Boulder Mine

Past Producer in Jefferson county in Montana, United States with commodities Gold, Silver, Zinc, Lead, 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. 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. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10015884
MRDS ID DB02159
Record type Site
Current site name Boulder Mine

Geographic coordinates

Geographic coordinates: -112.28921, 46.27879 (WGS84)
Relative position 2.0 KM NW OF BASIN. LAT LONG ON LOWER TUNNEL.

Site location context

Political divisions (FIPS codes)

Jefferson(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Basin(quadrangle 1:24,000 scale)

Butte North(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Boulder(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 Jefferson

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 006N 006W 12,13 SW OF SE (12); NW OF NE (13) Montana

Comments on the location information

  • ON SE SLOPE OF POLE MT. ; INFO FROM LAND.ST :(1954)

Commodities

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

Comments on the commodity information

  • ORE DESCRIBED AS HEMATITE CONTAINING AURIFEROUS PYRITE AND "FREE GOLD"

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Malachite Ore
Sphalerite Ore
Limonite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Oxidized (Oxidation Of Sulfide Minerals)

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name Lowland Creek Volcanics (Boulder Batholith);Butte Quartz Monzonite
    Rock description Lowland Creek Volcanics (Boulder Batholith);Butte Quartz Monzonite
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) -112.28921, 46.27879

Economic information

Geologic structures

Type of structure Local
Structure description Fault Zone Trends N75w, Dips 70-85 S

Ore body information

  • Strike N68W-EW
    Dip STEEPLY TO S
    Width 4.57M

Controls for ore emplacement

  • Fault Zone That Cuts Quartz Monzonite

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1881

Mining district

District name Basin (Cataract, Comet) District

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner James P. Bragg
  • Type Owner
    Owner James Bragg

Comments on the production information

  • PRODUCING 1961.

Workings at the site

  • Type of workings Unknown
    Length 2438.4M
    Overall depth 48.77M

Comments on the workings information

  • TWO ADITS, DRIFTS AND CROSSCUTS: MOST WORKING ACCESSIBLE IN 1960 WORKINGS EPLORE THE DEPOSIT THROUGH A HORZONTAL RANGE OF 1300 FT AND A VERTICLE RANGE OF 160 FT. SOME TRENCHES.

Comments on development

  • FORMERLY OWNED BY THE BASIN GOLD FIELDS, LTD.

Reference information

Bibliographic references

  • Deposit

    MBMG BULL 16, P. 22, 24, 100.

  • Deposit

    USGS BULL 1151, P. 100, PL. 1.

  • Deposit

    MBMG BULL 33, P. 13

  • Production

    MBMG BULL 16, USGS BULL 1151.

General comments

Subject category Comment text
Deposit 3 OR MORE FISSURE VEINS. VEIN HAS BEEN INTRUDED AND SPLIT ALONG ITS STRIKE BY A QUARTZ LATITE DIKE ABOUT 500 FT LONG AND 50 FT THICK.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1979 Elliott, James E. 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