1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Dewey Mine

Past Producer in Granite county in Montana, United States with commodities Gold, Silver, Copper, Barium-Barite, Antimony
Map
XML
JSON
KML
B
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. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10102019
MRDS ID DC11186
Record type Site
Current site name Dewey Mine

Geographic coordinates

Geographic coordinates: -113.34399, 46.82656 (WGS84)
Relative position .4 KM NW OF GARNET

Site location context

Political divisions (FIPS codes)

Granite(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Elevation Mountain(quadrangle 1:24,000 scale)

Missoula East(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Blackfoot(hydrologic unit)

Pend Oreille(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(hydrologic region)

Geographic areas

Country State County
United States Montana Granite

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 012N 014W 03 CENTER OF N2 Montana

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Secondary
Barium-Barite Critical Tertiary
Antimony Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Tetrahedrite Ore
Barite Gangue
Limonite Gangue
Pyrite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Oxidation

Analytical data

Result 1916 SHIPMENT $74/TON AU
Result 3.5 OZ/TON AU, 6.5 OZ/TON AG, 2%/TON CU.

Nearby scientific data

(1) -113.34399, 46.82656
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Bearmouth Overthrust
Type of structure Local
Structure description Deep Creek Anticline, Garnet Stock

Ore body information

  • General form IRREGULAR FLAT LENSES, BANDED
    Strike N75E
    Dip 35N
    Width 1.22M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Production years INTERMITTENT

Mining district

District name Garnet (First Chance) District

Production statistics

  • Year 1916
    Period 1915-1916
    Material AU CU AG
    Accuracy Estimate
    Description Cp_Grade: ^0.9% Au, .05%Cu, .05%Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 0wt-pct
    Major Copper Copper 0wt-pct
    Major Gold Gold 1wt-pct

Comments on the production information

  • $2000000 UP TO 1948

Workings at the site

  • Type of workings Underground
    Length 426.72M
    Overall depth 83.82M

Comments on the workings information

  • SEVERAL LEVELS, UNDERGROUND CONNECTIONS ARE MADE WITH A SHAFT 200 FT TO THE EAST AND WITH THE NANCY HANKS MINE TO THE WEST.

Reference information

Bibliographic references

  • Deposit

    USGS BULL 660, P. 178-82

  • Deposit

    MBMG MEM NO 31, P. 32

  • Production

    MBMG MEM NO 31

General comments

Subject category Comment text
Deposit FAULT MOVEMENT SINCE THE FORMATION OF THE VEIN HAS MOSTLY TAKEN PLACE PARALLEL TO THE VEIN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-APR-1981 Wise, Kristine K. (Elliott, James E.) 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