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Bootstrap Mine

Producer in Elko county in Nevada, United States with commodities Gold, Silver, Copper, Lead, Zinc, Antimony
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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. Alteration
  8. Mineral occurrence model information
  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. Ownership information
  17. Reserves and resources
  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 10045149
MRDS ID M232818
Record type Site
Current site name Bootstrap Mine
Alternate or previous names Antimony Pete, Antimony Ike
Related records 10295132, 10310520

Geographic coordinates

Geographic coordinates: -116.41704, 41.01879 (WGS84)
Elevation 1743
Relative position 45 KM NW OF CARLIN, NV.

Site location context

Political divisions (FIPS codes)

Elko(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Santa Renia Fields(quadrangle 1:24,000 scale)

Tuscarora(quadrangle 1:100,000 scale)

McDermitt(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Humboldt(hydrologic unit)

Humboldt(hydrologic accounting unit)

Black Rock Desert-Humboldt(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Nevada Elko

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 036N 049E 10 Nevada

Comments on the location information

  • LOCATED ON NORTH SLOPE OF ROUND MTN.

Commodities

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

Alteration

  • (Local) Sericitization, Silicification, Argillization. Dikes Are Sericitized. Within Carbonate Sediments, Cherty Replacement Silicification Along Faults And Joints Diminishes Laterally In Intensity And Grades Into Argillic Alteration. Argillized Zones Grade Into Fresh Country Rock.

Analytical data

Result SEE LAWRENCE 1963 P.60

Mineral occurrence model information

Model code 172
USGS model code 26a
Deposit model name Carbonate-hosted Au-Ag
Mark3 model number 15

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Mudstone
    Rock unit name Bootstrap Limestone;Bootstrap Limestone;Unknown;Unknown
    Rock description Bootstrap Limestone;Bootstrap Limestone;Unknown;Unknown

Nearby scientific data

(1) -116.41704, 41.01879
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Roberts Mountain Thrust Fault
Type of structure Local
Structure description Steep North Trending Faults Intruded By Dikes.

Ore body information

  • General form STOCKWORK

Controls for ore emplacement

  • Ore Localized On A North-Striking, High Angle Fault Developed Along A Competency Contrast Between Massive Devonian Bootstrap Carbonates And Platform-Slope Talus Debris Within The Bootstrap Limestone. West-Dipping, Late Cretaceous To Tertiary Dikes Intruded Along The Fault. Later Tectonism Accentuated Initial Structural Breaks, Enhancing Permeability And Porosity.

Comments on the geologic information

  • DIKES ARE UP TO 15' WIDE. GOLD OCCURS AS MICROSCOPIC PARTICLES ALONG FRACTURES IN THE DIKES, AND IN THE CHERTS & SHALES. WHERE SEVERAL DIKES ARE CLOSELY SPACED THE ORE IS MINEABLE BY OPEN PIT METHODS. LIMESTONE IN CONTACT WITH THE DIKE IS HORNFELSIC AND PARTIALLY MARBLEIZED.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1914
Year of first production 1918
Production years 1918; 1958-1959; 1974-1984; 1987

Mining district

District name Bootstrap; Carlin Trend

Ownership information

  • Type Owner-Operator
    Owner Newmont Exploration, Ltd.
    Home office Carlin, Nv.

Comments on the production information

  • ORE ALSO CONTAINS SOME LEAD AND ZINC, AND A LOAD OF ANTIMONY ORE WAS HAULED TO DUNPHY IN 1914.

Reserves and resources

  • Type In-situ
    Estimate year 1987
    Commodity Subtype Grade units Group Importance Year
    Gold Au 3.388 g/mt Gold Major 1987
  • Type In-situ
    Estimate year 1990
    Total resources 8000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.242 g/mt Gold Major 1990
  • Type In-situ
    Estimate year 1989
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.609 g/mt Gold Major 1989

Comments on the reserve resource information

  • FIGURES FOR 1989 AND 1990 ARE FOR COMBINED BOOTSTRAP AND CAPSTONE DEPOSITS.
  • FIGURES REPRESENT TOTAL COMBINED RESERVES FOR BOTH CAPSTONE AND BOOTSTRAP DEPOSITS USING OVERALL STRIP RATIO OF 2.5:1.

Workings at the site

  • Type of workings Surface/Underground
    Length 158.5M
    Overall depth 7.32M

Comments on the workings information

  • 24-FT. SHAFT, 520-FT. ADIT., OPEN PIT

Comments on development

  • IN 1918, APPROXIMATELY 500 TONS OF STIBNITE ORE WERE SHIPPED TO THE RAILHEAD AT DUNPHY, NV. GOLD PRODUCTION BEGAN IN 1958 WHEN HARRY TREWEEK AND MARION FISCHER BEGAN MINING A SMALL DIKE IMMEDIATELY WEST OF THE PRESENT BOOTSTRAP PIT. IT WAS THE LARGEST GOLD PRODUCER IN ELKO COUNTY IN 1958. THE PROPERTY WAS ACQUIRED BY NEWMONT IN 1967. IN 1969, A DEVELOPMENT DRILLING PROGRAM OF 76 HOLES TOTALLING 4,394 METERS WAS COMPLETED. MINING BEGAN IN 1974, PRODUCING 20,000 OZ. GOLD OVER THE NEXT FIVE YEARS BY MILLING AND HEAP LEACHING. INTERMITTENT MINING OF HIGH GRADE ZONES CONTINUED FROM 1976-1984, PRODUCIING AN ADDITIONAL 100,000 OZ. GOLD.IT WAS LISTED AS AN ACTIVE OPEN PIT MINE EMPLOYING 2 PERSONS IN 1980. HEAP-LEACHING OF LOW GRADE ORE CONTINUING IN 1987 AS WELL AS ADDITIONAL EXPLORATION. INACTIVE IN 1991. ADDITIONAL PRODUCTION LIKELY STARTING IN 1992 WITH THE OPENING OF THE CONTIGUOUS CAPSTONE DEPOSIT.

Reference information

Bibliographic references

  • Deposit

    SMITH, R.M. (1976-56) MINERAL RESOURCES OF ELKO CO. NEV, USGS OPEN-FILE REPORT

  • Deposit

    LAWRENCE (1963) ANTIMONY DEPOSITS OF NEV. NEV BUREAU OF MINES BULL 61.

  • Deposit

    STATE INSPECTOR OF MINES (1981) DIRECTORY OF NEVADA MINE OPERATIONS ACTIVE IN 1980

  • Deposit

    BONHAM, H.F., 1986, BULK-MINEABLE PRECIOUS-METAL DEPOSITS AND PROSPECTS IN NEVADA, NBMG MAP 91.

  • Deposit

    NMBG, 1987, THE NEVADA MINERAL INDUSTRY 1986, NBMG SPECIAL PUBLICATION MI-1986

  • Deposit

    BAKER, E.D., 1991, GEOLOGY AND ORE DEPOSITS OF THE BOOTSTRAP SUBDISTRICT, ELKO COUNTY, NEVADA, IN GEOLOGY AND ORE DEPOSITS OF THE GREAT BASIN, RAINES, G.L., ET AL, EDS., THE GEOLOGICAL SOCIETY OF NEVADA, RENO, P. 619-623.

  • Deposit

    NMBG, 1991, THE NEVADA MINERAL INDUSTRY 1990, NBMG SPECIAL PUBLICATION MI-1990

  • Reserve-Resource

    NMBG, 1987, THE NEVADA MINERAL INDUSTRY 1986, NBMG SPECIAL PUBLICATION MI-1986 NMBG, 1991, THE NEVADA MINERAL INDUSTRY 1990, NBMG SPECIAL PUBLICATION MI-1990

General comments

Subject category Comment text
Deposit GOLD OCCURS AS MICROSCOPIC PARTICLES ALONG FRACTURES IN DIKES, CHERT, AND SHALE.
Deposit MINE MAP IN LAWRENCE (1963) P.59. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1979 Kirkham, Richard A. Nevada Bureau of Mines and Geology
Updater 01-SEP-1988 La Pointe, D.D. (Tingley, J.V.) U.S. Geological Survey
Updater 01-NOV-1991 Phinisey, J. D. (Marcus, S.) 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.