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Senator Stewart Mine

Past Producer in Shoshone county in Idaho, United States with commodities Lead, Silver, Zinc, Copper, Gold
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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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Ownership information
  19. Production statistics
  20. Links to other databases
  21. Bibliographic references
  22. Reporter information

Geologic information

Identification information

Deposit ID 10073355
MRDS ID W019399
Record type Site
Current site name Senator Stewart Mine
Alternate or previous names Stewart

Geographic coordinates

Point of reference Geographic coordinates: Elevation UTM Precision Relative position Point location
-116.17043, 47.52097 (WGS84) 869 East side of Government Gulch 1.6 kilometers south of Smelterville
(click for info)
-116.17043, 47.52097 (WGS84) 800 West side of Deadwood Gulch
Ore Body -116.17043, 47.52097 (WGS84) 1000

Site location context

Political divisions (FIPS codes)

Shoshone(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Kellogg West(quadrangle 1:24,000 scale)

Coeur D'Alene(quadrangle 1:100,000 scale)

Spokane(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork Coeur d'Alene(hydrologic unit)

Spokane(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(hydrologic region)

Geographic areas

Country State County
United States Idaho Shoshone

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 048N 002E 01, 11 Idaho

Comments on the location information

  • 2000 FT W OF THE CALEDONIA

Commodities

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

Materials information

Materials Type of material
Galena Ore
Tetrahedrite Ore
Sphalerite Ore
Siderite Gangue
Ankerite Gangue
Pyrite Gangue
Pyromorphite Trace

Alteration

  • (Local) Upper levels of orebody oxidized.

Analytical data

Result LESS THAN 1 OZ AG TO 1 % PB IN UPPER LEVELS AND MORE THAN 1 OZ IN THE LOWER LEVELS.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Revett Formation
    Rock description Revett Formation
    Stratigraphic age (youngest) Neoproterozoic

Economic information

Geologic structures

Type of structure Regional
Structure description Osburn Fault and West Fault, WNW striking shears.
Type of structure Local
Structure description NE-trending faults that link the Osburn and West Faults.
Type of structure Regional
Structure description Deposit within overturned NE limb of a WNW-trending anticline.

Ore body information

  • Name Senator Stewart Vein
    General form PINCH AND SWELL
    Strike N 35 DEG E
    Dip SE
    Thickness 213
    Length 285M

Comments on the ore body information

  • Orebody pinched out 213 meters below main adit level. Siderite and barite increase in abundance with depth as lead-silver grades increase.

Controls for ore emplacement

  • Ore-bearing structure links the West Fault and the Osburn Fault.
  • Orebody hosted by Revett Formation quartzite.

Comments on the geologic information

  • Host rocks variously identified as Burke Formation and St. Regis Formation quartzite. Early workers apparently did not recognize that stratigraphy was overturned. Rocks traditionally assigned to the St. Regis-Revett transition zone are now recognized as upper Revett Formation.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1896
Year of first production 1904
Year of last production 1951
Plant type Beneficiation (Mill)
Plant subcategory Gravity
Milling method Gravity
Production years 1904-1907, 1910-1922, 1924-1928, 1930-1931, 1946-1951

Mining district

District name Yreka

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Stewart Mining Co.
    Interest 100
    Home office New York
    First year 1902
    Last year 1923
  • Type Owner-Operator
    Owner Stewart Silver Lead Co.
    Interest 100
    Home office New York
    First year 1923
    Last year 1928
  • Type Lessee/Operator
    Owner Decker Development Co.
    Interest 100
    Home office Kellogg, Idaho
    First year 1927
    Last year 1928
  • Type Owner-Operator
    Owner Decker Development Co.
    Interest 100
    Home office Kellogg, Idaho
    First year 1928
    Last year 1929
  • Type Lessee/Operator
    Owner Day Mines, Inc.
    Interest 100
    Home office Wallace, Idaho
    First year 1946
    Last year 1949
  • Type Owner-Operator
    Owner Silver Bowl, Inc.
    Interest 100
    Home office Kellogg, Idaho
    First year 1942
  • Type Lessee/Operator
    Owner Bunker Hill Co.
    Interest 100
    Home office Kellogg, Idaho
    First year 1956

Production statistics

  • Year 1983
    Period 1904-1951
    Material Ore
    Ore mined 945118mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major smelter recovery Lead Lead 68459mt 8wt-pct

Comments on the production information

  • Ore tonnage and recovered metals reported by Mitchell and Bennett (1983) from USBM production data; ore grades calculated from USBM data and Stewart Mining Co. annual reports.

Comments on the workings information

  • MINE OPENED IN 1904 BY A 600 - FT. TUNNEL AND SECOND TUNNEL 250 FT BELOW THESE WORKINGS

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-74 Miller, Pat J. U.S. Geological Survey
Reporter 23-SEP-94 Western Field Operations Center U.S. Bureau of Mines
Updater 01-MAR-05 Keith R. Long U.S. Geological Survey

Beyond USGS

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

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