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  3. Mineral Resource Data System (MRDS)

Ledge Mine

Past Producer in Humboldt county in Nevada, United States with commodity 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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Production statistics
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10045046
MRDS ID M232701
Record type Site
Current site name Ledge Mine
Alternate or previous names January, Johnson, Paradise, Wild Horse

Geographic coordinates

Geographic coordinates: -117.62791, 41.35822 (WGS84)
Elevation 1676
Relative position EAST SIDE OF SANTA ROSA MOUNTAINS

Site location context

Political divisions (FIPS codes)

Humboldt(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Paradise Well(quadrangle 1:24,000 scale)

Osgood Mountains(quadrangle 1:100,000 scale)

McDermitt(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Little Humboldt(hydrologic unit)

Humboldt(hydrologic accounting unit)

Black Rock Desert-Humboldt(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 Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 040N 039E 07 Nevada

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Scheelite Ore

Analytical data

Result ORE AVERAGED FROM 0.6 TO 1.4 % WO3

Mineral occurrence model information

Model code 42
USGS model code 14a
Deposit model name W skarn

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Metamorphic Rock > Skarn (Tactite)
    Rock unit name Winnemucca Formation
    Rock description Winnemucca Formation

Nearby scientific data

(1) -117.62791, 41.35822
ListMap

Economic information

Controls for ore emplacement

  • Igneous Contact

Economic information about the deposit and operations

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

Mining district

District name Shon District

Land status

Ownership category BLM Administrative Area

Production statistics

  • Year 1944
    Material ORE W
    Accuracy Accurate
    Description Ap_Grade: ^Up To 1.4 % Wo3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Ore Tungsten Tungsten 1wt-pct
  • Year 1944
    Period 1943-44
    Material WO3
    Accuracy Estimate
    Description Cp_Grade: ^0.6-1.4 Percent Wo3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Tungsten Tungsten 1wt-pct
  • Year 1955
    Material WO3
    Accuracy Accurate
    Description Ap_Grade: ^Average 0.6-0.9 % Wo3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Wo3 Tungsten Tungsten 1wt-pct

Workings at the site

  • Type of workings Unknown
    Length 91.44M

Comments on the workings information

  • 300-FT ADIT.

Comments on development

  • FIRST EXPLORED PRIOR TO 1943 BY A 300 FT ADIT, PROBABLY FOR PRECIOUS METALS. IN 1943-44 THE JANUARY CLAIMS WERE OWNED BY W.E. JOHNSON, WHO SHIPPED 35 TONS OF ORE. IN 1955 SEVERAL LESSEES SHIPPED ORE FROM THE WILD HORSE CLAIMS. MORE WORK WAS DONE IN 1976 WITH NO REPORTED PRODUCTION.

Reference information

Bibliographic references

  • Deposit

    1979 MILS DATA.

  • Deposit

    WILLDEN, R., 1964, GEOLOGIC MAP OF HUMBOLDT COUNTY, NEVADA; NBMG, BULL. 59, PL. 1.

  • Deposit

    STAGER, H.K. AND TINGLEY J.V, IN PREPARATION, NBMG BULL ON TUNGSTEN DEPOSITS OF NEVADA.

  • Production

    NBM BULL., STAGER, H.K. (IN PREP JAN. 1984)

General comments

Subject category Comment text
Deposit SCHEELITE-BEARING TACTITE OCCURS IN 2 THIN BEDS INTERBEDDED WITH HORNFELS NEAR GRANODIOTITIC INTRUSIVES. THESE BEDS EXPOSED IN A 300-FT ADIT WERE ESTIMATED (IN 1944) TO AVERAGE FROM 0.75 TO 1.0 % WO3. NINE TONS OF ORE SHIPPED IN 1944 AVERAGED 1.4 % WO3. THE ORE SHIPPED IN 1955 AVERAGED FROM 0.6 TO 0.9 % WO3.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-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.