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  3. Mineral Resource Data System (MRDS)

Pillikin Pilliken

Producer in El Dorado county in California, United States with commodity Chromium
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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. Economic information about the deposit and operations
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10029649
MRDS ID M007324
Record type Site
Current site name Pillikin Pilliken

Geographic coordinates

Point of reference Centroid
Geographic coordinates: -121.09069, 38.77539 (WGS84)
Relative position Original record had no geographic coordinates; these coordinates were derived from the PLSS description provided.

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 011N 008E 21,28 California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Nearby scientific data

Centroid (1) -121.09069, 38.77539
ListMap

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1853

Ownership information

  • Type Owner
    Owner American Trust Co.

Comments on the production information

  • A FEW POCKETS PRIOR TO 1894. WORKED DURING WWI; IDLE 1918--1936; WORKED 1936-39, 1940-42; 1944-45. UP TO 1945 THESE DEPOSITS HAD YIELDED A TOTAL OF 27,144 LONG TONS OF CHROMITE. LITTLE ORE PRODUCED 1941-53, SOME PRODUCTION 1954-55, BUT IDLE SINCE THAT TIME.

Comments on the workings information

  • OPEN PIT AND UNDERGROUND WORKINGS.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 52, NO. 4, PP. 387-393, 473

  • Deposit

    DOM BULL. 134, PT. 3, CHAP. 4, PP. 131-146, PL. 8

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 34, NO. 3, PL. II; ADD. REF.; PRESENT HOLDINGS INCLUDE ALSO THE BONANZA KING, CHROME GULCH, DONNELLY, NIELSON, AND STEELE MINES. MODERATE TONNAGES OF CHROME SHIPPED IN 1957 - U. S. BUREAU OF MINES MIN. YEARBOOK 1957, V. 3, P. 216

General comments

Subject category Comment text
Deposit WORKINGS ARE PROBABLY THOSE SHOWN AT THE ABOVE LOCATIONS ON USGS QUAD. PILOT HILL, CALIF. 1954. THERE ARE ELEVEN SEPARATE CHROMITE BEARING AREAS IN THIS DEPOSIT. BECAUSE OF THE IRREGULAR SHAPE AND ERRATIC DISTRIBUTION OF THE ORE BODIES, POTENTIAL RESERVES ARE UNKNOWN. MINE CONTAINS LARGEST KNOWN CHROMITE DEPOSITS IN THE SIERRA NEVADA.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-72 Gere, W. U.S. Geological Survey

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.