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Murphy Mine

Past Producer in Nye county in Nevada, United States with commodities Silver, Gold, Copper, Antimony, Lead, 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. 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. Ownership information
  18. Reserves and resources
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10044392
MRDS ID M231804
Record type Site
Current site name Murphy Mine
Alternate or previous names Ophir Mine, Twin River Mine

Geographic coordinates

Geographic coordinates: -117.28065, 38.94436 (WGS84)
Elevation 2438
Relative position NEAR THE HEAD OF OPHIR CANYON

Site location context

Political divisions (FIPS codes)

Nye(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

South Toiyabe Peak(quadrangle 1:24,000 scale)

Ione Valley(quadrangle 1:100,000 scale)

Tonopah(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Northern Big Smoky Valley(hydrologic unit)

Central Nevada Desert Basins(hydrologic accounting unit)

Central Nevada Desert Basins(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Humboldt-Toiyabe National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Nevada Nye

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 013N 042E 31 Nevada

Comments on the location information

  • UNSURVEYED TOWNSHIP

Commodities

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

Materials information

Materials Type of material
Cerargyrite Ore
Silver Ore
Sphalerite Ore
Stibnite Ore
Tetrahedrite Ore
Pyrite Gangue

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
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Pablo
    Rock description Pablo
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Economic information

Geologic structures

Type of structure Local
Structure description Fault (N75e, 60n) Which Terminates The Vein.

Ore body information

  • General form SEAM, CHIMNEYLIKE BODIES
    Strike N-S
    Dip 45E
    Width 3.66M

Controls for ore emplacement

  • At The Intersection Of Vein And East-Striking Cross Faults.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1863

Mining district

District name Twin River District

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Ophir Canyon Mining Co.
    First year 1937
  • Type Owner
    Owner Lastreta, Mrs. Goldie
    Home office San Francisco, Ca
    First year 1951

Comments on the production information

  • TOTAL PRODUCTION WAS $922,000

Reserves and resources

  • Type In-situ
    Estimate year 1922
    Total resources 5000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 395.299 g/mt Silver Major 1922

Workings at the site

  • Type of workings Underground
    Length 609.6M

Comments on the workings information

  • WORKINGS CONSIST OF A 360 FT (45 DEG) INCLINE SHAFT WITH FOUR LEVELS. AN ADIT AND ANOTHER SHAFT.

Comments on development

  • DISTRICT WAS DISCOVERED IN 1863 BY S. BOULEROND AND A PARTY OF FRENCHMEN. FROM 1866TO 1868, THE VEIN WAS EXPLOITED BY THE TWIN RIVER MINING CO. THE MINE CLOSED AND REOPENED IN 1875. IT OPERATED INTERMITTENTLY UNTIL 1890. IT REOPENED IN 1917, WAS TAKEN OVER BY NEVADA OPHIR CO. IN 1918, AND HAD A SMALL PRODUCTION IN 1923. THE PROPERTY CONSISTS OF 8 CLAIMS.

Reference information

Bibliographic references

  • Deposit

    KRAL, V.E., 1951, MINERAL RESOURCES OF NYE CO.: NBMG BULL. 50, P. 180-184.

  • Deposit

    FERGUSON, H.G. AND CATHCART, S.H., 1954, GEOL. OF THE ROUND MTN. QUAD: USGS GEOL. QUAD. MAP GQ-40.

  • Deposit

    LAWRENCE, EF, 1963, ANTIMONY DEPOSITS OF NEVADA: NBMG BULL. 61, P. 141

  • Production

    KRAL, 1951, P. 181; KLEINHAMPL

General comments

Subject category Comment text
Deposit Discovery Year: 1863-1864

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1980 Wong, George (Roberts, Ralph) U.S. Geological Survey
Updater 01-MAY-1982 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.