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  3. Mineral Resource Data System (MRDS)

Sierra Mine

Past Producer in Granite county in Montana, United States with commodities Copper, Gold, Silver, Antimony
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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. Economic information about the deposit and operations
  14. Mining district
  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 10019721
MRDS ID DC11227
Record type Site
Current site name Sierra Mine

Geographic coordinates

Geographic coordinates: -113.33982, 46.82933 (WGS84)
Location accuracy 500(meters)
Relative position .5 MI N 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;013N 014W;014W 03;35 Montana

Comments on the location information

  • Political location in record is Granite county. The MRDS location-problem GIS test indicated the lat/long fell in adjacent Missoula county. However, the topo sheet, Google Earth, and County100 coverage plot it 520m inside Granite county. No change is necessary.

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary
Antimony Critical Tertiary

Materials information

Materials Type of material
Gold Ore
Tetrahedrite Ore
Ankerite Gangue
Calcite Gangue
Limonite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Oxidation

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Garnet Stock
    Rock description Garnet Stock
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -113.33982, 46.82933
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

  • Strike N
    Dip 30W
    Length 152.4M
    Width 0.61M

Economic information about the deposit and operations

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

Mining district

District name Garnet (First Chance) District

Comments on the production information

  • SMALL PRODUCTION OF MEDIUM GRADE ORE PRE1916

Workings at the site

  • Type of workings Underground
    Overall depth 85.34M

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit VEIN EXTENDS AT LEAST 500 FT HORIZONTALLY BUT PINCHES OUT AT DEPTH.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-74 Unknown U.S. Geological Survey
Updater 01-APR-81 Wise, Kristine K. (Elliott, James E.) U.S. Geological Survey
Editor 06-AUG-08 Schruben, Paul U.S. Geological Survey Fixed lat/long - county disagreement.

Beyond USGS

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

External references

Maps centered on this site