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Steward Mine

Past Producer in Silver Bow county in Montana, United States with commodities Copper, Silver, Gold, Zinc, Barium-Barite, Arsenic, Fluorine-Fluorite
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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. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  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 10070471
MRDS ID W013417
Record type Site
Current site name Steward Mine
Related records 10148687

Geographic coordinates

Geographic coordinates: -112.53645, 46.01879 (WGS84)
Elevation 1524
Relative position ABOUT 1.9 KM E OF BIG BUTTE.

Site location context

Political divisions (FIPS codes)

Silver Bow(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Butte North(quadrangle 1:24,000 scale)

Butte North(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Clark Fork(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 Silver Bow

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 003N 008W 13,12 Montana

Comments on the location information

  • N OF ORIGINAL AND PARROTT MINES. W STEWARD IS THE MAIN SHAFT.

Commodities

Commodity Importance
Copper Primary
Silver Primary
Gold Primary
Zinc Critical Secondary
Barium-Barite Critical Tertiary
Arsenic Critical Tertiary
Fluorine-Fluorite Critical Tertiary

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Enargite Ore
Sphalerite Ore
Tennantite Ore
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Main Stage Hydrothermal Alteration

Analytical data

Result AVERAGE ORE ASSEMBLAGE FROM THE DEEP LEVELS ARE ABOUT 40% BORNITE, 30% CHALCOPYRITE, 15% TENNANTITE, 10% ENARGITE, 5% CHALCOCITE.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Butte Quartz Monzonite (Boulder Batholith)(Boulder Batholith) (Boulder Batholith)
    Rock description Butte Quartz Monzonite (Boulder Batholith)(Boulder Batholith) (Boulder Batholith)
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Aplite
    Rock description Aplite

Nearby scientific data

(1) -112.53645, 46.01879
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith
Type of structure Local
Structure description Rarus Fault

Controls for ore emplacement

  • Steward Vein System And Fault System With Ne Orientation

Comments on the geologic information

  • POST-MINERAL. RARUS FAULT CUTS NE THROUGH MINE, DIPPING NW, OFFSETTING MAIN STAGE VEIN MINERALIZATION

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Discovery year 1879
Discoverer W. A. Clark
Year of first production 1880

Mining district

District name Butte District

Ownership information

  • Type Operator
    Owner The Anaconda Co., Butte, Montana
  • Type Owner
    Owner The Anaconda Co. Butte, Montana 59701

Workings at the site

  • Type of workings Underground
    Overall depth 1402.08M

Comments on the workings information

  • IN 1973 9 LEVELS WERE ACTIVE: THE 3400, 3800, 3900, 4000, 4100, 4200, 4400, 4500, AND 4600.

Reference information

Bibliographic references

  • Deposit

    MILLER, R. N., ED., 1973, GUIDEBOOK FOR THE BUTTE FIELD MEETING, PRESENTED BY THE SOCIETY OF ECONOMIC GEOLOGISTS.

  • Deposit

    USGS PP 74, P. 147-51.

  • Deposit

    MBMG BULL 109, P. 20

  • Production

    USGS PP 74.

General comments

Subject category Comment text
Deposit E END OF MINE A LEAN QUARTZ-PRYRITE VEIN (BAILEY VEIN) WAS DEVELOPED. IT HAS A NW STRIKE. ON THE 400 FT LEVEL THE BAILEY VEIN IS CUT OFF BY THE STEWARD FAULT VEIN. BELOW THIS AT THE 600, 700 AND 800 FT LEVEL THE ACQUISITION VEIN. IT STRIKES N75E AND DIPS 70 S. THE STEWARD VEIN ON THE 900 FT LEVEL IS E-W ON THE 1100 FT LEVEL IT IS N 75 E. THE STEWARD VEIN IS CUT AND OFFSET IN THE LEFT-LATERAL SENSE BY SEVERAL SYSTEMS OF NW OR BLUE AGE VEINS STRIKING N40-60W AND DIPPING 35-70 SW (F.W. STEWARD VEIN). THE H.W. STEWARD VEIN THAT STRIKES N80E AND DIPS 30-40 SE IS OFFSET LEFT LATERALLY ALL EARLIERS SYSTEMS. THERE ARE THE BLUE AGE VEINS STRIKING N40-60W AND IPPING 35-90 SW ALSO.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1976 Mlynarczyk, Meg S.; Krohn, D. U.S. Geological Survey
Updater 01-NOV-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.

External references

Maps centered on this site