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Sunset Mine

Past Producer in Placer 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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10043719
MRDS ID M100630
Record type Site
Current site name Sunset Mine
Alternate or previous names Sugar Pine Chrome Mine

Geographic coordinates

Geographic coordinates: -120.78103, 39.10406 (WGS84)
Elevation 1116
Relative position MINE APPROX. 21 MILES E. OF AUBURN (BY ROAD)

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Foresthill(quadrangle 1:24,000 scale)

Truckee(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

North Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Tahoe National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Placer

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 015N 031E 31 N2 OF SE OF NW California

Comments on the location information

  • MAIN WORKINGS ARE APPROX. 250 FT WEST OF FINNING RD. AND LIE SW OF A 4 ROAD INTERSECTION.

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore
Uvarovite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -120.78103, 39.10406
ListMap

Economic information

Ore body information

  • General form POD

Comments on the geologic information

  • DEPOSIT OCCURS IN A MASS OF ULTRAMAFIC ROCKS THAT HAS INTRUDED A SEQUENCE OF MARINE SEDIMENTS THOUGHT TO BE A PART OF THE PALEOZOIC CALAVERAS GROUP. THE EASTERN EDGE OF THE ULTRAMAFIC MASS IS COLLINEAR AND PROBABLY PART OF THE MELONES FAULT ZONE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Year of first production 1885
Year of last production 1945

Mining district

District name Forest Hill Divide Area

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Green, T. C.
    First year 1945

Comments on the workings information

  • WORKINGS CONSISTED OF A SERIES OF SHAFTS, SHORT DRIFTS AND NUMEROUS SHALLOW SURFACE WORKINGS. ALL WORKINGS ARE COMPLETELY FILLED WITH DEBRIS OR FLOODED (1975)

Reference information

Bibliographic references

  • Deposit

    RYNEARSON, G.A., 1953, CDMG BULL 134, PT. 3, CHAPT. 5, P. 221-223, 312.

  • Deposit

    STINSON, M.C., 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED.

  • Production

    CDMG PT. 3, CHAPT. 5, P. 202

General comments

Subject category Comment text
Deposit ORE BODIES WERE LOCALIZED WITHIN A ZONE 100 FT WIDE 500 FT LONG AND WERE PARALLEL TO THE LOCAL TREND OF THE SHEAR PLANES, WHICH HAD THE ABOVE STRIKE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1983 Oster, Karel L. (Albers, John P.) 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.