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Cornucopia

Producer in Elko county in Nevada, United States with commodities Gold, Silver, Copper, Zinc
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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. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10106928
MRDS ID M232838
Record type Site
Current site name Cornucopia
Alternate or previous names Leopard

Geographic coordinates

Geographic coordinates: -116.29372, 41.53407 (WGS84)

Site location context

Political divisions (FIPS codes)

Elko(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cornucopia Ridge(quadrangle 1:24,000 scale)

Bull Run Mountains(quadrangle 1:100,000 scale)

McDermitt(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork Owyhee(hydrologic unit)

Middle Snake-Boise(hydrologic accounting unit)

Middle Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management NV)

Bureau of Land Management NV BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Nevada Elko

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 042N 051E 18;19 Nevada

Comments on the location information

  • INFO FROM LAND.ST :1982

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Argentite Ore
Pyromorphite Ore
Tetrahedrite Ore
Clay Gangue
Pyrite Gangue

Alteration

  • (Local) Locally Sericitic Near Veins, Minor Chlorite

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) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene

Nearby scientific data

(1) -116.29372, 41.53407
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Four Sets Of Faults

Ore body information

  • General form TABULAR

Controls for ore emplacement

  • Sheeted Zones

Comments on the geologic information

  • THE ORE VEINS OCCURR ONLY IN SHEETED ZONES OF ANDESITE PORPHYRY. THESE ZONES OCCUR ALONG ALL FOUR SETS OF FAULTS WHICH TRANSECT THE AREA. THE ANDESITE IS HIGHLYALTERED NEAR THE FAULTS. POST MINERAL MOVEMENT HAS CUT OFF THE VEIN TO THE NORTH. MAIN DUMPS BELOW MILLSITE CONSIST (1982) OF A MIXTURE OF QUARTZ VEIN, SILICIFIED ANDESITE AND QUARTZ VEIN/ANDESITE BRECCIA. ALL SAMPLES CONTAIN DISPERSED SULFIDES, MOSTLY PYRITE, WITH A BANDED APPEARANCE, AND SHOWING FE-STAINED VUGS AND DISPERSED SULFIDES. SOME ARGILLIZED ANDESITE WITH CLOTS, LENSES OR VEINS OF FINE-GRAINED PYRITE AND SOME FE-SILICA-CEMENTED QUARTZ VEIN BRECCIA WAS ALSO INCLUDED IN SAMPLE. THE ANDESITE HOST HAS A PORPHYRITIC TEXTURE WITH PLAGIOCLASE PHENOCRYSTS SET IN AN ALTERED GREY TO LIGHT GREEN CRYSTALLINE MATRIX. THE CAVED STOPE BEHIND THE MILLSITE EXPOSES BLEACHED, ARGILLIZED, KAOLINIZED, SILICIFIED ANDESITE. THE ROCK IS HIGHLY FRACTURED AND FE-STAINED. THE STOPE FOLLOWS AN FE-STAINED FAULT WHICH STRIKES N15W, 60SW, FOLLOWED
  • BY MINED-OUT LEOPARD VEIN. SOME HEMIMORPHITE OBSERVED IN GOSSAN HERE. NUMBER OF CORE BOXES IN CORE SHED INDICATES OVER 20 EXPLORATION HOLES DRILLED TO 300-400 FT. DRILLING WAS DONE BY SPARTAN EXPLORATIONS LTD, SUMMER, 1974

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Cornucopia

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Mine Tek, Scott Jolcover, Gen Mgr
    Home office P.O. Box 237, Dayton, Nv 89403
  • Type Owner
    Owner James Dodge, Roy Pike, And Standard Ag Inc

Comments on the production information

  • UNKNOWN AMOUNT

Comments on the workings information

  • 2 SHAFTS; NUMEROUS CUTS . IN 1982, SHAFTS WERE CAVED AND AREA AROUND MINES WAS COVERED BY REWORKED WASTE DUMPS. REMAINS OF MILLSITE ABOVE SHAFT, IN ADDITION TO MODERN TRAILER AND CORE SHED. DRILL ROADS COVER HILLSIDE SOUTH AND EAST OF MILLSITE AND IN VICINITY OFOLD SHAFTS.

Comments on development

  • CENTER OF DISTRICT IS PATENTED. LISTED AS AN ACTIVE MINE IN 1983, EMPLOYING 10 PERSONS, HEAP LEACH, CYANIDATION.

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    GRANGER A.E., (1957) MINERAL RESOURCES OF ELKO CO., NEV., NEV. BUR. OF MINES BULL. 54

  • Deposit

    ENG AND MIN JOUR, MARCH AND JUNE, 1974.

  • Deposit

    COATS, 1967, USGS CIRC 549.

  • Deposit

    BENTZ, J. AND SMITH, P., 1982, FIELD EXAMINATION REPORT, 8/19/82.

  • Production

    SMITH, R.M.(1976)

General comments

Subject category Comment text
Deposit THE LARGEST MINE IN THE DISTRICT, DEVELOPMENT CONSISTED OF TWO SHAFTS AND NUMEROUS CUTS. THE SHAFTS ARE NOW CAVED. MUCH OF THE AREA IS NOW COVERED BY MINE DUMPS. SURFACE CHIP SAMPLING IN 1973 INDICATED DISSEMINATED GOLD-SILVER OVER A BROAD AREA IN THE VICINITY OF THE LEOPARD VIEW. EXPLORATION BY TRENCHING REVEALED OPEN-PIT MINING MAY BE FEASIBLE (SMITH 1976 P.47) ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV
Deposit SHEETED ZONES IN ANDESITE PORPHYRY OCCUR ALONG 4 SETS OF FAULTS TRANSECTING THE AREA.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1979 Kirkham, Richard A. Nevada Bureau of Mines and Geology
Updater 01-OCT-1984 La Pointe, D.D. (Tingley, J.V.) Nevada Bureau of Mines and Geology

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.