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  3. Mineral Resource Data System (MRDS)

East Pacific Mine

Producer in Broadwater county in Montana, United States with commodities Gold, 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. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10107304
MRDS ID W014696
Record type Site
Current site name East Pacific Mine
Related records 10220686

Geographic coordinates

Geographic coordinates: -111.69976, 46.42129 (WGS84)
Elevation 1792
Relative position ABOUT 18 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)

Federal lands

Helena-Lewis and Clark 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 Broadwater

Public Land Survey System information

Meridian Township Range Section Fraction State
008N 001W 26,27 Montana

Comments on the location information

  • UTM LOCATION OF PORTAL OF #4 ADIT

Commodities

Commodity Importance
Gold Primary
Silver Primary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Galena Ore
Gold Ore
Pyrite Ore
Tetrahedrite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous
    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;Frieburg Stock, Granodiorite
    Rock description Elkhorn Volcanics, Andesite;Frieburg Stock, Granodiorite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -111.69976, 46.42129
ListMap

Economic information

Geologic structures

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

Ore body information

  • General form TABULAR
    Strike N 75 E
    Dip 70 - 85 NW
    Length 2000M
    Width 2M

Controls for ore emplacement

  • Deposit Is In North-Trending Zone Of Stocks

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1882

Mining district

District name Winston District

Ownership information

  • Type Operator
    Owner Herb Carver C/O Western Laboratories Helena, Mt

Comments on the production information

  • PRODUCTION ESTIMATED FROM DOLLAR VALUE USING AVERAGE OF 1900-1949 METAL PRICES

Comments on the reserve resource information

  • ASSUME TOTAL MINERALIZED AREA 2 FT BY 1400 FT BY 1800 FT LESS ESTIMATED 250,000 ST MINERALIZED GROUND ALREADY MINED. GRADE IS 30% AVERAGE GRADE OF ORE MINED

Workings at the site

  • Type of workings Underground
    Length 8000M
    Overall depth 300M

Comments on the workings information

  • MINE DEVELOPED BY AT LEAST 4 ADITS AND 16 LEVELS. FRIEBURG MINE ON NORTHEAST EXTENSION OF VEIN

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

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

  • Production

    REED (1951) GIVES ESTIMATED OUTPUT GREATER THAN $2,000,000 AND GRADE. PRODUCTION FOR 1901-1948 WAS 35,647 ST ORE WITH AVERAGE GRADE.

General comments

Subject category Comment text
Deposit FRIEBURG VEIN WITHIN FRIEBURG STOCK APPEARS TO BE CONTINUATION OF EAST PACIFIC VEIN

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.

External references

Maps centered on this site