Keystone

Occurrence in Madison county in Montana, United States with commodities Tungsten, Antimony, Copper
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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10094322
MRDS ID D004285
Record type Site
Current site name Keystone
Related records 10294635

Geographic coordinates

Geographic coordinates: -111.95975, 45.57379 (WGS84)
Elevation 2621
Relative position 7 AIR MILES SW OF PONY

Site location context

Political divisions (FIPS codes)

Madison(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Potosi Peak(quadrangle 1:24,000 scale)

Bozeman(quadrangle 1:100,000 scale)

Bozeman(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Jefferson(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 003S 003W 15 Montana

Comments on the location information

  • LOCATED ON SOUTH SLOPE OF RIDGE EXTENDING SE OF POTOSI PEAK OVERLOOKING SOUTH WILLOW CREEK.

Commodities

Commodity Importance
Tungsten Critical Primary
Antimony Critical Tertiary
Copper Tertiary

Materials information

Materials Type of material
Huebnerite Ore
Tetrahedrite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Tobacco Root Batholith-Quartz Monzonite
    Rock description Tobacco Root Batholith-Quartz Monzonite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Pre Belt Pony-Cherry Creek Series
    Rock description Pre Belt Pony-Cherry Creek Series

Nearby scientific data

(1) -111.95975, 45.57379

Economic information

Geologic structures

Type of structure Local
Structure description Nw-Trending Bismark Fault

Ore body information

  • Strike 70-75 NE
    Dip 70 NW

Controls for ore emplacement

  • Tobacco Root Batholith Intrusion Into Prec Pre-Belt Gneiss Series

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Mining district

District name Potosi

Ownership information

  • Type Owner
    Owner J. Flint
    First year 1958

Comments on the production information

  • THE STRAWBERRY-KEYSTONE GROUP IS REPORTED TO HAVE GROSSED $150,000 (1933)

Reference information

Bibliographic references

  • Deposit

    WINCHELL, 1916, MINING DISTRICTS-DILLON QUAD, MONT, USGS BULL 574 P. 125

  • Deposit

    TANSLEY AND HART, 1933, GEOL. RECON-TOBACCO ROOT MTN, MADISON CO., MONT, MBMG MEM 9, P. 32

  • Deposit

    EYDE, 1958, POTOSI TUNGSTEN DIST, MADISON CO, MONT, MBMG. INF. CIRC. 21, P. 43

  • Deposit

    1916 COMPILE WINCHELL, BULL 574

  • Deposit

    1933 RECON MBMG MEM 9

  • Deposit

    1958 COMPILE MBMG INF CIR. 21

  • Production

    TANSLEY, ET AL, P. 26.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1980 Doyle, Brien (Wells, John) U.S. Geological Survey

Beyond USGS

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