Sheridan

Past Producer in Madison county in Montana, United States with commodities Gold, Silver, Copper, Lead
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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Economic information about the deposit and operations
  13. Land status
  14. Production statistics
  15. Reserves and resources
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10124495
MRDS ID W016881
MAS/MILS ID 0300570361
Record type Site
Current site name Sheridan

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -112.12087, 45.5488 (WGS84)
Elevation 2341

Site location context

Political divisions (FIPS codes)

Madison(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Noble Peak(quadrangle 1:24,000 scale)

Butte South(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Ruby(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Beaverhead-Deerlodge National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Montana Madison

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 003 S 004 W 29 Montana

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Secondary
Lead Tertiary

Materials information

Materials Type of material
Pyrite Ore
Tetrahedrite Ore
Galena Ore
Cerussite Ore
Chalcopyrite Ore
Covellite Ore
Sphalerite Ore
Chromite Ore

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 > Schist
    Rock type qualifier SCHIST, GNEISS, MARBLE
    Rock unit name CHERRY CREEK SERIES
    Stratigraphic age (youngest) Archean
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granodiorite
    Rock unit name TOBACCO ROOT BATHOLITH
    Stratigraphic age (youngest) Cretaceous

Nearby scientific data

Ore Body (1) -112.12087, 45.5488

Economic information

Geologic structures

Type of structure Regional
Structure name TOBACCO ROOT BATHOLITH

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant Yes

Comments on exploration

  • QUARTZ VEINS DISCOVERED 1864, MILLS BUILT 1865. STEADY PRODUCTION THRU 1952. CHROMITE DISCOVERED AROUND 1930, FE DEPOSITS EXAMINED 1940'S-1950'S

Land status

Ownership category National Forest

Production statistics

  • Year 1959
    Period 1901-1959
    Material ore
    Ore mined 281000mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace AG Silver Silver 20mt
    Trace PB Lead Lead 4mt
    Major AU Gold Gold 3mt
    Trace CU Copper Copper 1mt

Reserves and resources

  • Type In-situ
    Estimate year 1979
    Total resources 2700000mt ore

Comments on the workings information

  • EXTENSIVE UNDERGROUND WORKINGS IN LODE MINES, PITS AND TRENCHES ON FE AND CR DEPOSITS

Reference information

Bibliographic references

  • Deposit

    USBM IC 6972, 1937, P61, MAP.

  • Deposit

    USBM-MRB 73, 1952, PA-16.

  • Deposit

    USGS BULL 574

  • Deposit

    MBMG MEM 9.

  • Deposit

    MBMG MEM 41.

Reporter information

Type Date Name Affiliation Comment
Reporter 14-NOV-1983 Western Field Operations Center (WFOC) U.S. Bureau of Mines

Beyond USGS

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