Pomeroy Mine

Past Producer in Beaverhead county in Montana, United States with commodities Gold, Silver, Lead, Copper, Zinc
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. Ownership information
  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 10101967
MRDS ID DC09007
Record type Site
Current site name Pomeroy Mine
Alternate or previous names Brick Pomeroy, Silver Buckle, Silver Belt

Geographic coordinates

Geographic coordinates: -112.967, 45.19879 (WGS84)
Elevation 2048
Relative position 3.0 MILES NNE OF BANNACK

Site location context

Political divisions (FIPS codes)

Beaverhead(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bannack(quadrangle 1:24,000 scale)

Dillon(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Beaverhead(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Montana Beaverhead

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 007S 011W 28 Montana

Comments on the location information

  • ACCORDING TO MAPS BY LOWELL AND SHENON, CORRECT LOCATION IS LABLED DEL MONTE MINE ON THE BANNACK QUADRANGLE

Commodities

Commodity Importance
Gold Primary
Silver Primary
Lead Primary
Copper Primary
Zinc Critical Secondary

Materials information

Materials Type of material
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) Oxidation, Gouge

Analytical data

Result CHIP SAMPLE ACROSS GOUGE ASSAYED 0.003 OZ AU/TON, 1.25 OZ AG/TON, 0.20% PB, AND 0.40% ZN.

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Madison
    Rock description Madison
    Stratigraphic age (youngest) Mississippian
    Stratigraphic age (youngest) Mississippian

Nearby scientific data

(1) -112.967, 45.19879

Economic information

Geologic structures

Type of structure Local
Structure description Limestone Trends N30w, 25 Ne. Possibly Two N Trending Faults.

Ore body information

  • General form LENSES
    Strike N 80 E
    Dip 60 N
    Width 1.22M
    Depth to top 0M

Controls for ore emplacement

  • Gouge Zone, 2 To 4 Feet Thick.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1865
Year of first production 1865
Production years 1870'S

Mining district

District name Blue Wing District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Spokane National Mines, Inc.
    First year 1967

Comments on the production information

  • PROPERTY WAS APPARENTLY IDLE FROM 1909-1966.

Workings at the site

  • Type of workings Underground
    Length 243.84M

Comments on the workings information

  • INCLINED SHAFT WITH OPEN STOPES WHICH REACH THE SURFACE. THREE OR FOUR SHAFTS IN ALL.

Comments on development

  • THREE PATENTED CLAIMS, THE SILVER BUCKLE, SILVER BELT, AND QUEBEC. SPOKANE MINES INC. DID A SMALL AMOUNT OF EXPLORATION WORK IN 1966-67.

Reference information

Bibliographic references

  • Deposit

    MBMG BULL 6, P. 37.

  • Deposit

    USGS MGI I-433

  • Deposit

    BERGER, B.R., AND OTHERS, 1979, GEOCHEM. RECON.-MINING DISTRICTS OF SO. PIONEER MTNS., MONT: U.S.G.S. OPEN-FILE REPORT 79-1426, P. 13.

  • Deposit

    MBMG BULL 85, P. 103.

  • Deposit

    1931 GEOLMAP M.B.M.G. BULL. 6

  • Deposit

    1965 GEOLMAP LOWELL, W.R., U.S.G.S. MAP I-433

  • Deposit

    1972 COMPILE M.B.M.G. BULL. 85

  • Deposit

    1979 RECON BERGER, B.R., U.S.G.S. OPEN-FILE 79-1426

  • Production

    M.B.M.G. BULL. 85

General comments

Subject category Comment text
Deposit WELL-DEFINED VEINS IN BLUISH-WHITE LIMESTONE. POSITION OF WORKINGS INDICATES VEIN WAS OFFSET BY TWO NORTH-TRENDING FAULTS WITH LEFT-LATERAL APPARENT DISPLACEMENT
Deposit Discovery Year: 1860'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-JUL-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.