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  3. Mineral Resource Data System (MRDS)

Philadelphia

Prospect in Amador 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. Ownership information
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10028126
MRDS ID M004950
Record type Site
Current site name Philadelphia
Alternate or previous names Richmond
Related records 10260309

Geographic coordinates

Geographic coordinates: -120.84435, 38.54712 (WGS84)
Elevation 305
Relative position ABOUT 4 MILES N. OF PLYMOUTH

Site location context

Political divisions (FIPS codes)

Amador(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)

Geographic areas

Country State County
United States California Amador

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 008N 010E 14 California

Commodities

Commodity Importance
Gold Primary

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

Nearby scientific data

(1) -120.84435, 38.54712
ListMap

Economic information

Ore body information

  • Strike N
    Dip 70 E
    Thickness 6.1M

Comments on the geologic information

  • GEOL.DESC: LARGE QUARTZ VEIN OF VARYING THICKNESS; SMALLER VEINS OCCUR ERRADICALLY IN SLATE ON EITHER SIDE OF CENTRAL VEIN; SOUTH OF OPEN-CUT AND AT DEPTH DIABASE HANGING WALL, BLOCK SLATE FOOTWALL.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No

Ownership information

  • Type Operator
    Owner J. J. Crawford

Comments on the production information

  • NO PRODUCTION RECORDED.

Workings at the site

  • Type of workings Underground
    Area 56.658HA

Comments on the workings information

  • OPEN-CUT 250 X 120 X 20 - 80 FT., INCLINED SHAFT 80 FT.; ADIT 600 FT. ON CENTRAL VEIN.

Reference information

Bibliographic references

  • Deposit

    CRAWFORD, J.J., 1896 , THIRTEENTH REPT. OF THE STATE MINERALOGIST: CMB REPT. 13 , P. 75

  • Deposit

    LOGAN, C.A., 1927 , AMADOR COUNTY: CMB REPT. 23 , P. 195

  • Deposit

    STORM, E.M., 1900 , MOTHER LODE REGION OF CAL.: CMB BULL 18 , P. 84

  • Deposit

    TUCKER, W.B., 1914 , AMADOR COUNTY: CMB REPT. 14 , P. 41

Reporter information

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