Bonanza Mine

Past Producer in Powell county in Montana, United States with commodities Gold, Silver, Lead, Zinc, Copper, Arsenic, Antimony
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 10019598
MRDS ID DC10916
Record type Site
Current site name Bonanza Mine

Geographic coordinates

Geographic coordinates: -112.57089, 46.37934 (WGS84)
Location accuracy 250(meters)
Relative position ABOUT 12 KM E OF DEERLODGE.

Site location context

Political divisions (FIPS codes)

Powell(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Baggs Creek(quadrangle 1:24,000 scale)

Butte North(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Clark Fork(hydrologic unit)

Pend Oreille(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(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 Powell

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 007N 008W 11 NW OF NW Montana

Comments on the location information

  • ON LOW RIDGE E OF UPPER COURSE OF ROCKER GULCH. ; INFO FROM LAND.ST :(1959)

Commodities

Commodity Importance
Gold Primary
Silver Primary
Lead Primary
Zinc Critical Secondary
Copper Secondary
Arsenic Critical Tertiary
Antimony Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Sphalerite Ore
Tetrahedrite Ore
Ankerite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Includes Silicification And Pyritization And Minor Argillization And Sericitization. Porphyritic Basalt Has Been Kaolinized And Bleached.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
    Rock unit name Elkhorn Mountain Volcanics
    Rock description Elkhorn Mountain Volcanics
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt

Nearby scientific data

(1) -112.57089, 46.37934

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith

Ore body information

  • Strike N30-40W
    Dip 10-25NE
    Width 6.1M

Controls for ore emplacement

  • Bedding Plane Fissure

Comments on the geologic information

  • LOW ANGLE REVERSE FAULTS ; GEOL.DESC: QUARTZ, PYRITE, ARSENOPYRITE, ANKERITIC CARBONATE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1895
Discoverer W. T. Zosell
Year of last production 1960

Mining district

District name Emery (Zosell) District

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Zosil
    Home office Deer Lodge. Mt.

Comments on the production information

  • $200,000

Comments on the reserve resource information

  • THE INTERSECTION OF THE EMMA DARLING AND THE BONANZA-HIDDEN HAND VEIN MIGHT BE INVESTIGATED.

Workings at the site

  • Type of workings Underground
    Length 1301.5M
    Overall depth 103.63M

Comments on the workings information

  • 2 COMPARTMENT SHAFT, DRIFTS, 400 FT DRAINAGE TUNNEL THAT DID NOT REACH MAIN UNDER GROUND WORKINGS FROM LITTLE COTTONWOOD GULCH. AT LEAST 8 LEVELS. LARGEST SHOOT KNOWN AS THE RED STOPE OCCURS BETWEEN FIFTH AND THIRD LEVELS.

Comments on development

  • 5 PATENTED CLAIMS: BONANZA, HOPE, DAISY, BONANZA EXTENSION, EDSON

Reference information

Bibliographic references

  • Deposit

    MBMG BULL 98, P. 19, 57.

  • Deposit

    MBMG BULL 25, P. 41.

  • Deposit

    MBMG BULL 34, P. 18, 19.

  • Deposit

    USGS BULL 842, P. 279-80.

  • Production

    MBMG BULL 98, P 57.

General comments

Subject category Comment text
Deposit LOCALLY THE VEIN IS A SHEARED ZONE WITH STREAKS OF ORE. IN PLACES IT IS A FILLED BRECCIA. IT CONSISTS OF A SERIES OF RUDELY PARALLEL FRACTURE FILLINGS AND REPLACEMENTS. IT CONTAINS STOCKWORKS, HORSES OF ALTERED WALL ROCK AND IRREGULAR MASSES OF SULFIDE MINERALS ON THE FOOTWALL AND HANGING WALL.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-74 Unknown U.S. Geological Survey
Updater 01-JAN-81 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.