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Keystone Mine

Past Producer in Clark county in Nevada, United States with commodities Gold, Copper, Silver
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Geologic information

Identification information

Deposit ID 10037224
MRDS ID M031116
Record type Site
Current site name Keystone Mine
Related records 10221928, 10310512

Geographic coordinates

Geographic coordinates: -115.52278, 35.83639 (WGS84)
Elevation 1463
Relative position 5 MILES DUE WEST FROM GOODSPRINGS, 12 MILES BY ROAD
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Geographic areas

Country State County
United States Nevada Clark

Public Land Survey System information

Meridian Township Range Section Fraction State
024S 058E 19 Nevada

Commodities

Commodity Importance
Gold Primary
Copper Primary
Silver Secondary

Materials information

Materials Type of material
Chrysocolla Ore
Copper Ore
Gold Ore
Limonite Ore

Analytical data

Result FINENESS OF THE GOLD 0.920 TO 0.930, UNCOMMONLY PURE

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Late Devonian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite

Nearby scientific data

(1) -115.52278, 35.83639
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Geologic structures

Type Description Terms
Regional Large Scale Overthrusts
Local Broad Anticline, Keystone Thrust, Small Underground Faults

Ore body information

  • Strike N
    Dip 30 W

Controls for ore emplacement

  • Contact Of Porphyry With Dolomite

Comments on the geologic information

  • ORE IS ALONG PORPHYRY/DOLOMITE CONTACT, IN VEINS IN PORPHYRY AND IN THE DOLOMITE AND ALONG FAULTS. GOLD CHEIFLY ASSOCIATED WITH LIMONITE STAINED GREENISH CLAY AND IN THE DARK CHERT.

Economic information

Economic information about the deposit and operations

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

Mining district

District name Goodsprings

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Nevada-Keystone Mining Co.
    First year 1906

Production statistics

  • Year 1947
    Period 1902 - 1947
    Material AU
    Accuracy Accurate
    Description Cp_Grade: ^.073 Oz/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 2g/mt

Comments on the production information

  • PRODUCTION PRIOR TO 1902 EST AT $380,000. BETWEEN 1931 - 1941 PRODUCTION INCLUDES ORE FROM BAREFOOT MINE. ORE SHOOTS MOST PRODUCTIVE WHERE VEIN WAS FLATTER THAN AVERAGE.

Workings at the site

  • Type of workings Underground
    Length 167.64M
    Overall depth 164.59M

Comments on the workings information

  • SOME OF THE SHOOTS ON THE UPPER CONTACT HAVE NOT BEEN EXPLORED BELOW THE 300 FOOT LEVEL.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M031116

Comments on the other database information

  • $600,000

Bibliographic references

  • Deposit

    HEWETT, 1931 , GEOLOGY AND ORE DEPOSITS OF GOODSPRINGS QUAD, USGS PROF. PAPER 162 , P. 105 - 107 .

  • Deposit

    LONGWELL, C. R., PAMPEYAN, E. H., BOWYER, B., ROBERTS, R. J., 1965 , GEOLOGY AND MINERAL DEPOSITS OF CLARK CO. NEV. BUREAU OF MINES, BULL. 62 , P. 191 .

  • Deposit

    NBMG, 1994, MI-1993

  • Production

    NBMG MI-1993

General comments

Subject category Comment text
Deposit ALSO INCLUDES BAREFOOT MINE AS PART OF THE KEYSTONE GROUP ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1979 Harner, Joy L. (Roberts, Ralph J.) U.S. Geological Survey
Updater 01-SEP-1994 Li, Zhiping (Moyer, Lorre A.) U.S. Geological Survey