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Pilliken Mine

Past Producer in El Dorado county in California, United States with commodities Chromium, Iron
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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. Production statistics
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10236310
MRDS ID M100577
MAS/MILS ID 0060170006
Record type Site
Current site name Pilliken Mine
Alternate or previous names Flagstaff Hills/Pilliken, Pillikan
Related records 10043678

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -121.09273, 38.78209 (WGS84)
Elevation 287
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pilot Hill(quadrangle 1:24,000 scale)

Sacramento(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

North 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 008 E 28 NENWNE California

Commodities

Commodity Importance
Chromium Critical Primary
Iron Tertiary

Materials information

Materials Type of material
Chromite Unknown
Magnesite Unknown
Olivine Unknown
Serpentine Unknown
Uvarovite Unknown

Nearby scientific data

Main Entrance (1) -121.09273, 38.78209
ListMap

Economic information

Ore body information

  • Thickness 60M
    Length 3290M
    Width 730M
    Area 250HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SHEAR ZONE
    Shape of Orebody #2 IRREGULAR
    Type of Orebody #3 DISSEMINATED
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 CARBONITIZATION
    Strike And Dip N10W:
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 250
    Date of Last Modification 820902

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1853
Mining method Open Pit
Year of first production 1915

Mining district

District name Salmon Falls

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Located Claim

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Union Bank Of San Francisco (Owner Of Red Line...)
    Interest 100
    Home office California
    Year 1979
  • Type Operator
    Owner Western Chrome Products
    Interest 100
    Home office California
    Year 1979

Comments on the ownership information

  • OWNER: RED LINE TRANSFER CO. OPERATOR: WESTERN CHROME PRODUCTS.

Production statistics

  • Year 1916
    Description Lump Ore Produced 2170 Tonnesd @ Grade Unknown
  • Year 1917
    Description Lump Ore Produced 3452 Tonnes @ 43.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 3452mt 43wt-pct
  • Year 1918
    Description Lump Ore And Concentrates Produced 3682 Tonnes @ 50.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 3682mt 50wt-pct
  • Year 1936
    Description Lump Ore And Concentrates Produced 30 Tonnes @ Grade Unknown
  • Year 1937
    Description Lump Ore And Concentrates Produced 470 Tonnes @ 50.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 470mt 50wt-pct
  • Year 1938
    Description Lump Ore And Concentrates Produced 770 Tonnes @ 49.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 770mt 49wt-pct
  • Year 1939
    Description Lump Ore And Concentrates Produced 3085 Tonnes @ 45-48 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Chromium Chromium 3085mt 45wt-pct
  • Year 1940
    Description Lump Ore And Concentrates Produced 1800 Tonnes @ 42.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 1800mt 42wt-pct
  • Year 1941
    Description Lump Ore And Concentrates Produced 4489 Tonnes @ 42.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Chromium Chromium 4489mt 42wt-pct
  • Year 1942
    Description Lump Ore And Concentrates Produced 7173 Tonnes @ 41-43 Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 7173mt 42wt-pct
  • Year 1943
    Description Lump Ore Produced 276 Tonnes @ 43.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 276mt 43wt-pct
  • Year 1944
    Description Lump Ore Produced 165 Tonnes @ 44.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 165mt 44wt-pct
  • Year 1953
    Description Concentrates Produced 191 Tonnes @ 42.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 191mt 42wt-pct
  • Year 1953
    Description Lump Ore Produced 299 Tonnes @ 45.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 299mt 45wt-pct
  • Year 1954
    Description Concentrate Produced 146 Tonnes @ 45.10 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 146mt 45wt-pct
  • Year 1954
    Description Lump Ore Produced 219 Tonnes @ 45.10 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 219mt 45wt-pct
  • Year 1955
    Description Lump Ore Produced 28 Tonnes @ 44.50 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 28mt 45wt-pct
  • Year 1955
    Description Concentrates Produced 166 Tonnes @ 45.00 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 166mt 45wt-pct
  • Year 1957
    Description Lump Ore Produced Tonnes @ 42.80 Pct Cr203
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 43wt-pct

Workings at the site

  • Type of workings Surface
    Area 250HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .6
    Percent Waste Rock 75
    Avg. Overburden Thickness 0
    Primary Material Cover M-HARD ROCKS
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 6
    Max. Pit Slope (degrees) 45
    Capacity 300
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 10.68
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 1
    Year of Information 1984

Reference information

Bibliographic references

  • Deposit

    CATER,F.W.,JR.,ET AL., GEOLOGICAL INVESTIGATIONS OF CHROMITE

  • Deposit

    IN CALIFORNIA, CHAPTER 4, CHROMITE DEPOSITS OF EL

  • Deposit

    DORADO COUNTY, CALIFORNIA., CALIF. DIV. OF MINES BULL.

  • Deposit

    134, PART III, OCTOBER 1951.

  • Deposit

    CARLSON,D.W., PILLIKEN MINE. PRELIMINARY REPORT NO. 8, APRIL

  • Deposit

    1953, EL DORADO COUNTY.

  • Deposit

    CLARK,L.D., STRATIGRAPHY AND STRUCTURE OF PART OF THE

  • Deposit

    WESTERN METAMORPHIC BELT,CALIFORNIA,U.S.G.S. PROF.

  • Deposit

    PAPER 410, 1964.

  • Deposit

    LINDGREN,WALDMER,TURNER, U.S.G.S. GEOL.ATLAS,PLACERVILLE,

  • Deposit

    SACREMENTO,AND JACKSON FOLIO REPRINTS (NOS.3,5,AND 11),

  • Deposit

    P.4, 1984, REPRINTED 1914.

  • Deposit

    MCMILLAN,W.D., PRELIMINARY REPORT ON U.S. CHROME MINES,

  • Deposit

    PILLIKEN CHROME DISTRICT, EL DORADO COUNTY; US BUMINES

  • Deposit

    PRELIMINARY REPORT, 13P., AUGUST, 1941.

  • Deposit

    WELLS,F.G., CHROMITE DEPOSITS OF THE PILLIKEN AREA, EL

  • Deposit

    DORADO COUNTY, CALIFORNIA; U.S.G.S. BULL 922-0, 1940.

  • Deposit

    WETZEL,N.,NOKLEBERG,W., PLATE TECTONIC AND STRUCTURAL

  • Deposit

    RELATIONS FOR THE ORIGIN AND THE DEFORMATION OF THE

  • Deposit

    WESTERN METAMORPHIC BELT ALONG THE MARGIN OF THE

  • Deposit

    CENTRAL SIERRA NEVADA BATHOLITH, GEOL.SOC.OF AMER.

  • Deposit

    ABSTRACT, 72ND ANNUAL MEETING, VOL.8,NO.3,FEB.

  • Deposit

    1976.

  • Deposit

    WETZEL,N.,GALE.G., THE PILLIKEN CHORMITE DEPOSIT EL DORADO

  • Deposit

    COUNTY, CALIFORNIA, US BUMINES MAS DEPOSIT REPORT,

  • Deposit

    UNPUBLISHED, JUNE 1980.

General comments

Subject category Comment text
Deposit REAL ESTATE DEVELOPMENT IN AREA WILL PROBABLY PREVENT MINING DEPOSIT.

Reporter information

Type Date Name Affiliation Comment
Reporter 21-FEB-1995 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.