Big Twenty Mine

Past Producer in Mineral county in Nevada, United States with commodities Gold, Silver
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. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10045486
MRDS ID M233241
Record type Site
Current site name Big Twenty Mine
Alternate or previous names NBMG # 3784

Geographic coordinates

Geographic coordinates: -118.92569, 38.97213 (WGS84)

Site location context

Political divisions (FIPS codes)

Mineral(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Hussman Spring(quadrangle 1:24,000 scale)

Walker Lake(quadrangle 1:100,000 scale)

Walker Lake(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Walker(hydrologic unit)

Walker(hydrologic accounting unit)

Central Lahontan(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

BIA(Federal land areas administered by BIA)

Geographic areas

Country State County
United States Nevada Mineral

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 013N 027E Nevada

Comments on the location information

  • N END WASSUK RANGE, OF SUMMIT NEAR E-WSPUR RISING ABOVE GRANITE SITE

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Sericitization Of Country Rock

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Granitic Rocks
    Rock description Granitic Rocks
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Granitic Rocks
    Rock description Granitic Rocks

Nearby scientific data

(1) -118.92569, 38.97213

Economic information

Ore body information

  • Thickness 0.61M
    Width 1.22M

Controls for ore emplacement

  • Fractures

Comments on the geologic information

  • GOLD OCCURS IN VEIN IN SMALL IRREGULAR POCKETS

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1904
Discoverer William Wilson
Year of first production 1904

Mining district

District name Mountain View District

Workings at the site

  • Type of workings Underground
    Overall depth 30.48M

Comments on the workings information

  • SEVERAL INCLINED SHAFTS AND A LONG CROSSCUT TUNNEL THREE SHORT ADITS AND A SHAFT

Reference information

Bibliographic references

  • Deposit

    ROSS, 1961, GEOLOGY AND MINERAL DEPOSITS OF MINERAL COUNTY, NEVADA; NBMG BULL. 58

  • Deposit

    HILL, 1915, SOME MINING DISTRICTS IN NORTHEASTERN CALIFORNIA AND NORTHWESTERN NEVADA; USUGS BULL. 594

  • Deposit

    VANDERBURG, 1937, RECONNAISSANCE OF MINING DISTRICTS IN MINERAL COUNTY, NEVADA; USBM IC 6941

  • Deposit

    LINCOLN, 1923, MINING DISTRICTS AND MINERAL RESOURCES OF NEVADA; NEVADA NEWSLETTER PUBLISHING CO.

  • Deposit

    RANSOME, 1908, "THE YERINGTON COPPER DISTRICT, NEVADA";USGS BULL. 380, P. 118

  • Deposit

    TELLURIDE CLAIMS, MOUNTAIN VIEW MINING DISTRICT,MINERAL COUNTY, QUADE SITE VISIT 6-12-89,NBMG UNPUBLISHED MINING DISTRICT FILES (TINGLEY FILES)

General comments

Subject category Comment text
Deposit THREE SUB PARALLEL VEINS, A CONTINUATION OF THE VEIN AT MOUNTAIN VIEW MINE, RANGING FROM A FEW INCHES TO 4 FEET WIDE. THE CROPPINGS OF THE VEINS CONSIST OF IRON-STAINED QUARTZ, UNDERGROUND THEY ARE REPRESENTED BY FRACTURE ZONES, ALONG WHICH THE GRANODIORITE IS SERICITIZED FOR A WIDTH OF 1 TO 2 FEET. SMALL IRON-STAINED QUARTZ STRINGERS CUT THE ALTERED ROCK IN A FEW PLACES, SHOWING SOME MANGANESE STAIN.
Deposit THE MINERALIZATION WAS REPORTED TO BE MAINLY ON THE SOUTHSIDE OF THE DIKE. THE VEIN FILLING WAS DESCRIBED AS A SOFT LIGHT PUMICE-LIKE QUARTZ CONTAINING A LITTLE SULPHUR THOUGHT TO BE A PRODUCT OF THE OXIDATION OF PYRITE.THE DUMPS ARE COVERED WITH PYRITE AND SULPHUR. THE OLD MILL APPEARS TO HAVE TREATED SOME OF THE ORE WHICH IS NOW WITHIN THE WALKER RIVER INDIAN RESERVATION. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1981 Royse, Sue E. Nevada Bureau of Mines and Geology
Updater 01-AUG-1991 Marcus, S. (Doebrich, J.) U.S. Geological Survey

Beyond USGS

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

Authoritative Nevada resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.