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  3. Mineral Resource Data System (MRDS)

O'Leary Prospect

Occurrence in Humboldt county in Nevada, United States with commodity Manganese
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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. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10047317
MRDS ID M242600
Record type Site
Current site name O'Leary Prospect

Geographic coordinates

Geographic coordinates: -117.55235, 40.6924 (WGS84)
Elevation 1676
Relative position 20 MILES SOUTH OF GOLCONDA

Site location context

Political divisions (FIPS codes)

Humboldt(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sheep Ranch Canyon(quadrangle 1:24,000 scale)

Winnemucca(quadrangle 1:100,000 scale)

Winnemucca(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Humboldt(hydrologic unit)

Humboldt(hydrologic accounting unit)

Black Rock Desert-Humboldt(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Nevada Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 033N 039E 35 E2 Nevada

Comments on the location information

  • 0.75 MILE NORTH OF BLACK DIABLO MINE . INFO FROM LAND.ST :(1972)

Commodities

Commodity Importance
Manganese Critical Primary

Comments on the commodity information

  • ORE CONSISTS OF VERY FINE GRAINS OF BRAUNITE, PYROLUSITE AND PSILOMELANE UNIFORMLY DISTRIBUTED THROUGHOUT A QUARTZITE GANGUE. IN PLACES MN OXIDES HAVE PARTLY REPLACED THE QUARTZITE SO THAT THE INDIVIDUAL QUARTZ GRAINS APPEAR SMOKEY. INTIMATE ASSOCIATION OF MN OXIDES WITH SILICEOUS GANGUE GREATLY INHIBITED BENEFICIATION OF ORE.

Materials information

Materials Type of material
Psilomelane Ore
Pyrolusite Ore

Analytical data

Result REPRESENTATIVE HEAD SAMPLE ASSAYED 22.9 % MN, 2.1 % FE, 55.8 % SI02, 63.4 % INSOL., 0.039 % P, 1.9 % AL203, NO ZN, 1.06 % BA, 0.1 % CAO.

Mineral occurrence model information

Model code 97
USGS model code 24c
Deposit model name Volcanogenic Mn

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert

Nearby scientific data

(1) -117.55235, 40.6924
ListMap

Economic information

Ore body information

  • General form LENTICULAR
    Dip 25-60
    Thickness 3.05M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Black Diablo District

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Frank O'Leary
    First year 1959

Comments on development

  • OWING TO LACK OF EXPLORATION (AS OF 1959) EXTENT OF MINERALIZATIONWAS UNKNOWN

Reference information

Bibliographic references

  • Deposit

    USBM, 1959, RI 5446, P. 20-21.

  • Deposit

    USBM, 1983, MILS DATA

  • Deposit

    USBM, 1951, R.I. 4754, P. 14-15

General comments

Subject category Comment text
Deposit BRAUNITE AND MN OXIDES INTIMATELY INTERGROWN WITH CHERT AND JASPER. DEPOSIT IS A REPLACEMENT OF SEDIMENTARY ROCKS. FOOTWALL IS SLATE; HANGING WALL IS SILICEOUS WITH LENSES OF JASPER AS MUCH AS 10 FT THICK. INTERBEDDED WITH THE MN OXIDES ARE THIN BEDS OF SILICIFIED SHALE AND LENSES OF JASPER RICH IN HEMATITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1985 La Pointe, D.D. (Tingley, J.V.) 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.