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Briar Cliff

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. Economic information about the deposit and operations
  12. Production statistics
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10006866
MRDS ID C007632
Record type Site
Current site name Briar Cliff
Alternate or previous names Baldwin, Last Chance
Related records 10283989

Geographic coordinates

Geographic coordinates: -120.83408, 38.56434 (WGS84)
Elevation 351
Relative position 1 MI SE OF NASHVILLE ON E BIG CANYON CREEK

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Fiddletown(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

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 008N 010E 12,01 California

Comments on the location information

  • UTM ACC W EDGE OF 12

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • BEST ORE FROM HANGING WALL

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate

Economic information

Ore body information

  • Strike N 10 E
    Dip 66 SE
    Thickness 4.57M
    Depth to top 0M

Comments on the geologic information

  • VEIN DIPS 60 TO 72 SE AMPHIBOLITE HANGING WALL SLATE FOOTWALL

Economic information about the deposit and operations

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

Production statistics

  • Year 1935
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 3g/mt
  • Year 1936
    Period - 1936
    Accuracy Estimate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 3g/mt

Comments on the production information

  • ACTIVE 1890'S, 1909 , 1914 , 1932 - 1936 , 1940 - 1941

Comments on the workings information

  • DEVELOPED BY 200 FT 70 DEG. INCLINED SHAFT, A NE DRIFT ADIT TO SHAFT AND 500 FT WINZE TWO LEVELS AT 100 AND 170 FT STOPED FROM 100 FT LEVEL TO SURFACE

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. 411 - 412 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. 226 AND 259 AND PL 2 .

  • Deposit

    TUCKER, W. B., 1919 , EL DORADO COUNTY: CALIF. MIN. BUR. REPT., 15TH REPT. STATE MIN., P. 280 .

  • Production

    CLARK ( 1956 ) LOGAN 1938

General comments

Subject category Comment text
Deposit VEIN 15 FT AVERAGE THICKNESS
Deposit LAST CHANCE CLAIM ON N AND BALDWIN ON S ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1979 Mateik, R.; Albers, John P. U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan 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.