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Molly Claims

Past Producer in Esmeralda county in Nevada, United States with commodities Tungsten, Molybdenum
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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. 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. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10047192
MRDS ID M242452
Record type Site
Current site name Molly Claims
Alternate or previous names Black Horse Mine, NBMG Sample Site 1074

Geographic coordinates

Geographic coordinates: -118.17038, 38.0266 (WGS84)
Elevation 1667
Relative position 7 MILES BY ROAD WEST OF JUNCTION OF U.S. HGWY. 6 WITH STATE RTE 3A.

Site location context

Political divisions (FIPS codes)

Esmeralda(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Miller Mountain(quadrangle 1:24,000 scale)

Excelsior Mountains(quadrangle 1:100,000 scale)

Walker Lake(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fish Lake-Soda Spring Valleys(hydrologic unit)

Central Nevada Desert Basins(hydrologic accounting unit)

Central Nevada Desert Basins(hydrologic subregion)

Great Basin(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 Esmeralda

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 002N 034E 14 Nevada

Comments on the location information

  • ON N. TRIBUTARY TO PINCMOT CREEK ABOUT ; INFO FROM LAND.ST :(1972)

Commodities

Commodity Importance
Tungsten Critical Primary
Molybdenum Tertiary

Materials information

Materials Type of material
Molybdenite Ore
Powellite Ore
Scheelite Ore

Alteration

  • (Local) Silication,Chloritization

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Early Cambrian
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Hark Less Formation;Campeto;Poleta
    Rock description Hark Less Formation;Campeto;Poleta

Nearby scientific data

(1) -118.17038, 38.0266
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description E-W Trending Anticline?

Ore body information

  • General form TABULAR TO IRREGULAR
    Thickness 18.29M

Controls for ore emplacement

  • Igneous Contact; Fracturing

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1942
Year of first production 1942

Mining district

District name Black Horse District

Land status

Ownership category BLM Administrative Area

Comments on the production information

  • COUNTY'S LEADING PRODUCER OF TUNGSTEN IN 1955, AND MAY HAVE COUNTY'S LARGEST OVERALL PRODUCTION OF TUNGSTEN.

Comments on the workings information

  • WORKING CONSIST OF MAINE ADIT (TRENDING N85E) FOLLOWING BANDS OF GARNET AND EPIDOTE IN SILICIFIED LIMESTONE, AND SEVERAL SMALL PITS.

Comments on development

  • THE BLACK HORSE MINE YIELDED ORE IN 1942 AND IN EARLY & MID-1950'S. IT WAS THE COUNTY'S LEADING TUNGSTEN PRODUCER IN 1955 AND MAY HAVE THE LARGEST OVERALL PRODUCTION

Reference information

Bibliographic references

  • Deposit

    ALBERS,J.P., AND STEWART,J.H., 1972, GEOLOGY AND MINERAL DEPOSITS OFESMERALDA COUNTY, NV; N.B.M.G. BULL 78.

  • Deposit

    SCHILLING,J.H.,1964,TUNGSTEN IN MINERAL AND WATER RESOURSES OF NEVADA; N.B.M.G. BULL 65, P. 155-161

  • Deposit

    SMITH,1982,FIELD EXAMINATION

  • Production

    ALBERS,J.P. AND STEWART,J.H. (1972), P.59

General comments

Subject category Comment text
Deposit SCHEELITE AND POWELLITE ARE DISSEMINATED IN TACTITE LAYERS 20 TO 60 FEET THICK.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1985 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.

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.