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Roberts Copper Mine

Past Producer in Humboldt county in Nevada, United States with commodities Copper, Gold, Silver, Iron, Tungsten
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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. 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. Production statistics
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10045037
MRDS ID M232689
Record type Site
Current site name Roberts Copper Mine
Alternate or previous names Patterson Property, Cove Meadow Deposit, Ne Plus Ultra Claims Patented, NBMG Sample Site 2442

Geographic coordinates

Geographic coordinates: -118.80795, 41.56404 (WGS84)
Elevation 1783
Relative position 102 MILES NW. OF WINNEMUCCA, BY ROAD

Site location context

Political divisions (FIPS codes)

Humboldt(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

New York Peak(quadrangle 1:24,000 scale)

Denio(quadrangle 1:100,000 scale)

Vya(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Thousand-Virgin(hydrologic unit)

Black Rock Desert(hydrologic accounting unit)

Black Rock Desert-Humboldt(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Nevada Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 042N 028E 18 Nevada

Comments on the location information

  • 3 1/2 MILES NE OF BARTLETT PEAK

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary
Iron Tertiary
Tungsten Critical Tertiary

Materials information

Materials Type of material
Chrysocolla Ore
Copper Ore
Cuprite Ore
Limonite Ore
Magnetite Ore
Malachite Ore

Alteration

  • (Local) Silicification, Chloritization

Analytical data

Result 5.1 % CU IN HAND-SORTED ORE, 1949. SAMPLE 2442 CONTAINS 10 % FE, 2 % MG, 0.07 % CA, 0.15 % TI, 2000 PPM MN, 200 PPM AG, 500 PPM B, 1000 PPM BA, 100 PPM CO, +20000 PPM CU, 10 PPM MO, 20 PPM NI, 5 PPM SC, 300 PPM V, 50 PPM W, 10 PPM Y, 10 PPM ZR, AND 0.1 PPM AU, BY AA ANALYSIS.

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 Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Happy Creek Volcanic Series
    Rock description Happy Creek Volcanic Series

Nearby scientific data

(1) -118.80795, 41.56404
ListMap

Economic information

Ore body information

  • General form TABULAR, LENSES
    Strike N45W
    Dip 50-60NE
    Thickness 10.67M
    Length 914.4M

Controls for ore emplacement

  • Shear Zone; Parallel Fractures; Brecciation

Comments on the geologic information

  • SHEAR ZONE RANGES FROM 3 TO 35 FT THICK AND SEVERAL THOUSANDS OF FEET LONG; SCHISTOSE PROPERTY CONSISTS OF A 4 CLAIMS, PATENTED IN 1883 (NE PLUS ULTRA, CHANCERY, MATCHBOX, AND VULCAN CLAIMS.) AND ONE UNPATENTED CLAIM(THE COVE MEADOW)

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1875
Year of first production 1948

Mining district

District name Varyville District

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner
    Owner Charles Roberts, Caldwell, Id
    First year 1984

Production statistics

  • Year 1949
    Period To 1949
    Material ORE CU AC
    Description Cp_Grade: ^Ave. 5.1% Cu Also Au. Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Copper Copper 5wt-pct

Comments on the production information

  • 46 TONS ORE AT 2.83% CU; 0.005 OZ AU, 1.875 OZ AG; 42 TONS AT 7.5% CU, 0.01OZ AU, 3.3 OZ AG

Comments on the workings information

  • SURFACE CUTS, SHALLOW UNDERGROUND WORKINGS, ONE VERTICAL SHAFT, NUMEROUS DOZER CUTS AROUND SHAFT AND AREA, SHORT ADIT WITH SMALL OPEN PIT DIRECTLY ABOVE IT.

Comments on development

  • HAND-SORTED ORE SHIPPED IN 1948 AND 1949

Reference information

Bibliographic references

  • Deposit

    WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF HUMBOLDT COUNTY, NEVADA; NBMG, BULL. 59.

  • Deposit

    TRENGROVE, R.R., 1950, INVESTIGATION OF THE COVE MEADOW COPPER DEPOSIT, HUMBOLDT COUNTY, NEVADA; USBM REPORT OF INV. 4694.

  • Deposit

    JONES, R.B., 1984, NBMG FIELD EXAMINATION AND SAMPLE ANALYSIS.

  • Deposit

    NBMG STAFF, 1985, NBMG OFR 85-3.

  • Production

    WILLDEN, R., 1964

General comments

Subject category Comment text
Deposit COPPER MINERALIZATION ASSOCIATED WITH DIORITE DIKE WHICH IS IN A FAULT ZONE. COUNTRY ROCK ALSO DIORITE. WIDE-SPREAD COPPER OXIDES.; MODEL NAME COULD ALSO BE: KUROKO MASSIVE SULFIDE.
Deposit OWNED IN 1960'S BY F.W. ROBERTS; EXPLORED BY SEVERAL SURFACE CUTS AND TWO SHALLOW UNDERGROUND WORKINGS. THE USBM DEVELOPED THE PROPERTY BY DIAMOND-DRILLING 7 HOLES IN THE SHEAR ZONE ADJACENT TO THE FAULT. THE PROPERTY WAS PROBABLY DISCOVERED ABOUT THE 1870'S. PLATS OF THE PATENTED CLAIMS ARE DATED JULY 10, 1883. IN 1948, THE WISBY BROTHERS BUILT A ROAD TO THE DEPOSIT, HAND-SORTED THE ORE, AND SHIPPED IT IN NOV. 1948 (46 TONS AT 2.83 % CU 0.005OZ AU, 1.875 OZ AG. A SECOND SHIPMENT OF 4.2 TONS HAND-SORTED ORE WAS MADE JULY 27, 1949 (7.5 % CU, 0.01 OZ AU, 3.3 OZ AG. PROPERTY CONSISTS OF 4 CLAIMS, PATENTED IN 1883 (NE PLUS ULTRA, CHANCERY, MATCHBOX, AND VULCAN CLAIMS.) AND ONE UNPATENTED CLAIM(THE COVE MEADOW) ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV
Deposit Discovery Year: 1870'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1981 La Pointe, D.D. Nevada Bureau of Mines and Geology
Updater 01-MAY-1987 La Pointe, D.D. Nevada Bureau of Mines and Geology
Updater 01-SEP-1994 Li, Zhiping (Peters, S.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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.