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Montgomery-Shoshone Mine

Producer in Nye county in Nevada, United States with commodities Silver, Gold
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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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Ownership information
  19. Production statistics
  20. Reserves and resources
  21. Workings at the site
  22. Links to other databases
  23. Bibliographic references
  24. General comments
  25. Reporter information

Geologic information

Identification information

Deposit ID 10044475
MRDS ID M231918
Record type Site
Current site name Montgomery-Shoshone Mine
Alternate or previous names Shoshone-Polaris Mine, Polaris Mine, Polaris Vein, St. Joe-Bullfrog Mine

Geographic coordinates

Geographic coordinates: -116.80922, 36.91329 (WGS84)
Elevation 1231
Relative position ABOUT 1 1/4 MILES NORTHEAST OF RHYOLITE; ABOUT 3 MILES W. OF BEATTY.

Site location context

Political divisions (FIPS codes)

Nye(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Beatty(quadrangle 1:24,000 scale)

Beatty(quadrangle 1:100,000 scale)

Death Valley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Amargosa(hydrologic unit)

Northern Mojave(hydrologic accounting unit)

Northern Mojave-Mono Lake(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States Nevada Nye

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 012S 046E 10 NE OF NE Nevada

Comments on the location information

  • NORTH SLOPE OF MONTGOMERY MOUNTAIN. . INFO FROM LAND.ST :(1972)

Commodities

Commodity Importance
Silver Primary
Gold Primary

Comments on the commodity information

  • THE RATIO AG:AU IS MUCH HIGHER THAN CHARACTERISTIC FOR BULLFROG DISTRICT ORES

Materials information

Materials Type of material
Cerargyrite Ore
Gold Ore
Calcite Gangue
Kaolinite Gangue
Limonite Gangue
Pyrite Gangue

Alteration

  • (Local) Locally Strong Silicification As Quartz Flooding; Some Argillization And Alunite Along Shears.

Analytical data

Result HISTORICALLY, AG:AU RATIO WAS 25:1
Result AG:AU RATIO IN 1989 APPROX. 8:1.

Mineral occurrence model information

Model code 150
USGS model code 25c
Deposit model name Epithermal vein, Comstock
Mark3 model number 16

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -116.80922, 36.91329
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Detachment Faulting.
Type of structure Local
Structure description Ore Occurs In Part Along The Ne-Striking Montgomery-Shoshone Fault. This Fault Has An Apparent Normal Displacement Of 3,500 Ft.

Ore body information

  • Strike N-S
    Dip 45W
    Thickness 91.44M
    Length 1219.2M

Controls for ore emplacement

  • Principal Orebody In Brecciated Area Between Two North-Striking Listric Normal Faults At Their Intersection With The Ne-Striking Montgomery-Shoshone Fault. Ore Is Typically In Quartz-Calcite Veins, Along Listric Normal Faults And Tear Faults, And Along Hanging Wall And Footwall Stockworks. The Stockwork Ore Is Controlled By Brittlely Deformed Rocks.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1904
Year of first production 1905
Production years 1904-1911, 1989- PRESENT (11/91)

Mining district

District name Bullfrog District

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Bond Gold Corp.
    Home office P. O. Box 519 Beatty, Nv 89003

Production statistics

  • Year 1911
    Period 1905-1911
    Material ORE AU AG
    Accuracy Estimate
    Description Cp_Grade: ^0.52 Opt Au Equivalent Grade.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 15g/mt

Reserves and resources

  • Type In-situ
    Estimate year 1989
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 2.032 g/mt Silver Major 1989

Comments on the reserve resource information

  • FIGURES ARE FOR COMBINED MONTGOMERY-SHOSHONE AND BULLFROG PITS-ABOUT A MILE APART.

Workings at the site

  • Type of workings Surface/Underground
    Length 2743.2M
    Overall depth 182.88M

Comments on the workings information

  • HISTORIC WORKINGS CONSIST OF 600 FT. DEEP SHOSHONE SHAFT AND 300 FT. DEEP POLARIS SHAFT WITH 9000 FT. OF WORKINGS. DEVELOPED AS AN OPEN PIT BY BOND GOLD.

Comments on development

  • ACQUIRED BY ST. JOE IN 1982 AND EXPLORATION DRILLING BEGAN IN SEPTEMBER 1983. BY 1985 A MINERAL INVENTORY HAD BEEN DEVELOPED, METALLURGICAL TESTING WAS COMPLETED, AND AN OPEN PIT MINE WAS DESIGNED. ST. JOE PLANNED (2/88) TO BEGIN CONSTRUCTION IN JUNE, 1988, WITH PRODUCTION TO BEGIN IN MAY, 1989. IN APRIL 1988, 8 DRILL RIGS WERE ACTIVE ON THE PROPERTY IN PRE-PRODUCTION. EXPLORATION IN THE VICINITY BASED ON THE MONTGOMERY-SHOSHONE MODEL LED TO THE DISCOVERY OF WHAT BECAME KNOWN AS THE BOND GOLD BULLFROG DEPOSIT (RECORD #RE00023). ; ECON.COM: OPEN PIT MINE DEVELOPED IN CONJUNCTION WITH THE BOND GOLD BULLFROG MINE.

Reference information

Bibliographic references

  • Deposit

    RANSOME, F.L., ET AL, 1910, GEOLOGY AND ORE DEPOSITS OF THE BULLFROG DISTRICT: USGS BULL. 407, P. 104-111.

  • Deposit

    KRAL, V.E., 1951, MINERAL RESOURCES OF NYE CO.: NBMG BULL. 50, P. 32-34.

  • Deposit

    BLM, 1988, PUBLIC SCOPING DOCUMENT FOR PROPOSED BULLFROG/MONTGOMERY-SHOSHONE PROJECT.

  • Deposit

    TINGLEY, J.V., 1988, NBMG FIELD EXAMINATION AND SAMPLE ANALYSIS.

  • Deposit

    NBMG, 1988, THE NEVADA MINERAL INDUSTRY 1987, NBMG SPECIAL PUBLICATION MI-1987.

  • Deposit

    JORGENSEN, D.K., 1987, GEOLOGY OF THE MONTGOMERY-SHOSHONE GOLD DEPOSIT, NYE CO., NV: IN GSN SYMPOSIUM FIELD TRIP GUIDEBOOK.

  • Deposit

    JORGENSEN, D.K., ET AL, 1989, GEOLOGY, ALTERATION AND MINERALOGY OF THE BULLFROG DEPOSIT, SOCIETY OF MINING ENGINEERSREPRINT NUMBER 89-135.

  • Deposit

    NBMG, 1994, MI-1993

  • Production

    JORGENSEN, D.K., ET AL, 1989, GEOLOGY, ALTERATION AND MINERALOGY OF THE BULLFROG DEPOSIT, SIETY OF MINING ENGINEERS PREPRINT NUMBER 89-135.

  • Reserve-Resource

    BLM, 1988, PUBLIC SCOPING DOCUMENT FOR PROPOSED BULLFROG/MONTGOMERY-SHOSHONE PROJECT. NBMG MI-1993

General comments

Subject category Comment text
Deposit DURING UNDERGROUND MINING, MOST OF THE ORE PROBABLY CAME FROM ABOVE THE 300 FT LEVEL. THE BEST ORE FROM "GLORY HOLE" AREA, SOME OF WHICH REPORTED TO ASSAY $700/TON.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1981 Wong, George (Roberts, Ralph) U.S. Geological Survey
Updater 01-DEC-1988 La Pointe, D.D. Nevada Bureau of Mines and Geology
Updater 01-NOV-1991 Phinisey, J. D. (Marcus, S.) U.S. Geological Survey
Updater 01-SEP-1994 Li, Zhiping (Moyer, Lorre A.) 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

Authoritative Nevada resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.