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Sunset Mine

Past Producer in Placer 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. Ownership information
  12. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10237215
MRDS ID W024457
MAS/MILS ID 0060610684
Record type Site
Current site name Sunset Mine
Alternate or previous names Sun Set Chrome Mine, Sugar Pine Chrome Mine
Related records 10077061

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -120.78103, 39.10409 (WGS84)
Elevation 1116
Location accuracy 10(meters)

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 015 N 011 E 31 N2SENW California

Commodities

Commodity Importance
Chromium Critical Tertiary
Iron Tertiary

Materials information

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

Nearby scientific data

Main Entrance (1) -120.78103, 39.10409
ListMap

Economic information

Ore body information

  • Strike N55W
    Dip 90E
    Thickness 3M
    Length 150M
    Width 30M
    Depth to top 15M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 LENTICULAR
    Shape of Orebody #2 TABULAR
    Shape of Orebody #3 IRREGULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 CARBONITIZATION
    Strike And Dip N55W:90E
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 15
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 820521

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1881
Year of first production 1881

Ownership information

  • Type Owner
    Owner U.S. Forest Service - Tahoe National Forest
    Interest 100
    Home office California
    Year 1976
  • Type Operator
    Owner Green, T. C
    Home office California
    Year 1975
    Last year 1945

Comments on the production information

  • TOTAL PRODUCTION THRU WWZ WAS 400-500 TONS ORE RAM 54 PER C 03 WITH CR/FE=2.99,CITED FROM 700 INSUFFICENT DATA FOR MATRIX CALCULATIONS. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-MASSIVE 2 01.91, CR2O3 58.46, FEO 10.99, TOTAL FE 16.08, AL203 08.50, MGO CR/FE 3.20.MASSIVE ORE WITH UVAROVITE=S102 4.51, CR2O3 52.98, 55, TOTAL FE 17.69, AL203 9.45, MGO 14.09, CR/FE 2.64.

Reference information

Bibliographic references

  • Deposit

    RYNEARSON,CAL ST DIV MINES BULL 134,PT 3,CH 5, PP 221-223

  • Deposit

    BRADLEY,CALIF STATE MINING BUREAUBULL NO 76,PP 162-163

Reporter information

Type Date Name Affiliation Comment
Reporter 27-FEB-1984 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.