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Hapgood Silver Mine and Yellow Dog Prospects

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

Geologic information

Identification information

Deposit ID 10044991
MRDS ID M232641
Record type Site
Current site name Hapgood Silver Mine and Yellow Dog Prospects
Alternate or previous names NBMG Sample Site 2952

Geographic coordinates

Geographic coordinates: -118.57183, 41.55682 (WGS84)
Elevation 1341
Relative position 30 MILES SOUTH OF DENIO

Site location context

Political divisions (FIPS codes)

Humboldt(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Dyke Canyon(quadrangle 1:24,000 scale)

Denio(quadrangle 1:100,000 scale)

Vya(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Quinn(hydrologic unit)

Black Rock Desert(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 042N;043N 030E;030E 01;36 NE OF NE OF NE (01); SE (36) Nevada

Comments on the location information

  • ACCESSIBLE BY GOOD IMPROVED ROAD. UTM IS FOR SAMPLE SITE 2952 AT HAPGOOD MINE. YELLOW DOG PROSPECTS ARE SCATTERED -NORTH AND WEST OF THIS SITE.

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Secondary
Lead Secondary
Zinc Critical Secondary
Antimony Critical Tertiary
Arsenic Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Hematite Gangue
Limonite Gangue

Alteration

  • (Local) Kaolinization, Mn-Staining

Analytical data

Result GOLD, LESS THAN .003 TO .846 OZ/TON
Result SILVER, .03 TO 20.42 OZ/TONSAMPLE 2952 OF QUARTZ VEIN IN ADIT AND DUMP CONTAINS7 % FE, 0.2 % MG, 0.07 % CA, 0.15 % TI, 500 PPM MN, 5000 PPM A-G, +10000 PPM AS, 7.5 PPM AU (AA ANALYSIS), 50 PPM B, 200 PPM -BA, 200 PPM CD, 5 PPM CO, 50 PPM CR, 3000 PPM CU, 20 PPM MO, 7- PPM NI, +20000 PPM PB, 5000 PPM SB, 10 PPM SC, 50 PPM SN, 100- PPM V, 2000 PPM ZN.

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 Volcanic Rock (Aphanitic)
    Rock unit name Happy Creek Volcanics
    Rock description Happy Creek Volcanics
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Happy Creek Volcanics
    Rock description Happy Creek Volcanics

Nearby scientific data

(1) -118.57183, 41.55682
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Tight Se-Plunging Anticline

Ore body information

  • General form TABULAR
    Strike SW
    Dip STEEP
    Thickness 0.91M

Controls for ore emplacement

  • Shear Zones, Bedding Planes; Some Brecciation

Comments on the geologic information

  • QUARTZ-CALCITE VEINS FROM ONE TO A FEW FEET THICK. TWO DISTINCT VEIN SYSTEMS PRESENT. ONE TRENDS N50-60W, EMPLACED ALONG SHEAR ZONES PARALLEL TO MAIN AXIS OF REGIONAL FOLDING. THE OTHER IS AT RIGHT ANGLES TO THE FIRST, TRENDING N15-20E, PARALLEL TO BEDDING IN THE VOLCANIC ROCKS. AREA MINED WAS ALONG AN INTERSECTION OF THE TWO VEIN SYSTEMS. GOLD VALUES WERE OBTAINED FROM BOTH VEIN SYSTEMS, BUT SILVER APPEARS TO BE RESTRICTED TO THE NORTHEAST-TRENDING VEINS. GRADE OF ORE DECREASES WITH DEPTH.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Varyville District; Florence District

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner
    Owner Jack Doyle, Robinson And Associates
    Home office Aurora, Co
    First year 1973

Comments on the workings information

  • RECENT DOZER WORK IN THE VICINITY OF A LARGE OLDER ADIT THAT WAS THE MAIN WORKINGS. DRILLING AND ROAD-BUILDING DON-E WITHIN THE LAST 4 YEARS (1984)

Comments on development

  • RECENTLY DRILLED AND RESTAKED BY ROBINSON AND ASSOCIATES OF AURORA, COLORADO (1984)

Reference information

Bibliographic references

  • Deposit

    TINGLEY, J. V., 1973, UNPUBLISHED REPORT ON FILE AT N.B.M.G.

  • Deposit

    WILLDEN, R., 1964, NBMG BULL 59.

  • Deposit

    QUADE, JACK, 1984, NBMG FIELD EXAMINATION, 9-27-84, AND SAMPLE ANALYSIS

General comments

Subject category Comment text
Deposit THE OLD SW-BEARING ADIT WAS DRIVEN ON A SHEAR WITHIN THE META-ANDESITE WHICH IS PARTLY FILLED WITH OXIDIZED AND BR-ECCIATED QUARTZ VEIN MATERIAL. THE MINERALIZATION EXTENDS INTO- THE METASEDIMENTS ALONG THE MARGIN OF THE VEIN, AND INCLUDES -COPPER SULFIDES AND OXIDES AS WELL AS POSSIBLE AG-PB SULFIDES.- DRILL CORE HAS BEEN STORED IN A TRAILER ON THE SITE AND IS PR-ESUMED TO HAVE COME FROM THE LOCAL DRILL SITES.; MODEL NAME COULD ALSO BE: KUROKO MASSIVE SULFIDE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1981 La Pointe, D. D. Nevada Bureau of Mines and Geology
Updater 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.