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  3. Mineral Resource Data System (MRDS)

Sliger

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. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Production statistics
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10006860
MRDS ID C007617
Record type Site
Current site name Sliger

Geographic coordinates

Geographic coordinates: -120.9327, 38.94128 (WGS84)
Elevation 579

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Greenwood(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(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

USBR(Federal land areas administered by USBR)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 013N 009E 25,36 California

Comments on the location information

  • UTM ACC. SW 1/4

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • 40 PERCENT FREE AU. ORE TENOR NEARLY UNCHANGED FROM 300 FT. LEVEL TO 2000 FT. LEVEL.

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Ankerite Gangue
Quartz Gangue

Analytical data

Result AU AS HIGH AS 925 IN FINENESS

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Associated
    Rock type Metamorphic Rock > Amphibolite
  • Host or associated Associated
    Rock type Metamorphic Rock > Serpentinite
    Rock unit name Mariposa Formation
    Rock description Mariposa Formation
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Mariposa Formation
    Rock description Mariposa Formation

Nearby scientific data

(1) -120.9327, 38.94128
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Fault Zone

Ore body information

  • Strike N
    Dip 63 E
    Depth to top 0M

Comments on the geologic information

  • SILICEOUS SLATE W. NUMEROUS QTZ. STRINGERS IN FAULT ZONE BETWEEN MARIPOSA SLATE FOOTWALL AND SERPENTINE BAND HANGING WALL. AMPHIBOLITE COUNTRY ROCK. ORE ZONE 30 FT. WIDE, LENSOID ORE SHOOTS W/O DEFINITE WALLS, BUT MERGING INTO LOWER GRADE ROCK. BELIEVED THAT AU BEARING SOLUTIIONS ROSE ALONG FAVORABLE SLATE BANDS TO THE FAULT WHERE THEY SPREAD TO FORM ORE SHOOTS. FINE DISSEMINATED PYRITE.

Economic information about the deposit and operations

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

Production statistics

  • Year 1937
    Period 1934 - 1937
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 7g/mt

Comments on the production information

  • FROM 1932 - 1942 $2,625,000 WAS RECOVERED. A SMALL AMOUNT OF AU WAS PRODUCED IN 1864.

Workings at the site

  • Type of workings Surface/Underground
    Area 19.021HA

Comments on the workings information

  • 2000 FT. INCLINED SHAFT AND OPEN STOPES.

Reference information

Comments on the other database information

  • RECORD NUMBER 348 IS A POTENTIAL DUPLICATE OF THIS RECORD

Bibliographic references

  • Deposit

    CLARK, W. B., & CARLSON, D. W., 1956 , MINES AND MINERAL RESOURCES OF EL DORADO CO., CALIF.: CALIF. JOUR. MINES AND GEOL. VOL. 52 , NO. 4 , P. 425 , 426 , 532 , PL. 10 .

  • Deposit

    LOGAN, C. A., 1938 , MIN. RESOURCES OF EL DORADO CO.: CALIF. JOUR. OF MINES AND GEOL., VOL. 34 , NO. 3 , PG. 250 .

  • Production

    CLARK AND CARLSON, 1956

General comments

Subject category Comment text
Deposit VEIN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Hayden, F. (Albers, J.) 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.