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Boss Mine

Producer in Esmeralda county in Nevada, United States with commodities Gold, Silver
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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. Reserves and resources
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10046659
MRDS ID M241852
Record type Site
Current site name Boss Mine
Alternate or previous names Black Rock Prospect, NBMG Sample Site 461, Gs Claims, Br Claims

Geographic coordinates

Geographic coordinates: -117.63315, 38.07466 (WGS84)
Elevation 1494
Relative position NE OF COALDALE JUNCTION, N. OF HIGHWAY 95

Site location context

Political divisions (FIPS codes)

Esmeralda(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Devils Gate(quadrangle 1:24,000 scale)

Tonopah(quadrangle 1:100,000 scale)

Tonopah(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Southern Big Smoky Valley(hydrologic unit)

Central Nevada Desert Basins(hydrologic accounting unit)

Central Nevada Desert Basins(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 Esmeralda

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 003N 039E 31 Nevada

Comments on the location information

  • MINE NORTH OF HIGHWAY 95; DISCOVERY OUTCROP-BLACK ROCK PROSPECT IS JUST SOUTH OF HIGHWAY. UTM IS TO MINE AREA. ; INFO FROM LAND.ST :(1972)

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Barite Gangue
Quartz Gangue

Alteration

  • (Local) Silicification

Analytical data

Result SAMLE 461 OF QUARTZ VEIN MATERIAL CONTAINS 15 FE, 0.05% MG, 0.1% CA, 0.03% TI, 200 PPM MN, 20 PPM AG, 200 PPM AS, 30 PPM B, 700 PPM BA, 1 PPM BE, 50 PPM CR, 50 PPM CU, 7 PPM NI, 20 PPM PB, 5 PPM SC, 500 PPM SR, 150 PPM V, 15 PPM Y, 15 PPM ZR.

Mineral occurrence model information

Model code 150
USGS model code 25c
Deposit model name Epithermal vein, Comstock
Mark3 model number 16

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Mudstone
    Rock unit name Palmetto
    Rock description Palmetto
    Stratigraphic age (youngest) Late Ordovician

Nearby scientific data

(1) -117.63315, 38.07466
ListMap

Economic information

Ore body information

  • Strike VEIN N60W - N70E
    Dip 50-60 N

Controls for ore emplacement

  • Fault Zone?

Comments on the geologic information

  • A REPLACEMENT TEXTURE OF QUARTZ AFTER LAMENAR CALCITE IS QUITE COMMON FE OXIDE STAIN OF VEIN COMMON. WALL ROCK IS CUT BYQUARTZ VEINLETS COMMONLY CONTAINING CHUNKS OF WALL ROCK FROM HYDROTHERMAL BRECCIATION. BARITE ROSES OCCUR IN SOME VUGS.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant Yes

Mining district

District name Gilbert District (Closest)

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner-Operator
    Owner Falcon Exploration Co.
    First year 1988

Reserves and resources

  • Type In-situ
    Estimate year 1987
    Total resources 226000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.976 g/mt Gold Major 1987

Comments on the workings information

  • SURFACE - OPEN PIT ; OLDER WORKINGS CONSIST OF 5-6 M SHAFT AND PITS

Comments on development

  • SEVERAL ROTARY DRILL HOLES ARE ON LOCATION IN 1982. MINING BEGAN A FEW YEARS LATER. MULTIPLE BENCH; CONSTRUCTION.

Reference information

Bibliographic references

  • Deposit

    GARSIDE, L.J., 1982, FIELD EXAMINATION, NBMG, JULY 14, 82.

  • Deposit

    BONHAM, H.F., 1986, NBMG MAP 91.

  • Deposit

    BONHAM, H.F., 1988, IN NBMG MI-1987.

  • Deposit

    NBMG BULL 78, 1972, PL. 1.

  • Deposit

    STAFF, 1988, DIRECTORY OF NEVADA MINE OPERATIONS ACTIVE DURING CALENDAR YEAR 1987: NEVADA DIVISION OF MINE INSPECTION, 84 P.

  • Reserve-Resource

    BONHAM, 1988.

General comments

Subject category Comment text
Deposit ENTIRE OUTCROP AT PROPERTY IS 40 METERS DIA. AND CONSISTS OF BLACK CHERTAND ARGILLITE, CUT BY STOCKWORK OF QUARTZ, VEIN, BRECCIA FILLING AND VEINLETS. VEINS CONTAIN SUGARY QUARTZ WITH SMALL DRUSY OPENINGS. REPLACEMENT TEXTURE OF QUARTZ AFTER LAMELLAR CALCITE IS QUITE COMMON, AS IS A CRUSTIFORM BILATERALLY SYMMETRICAL BANDING ACROSS THE VEINS. VEIN MATERIAL IS COMMONLY IRON-STAINED. IN BETWEEN VEINS, HOST ROCK IS CUT BY 3 MM- ICM VEINLETS OF QUARTZ. SOME BRECCIA ZONES ADJACENT TO VEINS WITH OPEN-SPACE TEXTURE MAY BE FAULT BRECCIAS. BARIET OCCURS AS SMALL ROSETTES IN CAVITIES IN SOME SAMPLES.
Deposit THIS RECORD HAS BEEN REVISED TO INCLUDE INFORMATION FROM RECORD NUMBER W700405, WHICH HAS BEEN DELETED.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1988 Paidkovich, Matthew E. U.S. Geological Survey
Updater 01-OCT-1988 La Pointe, D.D. (Tingley, J.V.) Nevada Bureau of Mines and Geology
Updater 01-SEP-1990 Maningas, M. (Marcus, S.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

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.