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  3. Mineral Resource Data System (MRDS)

Johnson Ranch

Occurrence in Amador county in California, United States with commodities Copper, Gold, Silver
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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. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Land status
  12. Ownership information
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10028078
MRDS ID M004876
Record type Site
Current site name Johnson Ranch
Related records 10211257

Geographic coordinates

Geographic coordinates: -120.83658, 38.33768 (WGS84)
Relative position 5 MILES SW OF JACKSON ON STONY CREEK

Site location context

Political divisions (FIPS codes)

Amador(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Jackson(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Mokelumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Amador

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 006N 010E 25,35,36 California

Commodities

Commodity Importance
Copper Primary
Gold Primary
Silver Primary

Analytical data

Result 5-6 FT. VEIN: 2.6% CU, $3.75/TON AU, LITTLE AG. 12 FT. VEIN: 10% CU, $24/TON AU AND $4/TON AG.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -120.83658, 38.33768
ListMap

Economic information

Ore body information

  • Strike NW
    Dip NE
    Thickness 3.66M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Frank Boscovich
    First year 1953

Workings at the site

  • Type of workings Underground
    Length 91.44M
    Overall depth 64.01M

Comments on the workings information

  • TWO SHAFTS, ONE IS 90 FT. DEEP WITH A VEIN 5-6 FT. WIDE, OTHER SHAFT IS 210 FT. DEEP WITH A 12 FT. WIDE VEIN AT THE BOTTOM.

Reference information

Bibliographic references

  • Deposit

    AUBURY, L.E., 1908 , COPPER RESOURCES OF CALIFORNIA BULL. 50 ; CALIF. MIN. BUR., P. 227

  • Deposit

    TUCKER, W.B., 1914 , AMADOR COUNTY; 14TH REPT. STATE MINERALOGIST; CALIF. MIN. BUR., P. 13

General comments

Subject category Comment text
Deposit JOHNSON PROPERTY IS IN 25, 35, 36 (BULL 50)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Gere, W. U.S. Geological Survey
Updater 01-JUN-1978 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.