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NBMG Sample Site 2628

Past Producer in Humboldt county in Nevada, United States with commodities Gold, Silver, Lead, Arsenic
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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. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10047273
MRDS ID M242550
Record type Site
Current site name NBMG Sample Site 2628
Related records 10222383

Geographic coordinates

Geographic coordinates: -118.09681, 40.90239 (WGS84)
Elevation 1415

Site location context

Political divisions (FIPS codes)

Humboldt(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pronto(quadrangle 1:24,000 scale)

Eugene Mountains(quadrangle 1:100,000 scale)

Lovelock(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower 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 035N 035E 18 Nevada

Comments on the location information

  • INFO FROM LAND.ST :(1972)

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Secondary
Arsenic Critical Tertiary

Materials information

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

Analytical data

Result SAMPLE 2628 OF THE WEST VEIN CONTAINS 3% FE, 0.02% MG, 0.3% CA, .005% TI, 20 PPM MN, 70 PPM AG, 5000 PPM AS, 30 PPM B, 50 PPM BI, 200 PPM CU, 15 PPM NI, 15000 PPM PB, 20 PPM V, 300 PPM ZN. AA ANALYSIS OF SAMPLES SHOWS 1.7 PPM AU, ALSO.

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 Jurassic
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Auld Lang Syne Group
    Rock description Auld Lang Syne Group

Nearby scientific data

(1) -118.09681, 40.90239
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike N 35 E-N 30 E
    Dip 60 SE; 70 NE
    Thickness 0.3M
  • General form TABULAR
    Strike N 35 E-N 30 E
    Dip 60 SE; 70 NE

Controls for ore emplacement

  • Shear Zone, Fractures; Dike Contact

Comments on the geologic information

  • THE INTRUSIVE BODY, NOT SHOWN ON THE COUNTY GEOLOGIC MAP, MAY EXTEND EAST 1000 FT OR MORE, MAY CONNECT WITH INTRUSIVE AT SAMPLE SITE 2627, PROBABLY A SMALL PLUG RATHER THAN A DIKE.

Economic information about the deposit and operations

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

Mining district

District name Mill City District; Central District

Land status

Ownership category BLM Administrative Area

Comments on the workings information

  • ADITS, SMALL STOPES ALONG VEIN

Reference information

Bibliographic references

  • Deposit

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

General comments

Subject category Comment text
Deposit WHITE QUARTZ VEIN ALONG SHEAR ZONE CONTAINS RED HEMATITE STAINING ON FRACTURES, PARK RED HEMATITE BANDING ON BOTH WALLS, HAS 0.5-1FT FAULT GOUGE ON WALLS. VEIN IS BRECCIATED AND CEMENTED WITH FE OXIDE SILICA. VEIN PINCHES AND SWELLS ALONG STRIKE AND DIP. THE UPPER (SOUTH) WORKINGS EXPOSE A DIORITE (TO EAST) CONTACT ZONE WITH VEIN QUARTZ ALONG THE CONTACT. VEIN-DIKE CONTACT HERE STRIKES N 40-45 E. DIKE IS A FINE-GRAINED GRANODIORITE COMPOSED OF BIOTITE (MODERATELY CHLORITIZED), QUARTZ, FELDSPAR, SOME FE OXIDE POINTS (AFTER PYRITE). INTRUSIVE BODY EXTENDS TO THE EAST AND IS CUT BY A QUARTZ-CALCITE VEIN IN WORKINGS THERE. THE VEIN IS HEMATITE-STAINED, CRUSHED QUARTZ VEIN WITH DOG-TOOTH SPAR ON WALLS; N 30 E STRIKE, 70 NE DIP TO VEIN.

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

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