1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Defender

Past Producer in Amador county in California, United States with commodities Gold, Zinc, Copper, Lead, Iron
Map
XML
JSON
KML
B
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. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10103048
MRDS ID M021298
Record type Site
Current site name Defender
Related records 10260348

Geographic coordinates

Geographic coordinates: -120.56184, 38.43574 (WGS84)
Relative position ABOUT 5 MILES SE OF VOLCANO

Site location context

Political divisions (FIPS codes)

Amador(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

West Point(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)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Amador

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 007N 013E 29 California

Comments on the location information

  • SE 1/4 SW 1/4 , COORDINATES EST.

Commodities

Commodity Importance
Gold Primary
Zinc Critical Tertiary
Copper Tertiary
Lead Tertiary
Iron Tertiary

Comments on the commodity information

  • FREE GOLD AND PYRITE ASSOCIATED WITH MINOR GALENA, CHALCOPYRITE, SPHALERITE ALL IN QUARTZ VEIN.

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -120.56184, 38.43574
ListMap

Economic information

Ore body information

  • Strike N 15 W
    Dip 85 SW
    Thickness 0.51M

Comments on the geologic information

  • GEOL.DESC: QUARTZ VEIN CUT BY A SERIES OF DIORITE DIKES AVERAGE 4 INCHES TO 2 FT THICK, ONE DIKE AT 200 FT LEVEL 22 FT. THICK WITH NO ORE SOUTH OF THIS DIKE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1930'S

Comments on the production information

  • LAST ORE PRODUCED ASSAYED $7 - $9/TON.

Workings at the site

  • Type of workings Underground
    Length 137.16M
    Overall depth 144.78M

Comments on the workings information

  • INCLINED SHAFT 480 FT., AT 200 FT. LEVEL DRIFTS 300 FT NORTH, 150 FT SOUTH; MOST ORE PRODUCED BETWEEN SURFACE AND 200 FT LEVEL.

Reference information

Bibliographic references

  • Deposit

    CARLSON, D.W. AND CLARK, W.B., 1954 , MINES AND MIN RES. OF AMADOR COUNTY, CAL.: CJMG VOL 50 , P. 178

  • Deposit

    TUCKER, W.B., 1914 , AMADOR COUNTY: CMB REPT. 14 , P. 27 .

  • Production

    CARLSON, D.W. AND CLARK W.B., 1954

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1978 Tatkin, T.; Albers, John P. 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.