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Beat Claim

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. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10043541
MRDS ID M100323
Record type Site
Current site name Beat Claim

Geographic coordinates

Geographic coordinates: -120.77881, 39.19933 (WGS84)
Elevation 1207

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Dutch Flat(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 011E 06 NW OF NW OF NE California

Comments on the location information

  • LOCATION OF CLAIM UNCERTAIN. STINSON ESTIMATED THE LOCATION DURING A FIELD CHECK IN 1975

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Analytical data

Result ORE AVERAGED 55% CR2O3

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -120.77881, 39.19933
ListMap

Economic information

Ore body information

  • Thickness 1.22M
    Length 9.14M
    Width 1.83M

Comments on the geologic information

  • DEPOSIT OCCURS IN THE EASTERNMOST OF 3 SUB PARALLEL BELTS OF ULTRAMA FIC ROCKS THAT TREND NORTH WARD ACROSS PLACER CO.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1917
Discoverer Mr. Allen
Year of first production 1918
Year of last production 1945

Mining district

District name Dutch Flat Area

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Sullivan, D. J.
    First year 1945
  • Type Owner
    Owner U.S. Government

Production statistics

  • Year 1945
    Period 1918-1945
    Material ORE CR
    Accuracy Estimate
    Description Cp_Grade: ^Avg. 55% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 55wt-pct

Comments on the workings information

  • WORKINGS CONSISTED (1940'S) OF A SYSTEM OF TUNNELS DRIVEN A SHORT DISTANCE BELOW THE PRE MINING SURFACE. MINE WORKINGS COULD NOT BE FOUND DURING A 1975 VISIT.

Reference information

Bibliographic references

  • Deposit

    RYNEARSON, G.H., 1953, CDMG BULL 134, PT. 3, CHAPT. 5, P. 205, 306.

  • Deposit

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

  • Production

    CDMG MINERAL PROPERTY REPORT, UNPUBLISHED

General comments

Subject category Comment text
Deposit THE DEPOSIT APPEARS TO BE A WEATHERED AND ERODED SLIDE BLOCK AND OCCURS AT AND NEAR THE SURFACE. THE LARGEST ORE BODY HAD THE ABOVE DIMENSIONS.

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.