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Crystal

Past Producer in El Dorado county in California, United States with commodity Gold
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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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10101084
MRDS ID C007716
Record type Site
Current site name Crystal
Alternate or previous names El Dorado Crystal
Related records 10259623

Geographic coordinates

Geographic coordinates: -120.91185, 38.6349 (WGS84)
Elevation 348
Relative position 1/2 MI. S OF SHINGLE SPRINGS, 1/2 MI. DUE S OF FRENCHTOWN

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Shingle Springs(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)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 009N 010E 18 California

Comments on the location information

  • UTM ACC. NE 1/4 OF SE 1/4 SEC.

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • ORE UP TO $11 PER TON AU

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Calcite Gangue
Feldspar Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -120.91185, 38.6349
ListMap

Economic information

Ore body information

  • Strike N
    Dip 42 E
    Thickness 3.66M
    Depth to top 0M

Controls for ore emplacement

  • Deposition Of Vein Material Controlled By Cracks And Cavities Due To Disruption By Intrusion To W

Comments on the geologic information

  • IN WEST GOLD BELT, GABBRODIORITE LIES TO WEST, CRYSTALS OF QUARTZ IN CAVITIES

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Comments on the production information

  • NO PRODUCTION RECORD FOUND, ACTIVE PRIOR TO 1890 , EARLY 1890'S, 1937 - 1940

Comments on the workings information

  • DEVELOPED BY 250 FT. INCLINED SHAFT AND A 1,028 FT. ADIT DRIVEN N, 480 FT. INCLINED WINZE WITH LEVELS AT 200 , 326 AND 456 WAS SUNK FROM ADIT 328 FT. FROM PORTAL

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B., AND CARLSON, D. W., 1956 , MINES AND MINERAL RESOURCES OF EL DORADO CO., CALIF.: CALIF. JOUR. OF MINES AND GEOL., VOL. 52 , NO. 4 , PG. 413 - 414 , 495 AND PL. 10 .

  • Deposit

    LOGAN, C. A., 1938 , MIN. RESOURCES OF EL DORADO CO.: CALIF. JOUR. OF MINES AND GEOL., VOL. 34 , NO. 3 , PG. 228 - 229 , 260 AND PL. II.

General comments

Subject category Comment text
Deposit IRREGULAR VEIN, ORE SHOOT 8 - 24 FT. IN WIDTH AND UP TO 280 FT. LONG ON 326 FT. LEVEL

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1979 Mateik, R.; Albers, John P. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

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.