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Grizzley Flat

Occurrence in El Dorado county in California, United States with commodity Tungsten
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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. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10008589
MRDS ID D000900
Record type Site
Current site name Grizzley Flat
Alternate or previous names Candor, Pierce, Sciaroni

Geographic coordinates

Geographic coordinates: -120.56768, 38.66657 (WGS84)
Relative position 3 MILES NW OF GRIZZLY FLAT

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sly Park(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Cosumnes(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Federal lands

Eldorado 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 El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 010N;009N 013E;013E 32;05 California

Commodities

Commodity Importance
Tungsten Critical Tertiary

Materials information

Materials Type of material
Scheelite Ore
Epidote Gangue
Garnet Gangue
Quartz Gangue

Analytical data

Result 1-2% WO3

Nearby scientific data

(1) -120.56768, 38.66657
ListMap

Economic information

Ore body information

  • Width 9.14M

Comments on the geologic information

  • GEOL.DESC: ZONE IS ABOUT 1 MILE LONG, 600 FT. WIDE, IT CONSISTS OF LAYERS OF GARNET-EPIDOTE TACTITE INTER BEDDED WITH QUARTZ-MICA SCHIST, QUARTZITE AND GRANITE GNEISS.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Comments on the production information

  • NO PRODUCTION, BUT LAST OWNERS IN 1955 WERE CONCENTRATING SMALL AMT'S OF ORE IN A SMALL PILOT MILL AND STOCK PILING THE CONCENTRATES.

Comments on the workings information

  • OPEN CUTS AND ONE ADIT ON THE SOUTH PORTION OF THE DEPOSIT.

Reference information

Bibliographic references

  • Deposit

    CLARK, W.B. AND CARLSON, D.W., 1956; MINES AND MINERAL RESOURCES, EL DORADO COUNTY; CALIF. JOUR. MINES AND GEOLOGY, VOL. 52, NO. 4; DIV. OF MINES, P. 440.

  • Deposit

    LEMMON, D.M. AND TWETO, O.L., 1962; TUNGSTEN IN THE US; USGS MAP, MR-25.

  • Production

    CLARK AND CARLSON

General comments

Subject category Comment text
Deposit FEW QUARTZ VEINS ARE PRESENT, SCHEELITE HORIZONS RANGE FROM 5-30 FT. IN WIDTH AND SEVERAL HUNDRED FT. IN LENGTH

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1974 Elliott, James E. U.S. Geological Survey
Updater 01-MAR-1979 Fraticelli, L. A. (Albers, J.) 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.