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  3. Mineral Resource Data System (MRDS)

Index Mine

Past Producer in Madison county in Montana, United States with commodities Gold, Silver
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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. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10019957
MRDS ID DC12053
Record type Site
Current site name Index Mine

Geographic coordinates

Geographic coordinates: -112.51671, 45.61296 (WGS84)
Elevation 1853
Relative position 0.5 MILE WEST OF ROCHESTER

Site location context

Political divisions (FIPS codes)

Madison(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nez Perce Hollow(quadrangle 1:24,000 scale)

Butte South(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Big Hole(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Montana Madison

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 002S 007W 31 Montana

Comments on the location information

  • SE 1/4, SW 1/4, SECTION 31

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Limonite Gangue
Quartz Gangue

Alteration

  • (Local) Oxidation

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Pre Belt
    Rock description Pre Belt
    Stratigraphic age (youngest) Neoarchean
    Stratigraphic age (youngest) Neoarchean

Nearby scientific data

(1) Quartzofeldspathic gneiss
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Rochester Fault Trends N50w.

Ore body information

  • General form IRREGULAR LENSES
    Strike N 60 W
    Dip 60 SW
    Length 1524M
    Width 0.3M
    Depth to top 0M

Controls for ore emplacement

  • Fissure Zone

Economic information about the deposit and operations

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

Mining district

District name Rochester District

Land status

Ownership category Private

Comments on the workings information

  • INCLINED SHAFT. CONSIDERABLE STOPING OF OXIDIZED ORE TO NEAR SURFACE

Reference information

Bibliographic references

  • Deposit

    MBMG MEM 19, P. 45.

  • Deposit

    CONSV. DIV. COMP. DATE, 05-22-1963

General comments

Subject category Comment text
Deposit THE INDEX VEIN IS PERSISTANT BUT NARROW AND IRREGULAR IN WIDTH.

Reporter information

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

External references

Maps centered on this site