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Duplex Mine

Past Producer in Clark county in Nevada, United States with commodities Gold, Silver, Lead, Copper, Zinc, Molybdenum
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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. 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. Land status
  17. Production statistics
  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 10046990
MRDS ID M242225
Record type Site
Current site name Duplex Mine
Alternate or previous names Ixl Copper Claim

Geographic coordinates

Geographic coordinates: -114.92193, 35.46001 (WGS84)
Elevation 1097

Site location context

Political divisions (FIPS codes)

Clark(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Searchlight(quadrangle 1:24,000 scale)

Davis Dam(quadrangle 1:100,000 scale)

Kingman(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Piute Wash(hydrologic unit)

Lower Colorado(hydrologic accounting unit)

Lower Colorado(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Nevada Clark

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 28S 63E 34 SE4 Nevada

Comments on the location information

  • ON THE HILL SOUTH OF SEARCHLIGHT

Commodities

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

Materials information

Materials Type of material
Calamine Ore
Chalcopyrite Ore
Galena Ore
Limonite Ore
Wulfenite Ore
Hemimorphite Gangue
Mottramite Gangue

Analytical data

Result AVERAGE METAL CONTENT PER SHIPMENT WAS 3.97 OZ/T AG,11.97 % PB, 2.9 % CU, 1.63 % ZN. AVERAGE METAL CONTENT OF LOT S CONTAINING OVER 20 % PB WAS 4.45 OZ/T AU, 13.91 OZ/T AG, 36.34 % PB, 1.42 % CU, 1.63 % ZN.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -114.92193, 35.46001
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Normal Faults (Fault Horses Occur Within The Vein)

Ore body information

  • General form TABULAR
    Strike N60W N8W
    Dip VARIABLE 32-47W 10-25W
    Length 48.77M
    Width 3.05M

Controls for ore emplacement

  • Regional Fracturing In Less Competent Rocks Around The Border Of The Quartz Monzonite Body.

Comments on the geologic information

  • EXPLORATION EAST OF THE FAULT DOES NOT SEEM TO BE COMPLETE (1939) . MOST PRODUCTIVE PARTS OF THE VEIN WERE THOSE THAT WERE NEARLY HORIZONTAL.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1897
Discoverer G.F. Colton (Located As The Ixl Copper Mine Origenally)
Year of first production 1898

Mining district

District name Searchlight

Land status

Ownership category Private

Production statistics

  • Year 1907
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^2.15 Oz Au & 9.96 Oz Ag/Ton, 26% Pb, 2.4% Cu.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 281g/mt
    Major Ore Gold Gold 61g/mt
    Major Ore Copper Copper 2wt-pct
    Ore Lead Lead 26wt-pct
  • Year 1915
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^1.40 Oz Au & 10 Oz Ag/Ton, 10% Pb, 3.8% Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 4wt-pct
    Ore Lead Lead 10wt-pct
    Major Ore Silver Silver 282g/mt
    Major Ore Gold Gold 40g/mt
  • Year 1916
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^1.32 Oz Au & 6.5 Oz Ag/Ton, 5% Pb, 3.7% Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 4wt-pct
    Ore Lead Lead 5wt-pct
    Major Ore Silver Silver 184g/mt
    Major Ore Gold Gold 37g/mt
  • Year 1917
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^1.5 Oz Au & 4.5 Oz Ag/Ton, 7% Pb, 2.5% Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Copper Copper 3wt-pct
    Major Ore Silver Silver 127g/mt
    Major Ore Gold Gold 42g/mt
    Ore Lead Lead 7wt-pct
  • Year 1918
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^3.5 Oz Au & 5.0 Oz Ag/Ton, 9% Pb, 2.5% Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Lead Lead 9wt-pct
    Major Ore Silver Silver 141g/mt
    Major Ore Gold Gold 99g/mt
    Major Ore Copper Copper 3wt-pct
  • Year 1919
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^2. Oz Au & 7.3 Oz Ag/Ton, 14.3% Pb, 2.7% Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Lead Lead 14wt-pct
    Major Ore Silver Silver 206g/mt
    Major Ore Gold Gold 56g/mt
    Major Ore Copper Copper 3wt-pct

Comments on the production information

  • ORE PRODUCED IN 1903, 1906-1911, 1915-1934 TOTALLING MORE THAN $650000 IN VALUE (1939).

Workings at the site

  • Type of workings Surface
    Overall depth 152.4M

Comments on the workings information

  • WORKINGS ARE ACCESSABLE FROM 3 SHAFTS, NEW YEARS GIFT, FRACTION & SEARCHLIGHT. THE MOST RECENT WORK WAS CARRIED ON THROUGH THE FRACTION SSHAFT. (1959). THERE ARE 8 LEVELS.

Comments on development

  • 1903 IT WAS ONE OF THREE MINES TO HAVE A MILL. 1904-1907 IT WAS OPERATED JOINTLY WITH THE GOOD HOPE MINE BY JOHN BROCKMAN. 1911-1915 IT WAS HELD BY THE HOMESTEAD MINING & MILLING CO.

Reference information

Bibliographic references

  • Deposit

    CALLAGHAM, E, 1939, GEOLOGY OF THE SEARCHLIGHT DIST., CLARK CO., NEV., USGS BULL 906-D, P. 165-172.

  • Deposit

    LONGWELL, C.R., 1965, GEOLOGY AND MINERAL DEPOSITS OF CLARK CO., NEVNEV. BUREAU OF MINES BULL 62, PQ. 201.

  • Deposit

    RANSOME, R.L., 1907, PRELIMINARY ACCOUNT OF GOLDFIELD, BULLFROG AND OTHE MINING DIST. INC SOUTHERN NEVADA, USGS BU.. 303, P.72.

  • Deposit

    TINGLEY, J.V., 1983, FIELD OBSERVATION, NBMG, 4/27/83

  • Deposit

    SCHILLING, J., 1962, NBMG REPORT 2.

  • Production

    CALLAGHAM, E., 1939, GEOLOGY OF THE SEARCHLIGHT DIST, CLARK CO., NEV., USGS BULL 906-D, P. 170-171.

General comments

Subject category Comment text
Deposit DUPLEX MINE INCLUDES 6 PATENTED CLAIMS. ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1983 Lyles, B.F. (Tingley, J.V.) Nevada Bureau of Mines and Geology
Updater 01-MAR-1985 La Pointe, D.D. (Tingley, J.V.) 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.