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Free Coinage Mine

Past Producer in Jefferson county in Montana, United States with commodities Silver, Lead, Zinc, Gold, Copper
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Economic information about the deposit and operations
  12. Mining district
  13. Ownership information
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10019816
MRDS ID DC11629
Record type Site
Current site name Free Coinage Mine
Alternate or previous names Little Alma Mine

Geographic coordinates

Geographic coordinates: -112.03338, 46.48601 (WGS84)
Relative position 10.6KM N OF JEFFERSON CITY.

Site location context

Political divisions (FIPS codes)

Jefferson(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Jefferson City(quadrangle 1:24,000 scale)

Butte North(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Missouri(hydrologic unit)

Upper Missouri(hydrologic accounting unit)

Missouri-Marias(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Montana Jefferson

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 008N;009N 003W;003W 06;31 Montana

Comments on the location information

  • E SIDE OF LUMP GULCH.

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Secondary
Gold Secondary
Copper Secondary

Materials information

Materials Type of material
Gold Ore

Analytical data

Result ORE BETWEEN 1918-20 CONTAINED: 70 OZ/TON AG
Result 8% LB
Result A LITTLE AU. BEFORE 1900: 125OZ/TON AG
Result 5% LB, 11% ZN.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Butte Quartz Monzonite (Boulder Batholith)
    Rock description Butte Quartz Monzonite (Boulder Batholith)
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) -112.03338, 46.48601
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith

Comments on the geologic information

  • W OF FREE COINAGE ACROSS 2000FT OF ALLUVIUM IN LUMP GULCH IS AN IRON-STAINED BRECCIA ZONE ABOUT 1500FT LONG AND ABOUT 50FT WIDE CONTAINING SOME CHALCEDONY. IT PROBALLY IS THE W EXTENSION OF THE FREE COINAGE VEIN.

Economic information about the deposit and operations

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

Mining district

District name Clancy-Lump Gulch District

Ownership information

  • Type Operator
    Owner Amalgamated Silver Co.
  • Type Owner
    Owner Louise Tomlinson
    Home office Danbury, Conn.

Workings at the site

  • Type of workings Underground
    Length 990.6M

Comments on the workings information

  • 2 VERTICAL SHFTS, DRIFTS. WORKINGS ARE NOW CAVED. IT WAS WORKED 2 DIFFERENT TIMES BEFORE 1900, A VERTICAL SHAFT WAS PUT IN BOTH TIMES.

Reference information

Bibliographic references

  • Deposit

    MBMG BULL 16, P. 41-2.

  • Deposit

    USGS PP 428, P. 63, 64, 66.

  • Production

    MBMG BULL 16, P. 42

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-JUN-1981 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.

External references

Maps centered on this site