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  3. Mineral Resource Data System (MRDS)

Modoc Mine

Past Producer in Silver Bow county in Montana, United States with commodities Copper, Silver, 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. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10014487
MRDS ID D011286
Record type Site
Current site name Modoc Mine

Geographic coordinates

Geographic coordinates: -112.50922, 46.0249 (WGS84)
Location accuracy 500(meters)
Relative position ON THE EDGE OF MINE DUMP

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 007W 08 Montana

Comments on the location information

  • NORTH OF MEADERVILLE

Commodities

Commodity Importance
Copper Primary
Silver Primary
Gold Secondary

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Pyritized

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Boulder Batholith, Butte Quartz Monzonite
    Rock description Boulder Batholith, Butte Quartz Monzonite
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -112.50922, 46.0249
ListMap

Economic information

Ore body information

  • General form LENSES, SHOOTS
    Dip 55 S
    Width 6.1M

Comments on the geologic information

  • THE RYOLITE PORPHYRY FORMS A SERIES OF DIKES, WHICH UNITE AT THE SURFACE, AT TIMES 100 FT WIDE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Butte District

Comments on the workings information

  • 2 SHAFTS

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THE LODE IS A BANDED MIXTURE OF SOLID QUARTZ AND PYRITE WHICH IS WORKABLE ONLY WHERE BROKEN BY FAULTING AND ENRICHED BY SECONDARY GLANCE AND BORNITE. THE VEIN IS BROKEN BY NUMEROUS TRANSVERSE NW FISSURES. THE PAY ORE OCCURS IN SHOOTS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1984 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.

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