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Old Bob Claim Group

Prospect in Humboldt county in Nevada, United States with commodities Gold, Arsenic, 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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10047274
MRDS ID M242551
Record type Site
Current site name Old Bob Claim Group
Alternate or previous names NBMG Sample Site 2629
Related records 10198362

Geographic coordinates

Geographic coordinates: -118.12931, 40.94572 (WGS84)
Elevation 1340

Site location context

Political divisions (FIPS codes)

Humboldt(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gaskell(quadrangle 1:24,000 scale)

Eugene Mountains(quadrangle 1:100,000 scale)

Lovelock(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Quinn(hydrologic unit)

Black Rock Desert(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 036N 034E 35 Nevada

Comments on the location information

  • INFO FROM LAND.ST :(1972)

Commodities

Commodity Importance
Gold Primary
Arsenic Critical Tertiary
Tungsten Critical Tertiary

Materials information

Materials Type of material
Gold Ore
Hematite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Chloritization, Kaolinization In Shear Zone

Analytical data

Result SAMPLE 2629 OF WHITE QUARTZ VEIN WITH HEMATITE AND PYRITE CONTAINS 1.5% FE, 0.03% MG, 0.05% CA, 0.07% TI, 20 PPM MN, 0.5 PPM AG, 7000 PPM AS, 20 PPM B, 5 PPM NI, 15 PPM PB, 10 PPM V, 70 PPM W.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -118.12931, 40.94572
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike N 20 E
    Dip 60 SE
    Thickness 0.3M

Controls for ore emplacement

  • N 20 E, 60 Se Shear Zone

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Mill City District; Central District

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Ocelot Mining Co., Denver, Co.
    First year 1984

Comments on the workings information

  • INCLINE SHAFT 20 FT DEEP, PROSPECT CUTS

Comments on development

  • MOST RECENT ACTIVITY, CLAIM STAKING, MAY, 1984

Reference information

Bibliographic references

  • Deposit

    TINGLEY, J.V., 1984, NBMG FIELD EXAMINATION, 9/20/84

General comments

Subject category Comment text
Deposit SHAFT SUNK ON WHITE QUARTZ VEIN IN SHEAR ZONE IN DIORITE. DIORITE IS MODERATELY CHLORITIZED, KAOLINIZED IN THE SHEAR ZONE. OTHER SMALL PROSPECTS OCCUR ALONG STRIKE OF THE ZONE. IN THE SADDLE TO THE SOUTHWEST. A LARGE OUTCROP OF WHITE QUARTZ OCCURS ON THE CONTACT SHALEY HORNFELS WITH DIORITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-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.