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Napoleon

Past Producer in Calaveras county in California, United States with commodities Copper, Gold, Silver, Zinc
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10028626
MRDS ID M005714
Record type Site
Current site name Napoleon

Geographic coordinates

Geographic coordinates: -120.7299, 37.92741 (WGS84)
Relative position 6 MILES SW OF COPPEROPOLIS, 1 MILE SE OF TELEGRAPH CITY.

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Copperopolis(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower San Joaquin River(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001N 011E 23 California

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Barite Gangue
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) Sericitization

Host and associated rocks

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

Nearby scientific data

(1) -120.7299, 37.92741
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Shear Zone Strikes N 75 W Dips 65 - 75 Se

Ore body information

  • General form LENTICULAR/IRREGULAR
    Thickness 6.1M
    Length 21.34M
    Depth to bottom 76.2M

Controls for ore emplacement

  • Shear Zone

Comments on the geologic information

  • GEOL.DESC: ROCKS IN VICINITY OF THE MINE CONSISTS OF ANDESITIC LAVAS WHICH ARE APHANTIC IN SOME PLACES VESICULAR OR AMYGDALOIDAL. THESE VOLCANIC ROCKS HAVE UNDERGONE LOW-GRADE METAMORPHISM TO GREENSTONES AND GREEN SCHISTS. MINE AREA IS A SHEAR ZONE 6 - 30 FT. WIDE IN QUARTZ PORPHYRY AND FELSITE.

Economic information about the deposit and operations

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

Comments on the production information

  • NO PRODUCTION VALUES; DISCOVERED 1860 BY 1927 REPORTED PRODUCTION OF $1.2 MILLION OF CU AND AG. IN 1881 , 1600 TONS WAS SHIPPED, IT AVERAGED 11.25 % CU .26 OZ AU, AND 5.7 OZ AG. CEMENT COPPER WAS PRODUCED 1900 - 1915 . ZINC PRODUCTION UNDETERMINED.

Workings at the site

  • Type of workings Underground
    Overall depth 131.06M

Comments on the workings information

  • THREE SHAFTS - TWO ARE CAVED;FOUR MAIN LEVELS 100 , 250 , 300 , 375 FT. 1942 - 43 MOUNTAIN COPPER CO., LTD, REHABILITATED THE 3RD SHAFT 280 FT. DEEP AND DRILLED 10 TEST HOLES ON 250 FT. LEVEL.

Reference information

Bibliographic references

  • Deposit

    CLARK,W.B. AND LYDON,P.A., 1962,MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIFORNIA; COUNTY REPT. 2 , CALIF. DIV. MINES AND GEOLOGY, P. 27 .

  • Deposit

    GOODWIN, J.G., 1957 , LEAD AND ZINC IN CALIFORNIA; CALIF. JOUR. MINES AND GEOLOGY, VOL. 53 , NO. 354 , P. 433 .

  • Deposit

    HEYL, G.R., 1948 , ZINC-COPPER MINES OF THE QUAIL HILL AREA, CALAVERAS, CALIFORNIA; COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 122 - 124

General comments

Subject category Comment text
Deposit 3 ORE BODIES, LARGEST IS THE DISCOVERY, THE OTHER TWO, LOCATED BETWEEN 250 - 375 FT. LEVELS. THESE LENSES HAD AN EASTWARD PITCH OF 65 - 70 DEGREES.

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.

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.