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  3. Mineral Resource Data System (MRDS)

Mac Namara Mining Co.

Past Producer in Nye county in Nevada, United States with commodity Silver
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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. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10044366
MRDS ID M231770
Record type Site
Current site name Mac Namara Mining Co.
Alternate or previous names Mcnamara Shaft

Geographic coordinates

Geographic coordinates: -117.23425, 38.07022 (WGS84)
Elevation 1830
Relative position 0.44 MILES NE OF BROUGHER MTN.

Site location context

Political divisions (FIPS codes)

Nye(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tonopah(quadrangle 1:24,000 scale)

Tonopah(quadrangle 1:100,000 scale)

Tonopah(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Southern Big Smoky Valley(hydrologic unit)

Central Nevada Desert Basins(hydrologic accounting unit)

Central Nevada Desert Basins(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Nevada Nye

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 003N 042E 35 Nevada

Comments on the location information

  • PROPERTY CONSIST OF HALF A CLAIM.

Commodities

Commodity Importance
Silver Primary

Materials information

Materials Type of material
Argentite Ore
Polybasite Ore
Stephanite Ore
Calcite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Rhyolite Altered To Chlorite, Calcite, Pyrite, Quartz, Sericite,Siderite.

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) > Felsic Volcanic Rock > Rhyolite
    Rock unit name West End Rhyolite
    Rock description West End Rhyolite
    Stratigraphic age (youngest) Pliocene

Nearby scientific data

(1) -117.23425, 38.07022
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Macnamara Fault, Rainbow Fault

Ore body information

  • Width 1.83M

Controls for ore emplacement

  • Fault Control

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1901
Discoverer Mathew Macnamara

Mining district

District name Tonopah District

Land status

Ownership category Private

Comments on the workings information

  • WORKINGS CONSIST OF THE 700 FT MCNAMARA SHAFT WITH WORKINGS ON THE 200, 300, 375-FT LEVELS.

Comments on development

  • 1/2 OF A FULL CLAIM

Reference information

Bibliographic references

  • Deposit

    SPURR, J.E., 1905, GEOLOGY OF THE TONOPAH MINING DISTRICT: USGS PROF. PAPER 42, P. 189-191

  • Deposit

    CARPENTER, JA, ET AL, 1953, HISTORY OF FIFTY YEARS OF MINING AT TONOPAH: NBMG BULL. 51

  • Deposit

    NOLAN, TB, 1935, UNDERGROUND GEOL. OF TONOPAH MINING DIST.: NBMG BULL. 23

  • Production

    CARPENTER, ET AL, 1953, P. 149

General comments

Subject category Comment text
Deposit ORE VEIN UP TO 6 FT WIDE; 40-50 FT WIDE LOW-GRADE VEIN MATERIAL.
Deposit THE COMPANY WAS FORMED IN 1901. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-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.