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Pioneer-Lilyama Mine

Past Producer in El Dorado county in California, United States with commodities Copper, 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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10211644
MAS/MILS ID 0060170132
Record type Site
Current site name Pioneer-Lilyama Mine
Alternate or previous names Lilyama Copper and Gold Mine., Little Emma., Volo., Lilyama

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -120.96603, 38.83519 (WGS84)
Elevation 293
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Coloma(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 011 N 009 E 03 NWN2 California

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary

Materials information

Materials Type of material
Bornite Unknown
Calcite Unknown
Chalcopyrite Unknown
Epidote Unknown
Garnet Unknown
Gold Unknown
Hedenbergite Unknown
Hematite Unknown
Hornblende Unknown
Magnetite Unknown
Pyrite Unknown
Quartz Unknown
Silver Unknown

Nearby scientific data

Main Entrance (1) Mesozoic gabbroic rocks, unit 2 (undivided)
ListMap

Economic information

Ore body information

  • Strike N00E
    Dip 00E
    Thickness 12M
    Length 366M
    Width 18M
    Depth to top 10M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 PIPELIKE
    Type of Orebody #2 BRECCIA FILL
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin CONT METASOMATIC
    Primary Ore Control FRACTURING
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 CARBONATE SILIC
    Strike And Dip N00E:00E
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1870
Year of first production 1944

Mining district

District name Mother Lode Belt

Mineral rights holdings

Type of mineral rights Patented

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Lilyama Copper-Gold Mining Co.
    Home office California
    Year 1978
  • Type Unknown
    Owner Morning Star Mining Corp.
    Home office California
    Year 1977

Reference information

Bibliographic references

  • Deposit

    AUBURY,L.E.,1902,THE CU RESOURCES OF CAL.,CAL. MIN.BUR.,BULL

  • Deposit

    23, P 174-182.

  • Deposit

    AUBURY,L.E.,1908,THE CU RES. OF CA.,CA. MIN. BUR. BULL. 50,

  • Deposit

    P.210-220.

  • Deposit

    AVERRILL, C.N., 1943,CURRENT NOTES ON THE ACTIVITY IN

  • Deposit

    STRATEGIC MINERALS, SACTO. FIELD DIST: CA.DIV. MINES REPT.

  • Deposit

    NO.37,P.71-76.

  • Deposit

    COX,M.W., WYANT,W.C.,AND HEYL, G.R.,1948, GEOL. OF THE

  • Deposit

    LILYAMA AND PIONEER MINES, EL DORADO CO., CA. CA DIV.OF

  • Deposit

    MINES BULL. 144, P.43-47.

  • Deposit

    BENSON,W.T., 1948, PRELIM. REPT. ON THE LILYAMA CU/AU MIN.

  • Deposit

    CO., EL DORADO CO.,CA.,P7.

  • Deposit

    ERIC,J.E., 1948, TABULATION OF CU DEPTS OF CA.,CA.DIV.OF

  • Deposit

    LOGAN, C. A., 1938, MINERAL RES. OF EL DORADO CO.; CA. DIV.

  • Deposit

    OF MINES REPT. 34, P. 206-280, 363-365.

  • Deposit

    MURDOCH, J., AND WEBB, R. W., 1948, MIN. OF CA.: CA. DIV. OF

  • Deposit

    MINES BULL. 136, 402 P.

  • Deposit

    THE COUNTIES OF EL DORADO, PLACER, SACTO., YUBA: CA. MIN.

  • Deposit

    BUR. REPORT 15, P. 271-308.

  • Deposit

    TURNER, M. D., 1951, EL DORADO: CA. DIV. MINES REPT. 47,

  • Deposit

    P. 319-321.

  • Deposit

    LOGAN, C. A., 1926, EL DORADO CO., CAL. MIN. BUR. REPT. 22,

  • Deposit

    P. 397-452.

  • Deposit

    CLARK, W. B., AND DENTON, W. C., 1956, MINES AND MIN. RES.

  • Deposit

    OF EL DORADO CO., CA.: CA. JOUR. MINES AND GEOL. P. 370-400.

  • Deposit

    WAR MINERAL EXAM., 1948, 2 P..

  • Deposit

    CALIFORNIA REGIONAL WATER QUALITY CONTROL BORAD, CENTRAL

  • Deposit

    VALLEY REGION, INACTIVE MINE DRINAGE IN THE SACRAMENTO

  • Deposit

    VALLEY, CALIFORNIA, STAFF REPORT, JULY 1992, P65.

Reporter information

Type Date Name Affiliation Comment
Reporter 23-MAY-1996 Wetzel, Nicholas U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.