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Keystone Mines

Producer in Pershing county in Nevada, United States with commodities Silver, Lead, Zinc, Gold, Copper, 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. 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. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10042501
MRDS ID M060311
Record type Site
Current site name Keystone Mines
Alternate or previous names Nevada Keystone Mine, NBMG Sample Sites 2654, 2655, 2656, Old Central
Related records 10150126

Geographic coordinates

Geographic coordinates: -118.1182, 40.84156 (WGS84)
Elevation 1510

Site location context

Political divisions (FIPS codes)

Pershing(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cosgrave(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)

Geographic areas

Country State County
United States Nevada Pershing

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 034N 034E 01,12 Nevada

Comments on the location information

  • SW 1/4 SEC. 1; NW 1/4 SEC. 12 ; INFO FROM LAND.ST :(1972)

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary
Gold Secondary
Copper Secondary
Tungsten Critical Tertiary

Comments on the commodity information

  • SCHEELITE WAS FOUND IN DRILL CORE OF GRANODIORITE FOR 22 FT ALONG THE CORE FROM A DEPTH OF 135 FT DOWN.

Materials information

Materials Type of material
Pyrite Ore
Scheelite Ore
Sphalerite Ore
Stibnite Ore

Alteration

  • (Local) Sericitization, Silicification, Kaolinization, Pyritization

Analytical data

Result AVE. 32 OZ AG, 4.3% PB, 2.5% ZN PER TON. SAMPLE 2654 OF VEIN QUARTZ WITH SULFIDE CLOTS CONTAINS 1.5 % FE, 0.05 % MG, 0.2 % CA, 0.01 % TI, 100 PPM MN, 300-0 PPM AG, 3000 PPM AS, 100 PPM B, 30 PPM BA, 100 PPM CD, 2000 -PPM CU, 20 PPM LA, 1500 PPM PB, 3000 PPM SB, 20 PPM SN, 5000 P-PM ZN. SAMPLE 2655 OF VEIN QUARTZ WITH SULFIDES AND DOLOMITE V-EIN MATERIAL CONTAINS 3 % FE, 0.15 % MG, 0.2 % CA, 0.03 % TI, -200 PPM MN, 700 PPM AG, +10000 PPM AS, 1500 PPM B, 50 PPM BA, -+500 PPM CD, 500 PPM CU, 20000 PPM PB, 2000 PPM SB, 150 PPM SR-, 10 PPM V, +10000 PPM ZN, 20 PPM ZR. SAMPLE 2656, A DUMP SAMP-LE OF VEIN QUARTZ WITH SULFIDES, CONTAINS 0.3 % FE, 0.05 % MG,- 0.003 % TI, 15 PPM MN, 500 PPM AG, 2000 PPM AS, 500 PPM B, 20-PPM BA, 10 PPM BI, 100 PPM CD,-500 PPM CU, 30 PPM LA, 10000 PP-M PB, 700 PPM SB, 5000 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 Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Metamorphic Rock > Hornfels

Nearby scientific data

(1) -118.1182, 40.84156
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Gently Dipping Shear Zones

Ore body information

  • Strike N15E
    Dip 30S
    Width 1.83M

Controls for ore emplacement

  • Shear Zones

Comments on the geologic information

  • ORE ZONE VARIES FROM 2 TO 6 FT. IN WIDTH

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1872

Mining district

District name Mill City District

Land status

Ownership category Private

Comments on the workings information

  • TWO SHAFTS, OLDER ONE TO THE EAST HAS HEADFRAME, HOIST HOUSE. LARGE OPEN CUTS ON VEIN SYSTEM; NEWER SHAFT TO SW; C-UTS AND PROSPECT SHAFTS EXTEND TO THE NE.

Comments on development

  • NO DEVELOPMENT UNTIL 1937 WHEN ACQUIRED BY NEVADA KEYSTONE CO. KEYSTONE MINE WAS WORKED INTERMITTENTLY TO 1966. EVIDENCE OF RECENT DIAMOND DRILLING (1985). THE KEYSTONE MINE MUST HAVE BEEN WORKED IN THE 1870-1880'S, EVIDENCE -OF OLD BUILDINGS CAN BE SEEN IN THE WASH EAST OF THE OLD SHAFT-. REMAINS OF AN OLD HORSE WHIM CAN BE SEEN AT THE NORTHEASTERN- WORKINGS.

Reference information

Bibliographic references

  • Deposit

    LEMMON, D.M., 1977, IN GEOLOGY AND MINERAL DEPOSITS OF PERSHING COUNTY, NEVADA: NBMG BULL. 89

  • Deposit

    KLEPPER, M.R., 1943, UNPUBLISHED REPORT

  • Deposit

    TINGLEY, J. V., 1985, NBMG FIELD EXAMINATION REPORT,4/19/1985.

  • Deposit

    STAGER, H. K., IN PREPARATION, TUNGSTEN DEPOSITS OF NEVADA, NBMG BULL.

General comments

Subject category Comment text
Deposit ORE ZONE VARIES FROM 2 TO 6 FT IN WIDTH. THE MINES ARE IN GRANODIORITE THAT CUTS SHALE OF TRIASSIC AGE. WESTERN (NEW) SHAFT SUNK ON N-S TRENDING WHITE QUARTZ VEIN IN SHALE; WALLROCK IS MODERATELY SILICIFIED, LACED WIT-H QUARTZ-SULFIDE VEINLETS. AT THE OLD SHAFT TO THE NE, A N30E,-40 SE QUARTZ VEIN OCCUPIES A SHEAR ZONE IN KAOLINIZED GRANODIO-RITE. VEIN IS 1-2 FT WIDE, IRON AND MANGANESE OXIDE-STAINED. V-EIN CONTAINS GALENA, SPHALERITE, TETRAHEDRITE IN WHITE QUARTZ -GANGUE. PARALLEL QUARTZ VEINS CUT BOTH GRANODIORITE AND SHALE;-GRANODIORITE IS GENERALLY KAOLINIZED AND LACED WITH QUARTZ VEI-NLETS. SOME QUARTZ ON THE DUMP DISPLAYS PALE GREEN STAINING. S-HEAR ZONE IS 200-300 FT WIDE AND BOTH OLD AND NEW SHAFTS ARE W-ITHIN IT. VEIN SYSTEM SEEMS TO BE STRONGER WHERE IT CUTS GRANO-DIORITE. TO THE NE AT SAMPLE SITE 2656, OLD PITS, SHAFTS, CUTS- EXPOSE A SERIES OF N60-70W NE-DIPPING QUARTZ VEINS WHICH CUT -HORNFELS AND SHALE. THE VEINS ARE 4-15 FT THICK, ARE BRECCIATE-D, AND ARE IRON-OXIDE
Deposit STAINED ON OUTCROP. VEIN MATERIAL ON SOM-E OF THE DUMPS CONTAINS PODS OF MASSIVE PYRITE. THE HORNFELS W-ALLROCKS ARE BLEACHED, KAOLINIZED AND CONTAIN DISSEMINATED PYR-ITE. VEIN MATERIAL CONTAINS SPHALERITE, GALENA, SOME TETRAHEDR-ITE AND STIBNITE; MODEL NAME COULD ALSO BE: POLYMETALLIC VEINS.
Deposit LOCATED IN 1872, NO DEVELOPMENT UNTIL 1937 WHEN ACQUIRED BY NEVADA KEYSTONE CO. MINE WORKINGS ARE IN AN AREA OF SHALES AND LIMESTONES WHICH HAVE BEEN INTRUDED BY GRANODIORITE DIKE. THE KEYSTONE MINES ARE LOCATED IN THE GRANODIORITE WHICH CUTS THE SHALES OF TRIASSIC AGE. KEYSTONE MINE WAS WORKED INTERMITTENTLY TO 1966. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1973 Johnson, Maureen G. Nevada Bureau of Mines and Geology
Updater 01-AUG-1985 La Pointe, D.D. (Tingley, J.V.) Nevada Bureau of Mines and Geology
Updater 01-NOV-1980 Royse, Sue E. 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.

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.