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  3. Mineral Resource Data System (MRDS)

Little Illinois

Past Producer 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. 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 10028160
MRDS ID M004998
Record type Site
Current site name Little Illinois
Related records 10284036

Geographic coordinates

Geographic coordinates: -120.8488, 38.44657 (WGS84)
Elevation 244
Relative position ABOUT 1 MILE NE OF DRYTOWN

Site location context

Political divisions (FIPS codes)

Amador(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Amador City(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 007N 010E 23 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) -120.8488, 38.44657
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: QUARTZ VEIN WITH AVERAGE THICKNESS OF 5 FT.; SLATE FOOTWALL, GREENSTONE HANGING WALL.

Economic information about the deposit and operations

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

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner J. H. Thomas (Estate)

Workings at the site

  • Type of workings Underground
    Area 14.569HA

Comments on the workings information

  • INCLINED SHAFT 147 FT.

Reference information

Bibliographic references

  • Deposit

    LOGAN, C.A., 1927 , AMADOR COUNTY: CMB REPT 23 , P. 192

  • Deposit

    LOGAN, C.A., 1934 , MOTHER LODE BELT OF CAL.: CDM BULL. 108 , P. 120

  • Deposit

    TUCKER, W.B., 1914 , AMADOR COUNTY: CMB REPT 14 , P. 37

General comments

Subject category Comment text
Deposit GEOLOGIC DESCRIPTION BRIEF
Deposit SOME ASSESSMENT WORK REPORTEDLY DONE IN 1860'S. MINE REOPENED 1808 TO 1914 WHEN A FEW TONS OF GOOD ORE WAS MILLED. IDLE SINCE.

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.