEPOSITS - PARK COUNTY, MONTANA, U.S. BUREAU MINES INF. CIRC. 7546.

  • Deposit

    MCCARTHY AND LAKIN, 1956, GEOCHEMICAL PROSPECTING BY SOIL ANALYSES IN MONTANA, MT BUREAU MINES & GEOLOGY BULL. 7.

  • Deposit

    LOVERING, T. S., 1929, THE NEW WORLD OR COOKE CITY MINING DISTRICT, PARK CO., MT, U.S. GEOLOGICAL SURVEY BULL. 811-A.

  • Production

    REED, 1950, USBM IC 7546, USBM MINERALS YEARBOOKS 1948-49

General comments

Subject category Comment text
Deposit Discovery Year: 1870'S
Deposit THE REPUBLIC VEIN WAS THE FIRST VEIN TO BE DISCOVERED IN THE DISTRICT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1976 Mlynarczyk, Meg S. 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