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Malachite Mine

Past Producer in Lyon county in Nevada, United States with commodities Copper, Gold, Silver, Gypsum-Anhydrite

Geologic information

Identification information

Deposit ID 10037695
MRDS ID M035868
Record type Site
Current site name Malachite Mine
Alternate or previous names Yerington - Malachite Copper Company

Geographic coordinates

Geographic coordinates: -119.22154, 38.94491 (WGS84)
Elevation 1615
Relative position EAST FLANK SINGATSE RANGE, 1.5 MILES W - SW OF MASON, NEV.
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Geographic areas

Country State County
United States Nevada Lyon

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 013N 025E 31 Nevada

Comments on the location information

  • JOINS MASON VALLEY MINE ON THE SOUTH

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary
Gypsum-Anhydrite Secondary

Comments on the commodity information

  • CRUDE AVE. GRADE OF ORE 6.2 PERCENT CU

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Cuprite Ore
Malachite Ore

Analytical data

Result OIL FLOTATION TEST PERFORMED NOV. 2 , 1915 BY CALAVARES COPPER CO. YIELDED FOLLOWING RESULTS: HEADINGS, 4713 , 5.02 % CU
Result CONCTS. 1ST 365, 17.68 % CU
Result CONSTS. 2ND, 80G, 9.68 % CU
Result TAILINGS, 355G, 2.74 % CU

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Yerington Batholith
    Rock description Yerington Batholith
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Triassic

Nearby scientific data

(1) -119.22154, 38.94491

Geologic structures

Type of structure Regional
Structure description Yerington Batholith

Ore body information

  • General form IRREGULAR
    Width 60.96M

Controls for ore emplacement

  • Fissured Shear Zone

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both metallic and non-metallic
Significant No

Mining district

District name Yerington

Land status

Ownership category Private

Comments on the production information

  • PRODUCTION ESTIMATED AT 15 TO 25 TONS ORE PER DAY IN 1912 ; PROD. CREDITED TO MASON VALLEY MINES CO.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 45.72M

Comments on the workings information

  • ADIT DRIVEN 550 FT ON THE MALACHITE CLAIM 3 COMP. SHAFT ON THE PLUMBUM, NUMEROUS SURFACE CUTS AND PITS WORKING CONNECT WITH 300 FT LEVEL MASON VALLEY MINE

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M035868

Bibliographic references

  • Deposit

    KNOPF, A., 1918 , GEOLOGY AND ORE DEPOSITS OF THE YERINGTON DISTRICT, NEV., USGS PROF. PAPER 114 .

  • Deposit

    MOORE, J. G., 1969 , GEOLOGY AND MINERAL DEPOSITS OF LYON, DOUGLAS, AND ORMSBY CO., NEV., NEV. BUREAU OF MINES, BULL. 75 .

  • Deposit

    EINAND, M. T., 1977 , PETROGENISIS OF THE COPPER - BEARING SKARN AT THE MASON VALLEY MINE, YERINGTON DIST. NEV., ECON. GEOL. VOL. 72 , NO. 5 .

  • Deposit

    1907 RECON MINING AND SCIENTIFIC PRESS

  • Deposit

    1910 RECON RANSOME, F. L., MINING AND SCI. PRESS

  • Deposit

    1918 GEOLMAP KNOPF, A., PROF. PAPER NO. 114

  • Deposit

    1969 RECON NEV. BUREAU OF MINES, BULL. 75

  • Production

    F (2)

General comments

Subject category Comment text
Deposit CONTACT METASOMATIC AUREOLE DEPOSIT PARALLEL IN CHARACTER TO THE MASON VALLEY DEPOSIT - PROBABLY EXTENSION OF. REFER TO RECORD NO. M035865
Deposit THE PROPERTY (TOTALING 192.6 ACRES) IS COMPRISED OF THE MALACHITE; M. EXT. M. NO.S 1 , 2 , 3 ; MONTGOMERY; JANUARY; PLUMBUM; KNOW U DONT; LIME RIDGE CLAIMS. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1979 Fiebelkorn, J. B. (Stewart, J. H.) U.S. Geological Survey