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  3. Mineral Resource Data System (MRDS)

Mammoth

Past Producer in Amador county in California, United States with commodities Gold, Arsenic
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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. Mining district
  13. Land status
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10102595
MRDS ID M005048
Record type Site
Current site name Mammoth
Alternate or previous names Nevill's Mine
Related records 10114044

Geographic coordinates

Geographic coordinates: -120.75712, 38.30602 (WGS84)
Elevation 198
Relative position AT MIDDLE BAR

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 005N 011E 10 California

Commodities

Commodity Importance
Gold Primary
Arsenic Critical Tertiary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Analytical data

Result SULFIDES 4 % OF ORE ASSAYED AS HIGH AS $ 1,500 / TON

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) -120.75712, 38.30602
ListMap

Economic information

Ore body information

  • Strike NW
    Dip 75 NE
    Depth to top 0M

Comments on the geologic information

  • GEOL.DESC: QUARTZ VEIN AVERAGE THICKNESS 8 FT; GREENSTONE HANGING WALL, SLATE FOOTWALL.

Economic information about the deposit and operations

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

Mining district

District name Jackson

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner East Bay Municipal Utility District
    Home office Oakland, Ca.
    First year 1953

Comments on the production information

  • PRODUCED SOME RICH ORE IN EARLY 1880'S. IDLE FOR MANY YEARS THEREAFTER. IN 1924 A FEW THOUSAND DOLLARS PRODUCED FROM GOLD. TOTAL OUTPUT SAID TO HAVE BEEN $ 300,000 TO $ 400,000 .

Comments on the workings information

  • VEIN REACHED BY ADIT 3,500 FT. LONG AT 800 FT. DEPTH

Reference information

Bibliographic references

  • Deposit

    CRAWFORD, J.J., 1894 , TWELFTH REPT OF THE STATE MINERALOGIST: CMB REPT. 12 , P. 78 .

  • Deposit

    IRELAN, WM. JR, 1888 , EIGTH REPT. OF THE STATE MINERALOGIST: CMB REPT. 8 , P. 93

  • Deposit

    TUCKER, W.B., 1914 , AMADOR COUNTY: CMB REPT. 14 , P. 38

General comments

Subject category Comment text
Deposit VEINLETTS OF QUARTZ RESTRICTED TO AREA AROUND CONTACT OF BLACK SLATE AND GREENSTONE.
Deposit NO OTHER INFORMATION FOUND.

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.