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Thayer

Producer in Amador county in California, United States with commodities Copper, Lead, 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. Economic information about the deposit and operations
  13. Land status
  14. Ownership information
  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 10028069
MRDS ID M004856
Record type Site
Current site name Thayer
Alternate or previous names Greyhouse, Grey House
Related records 10259935

Geographic coordinates

Geographic coordinates: -120.88519, 38.25463 (WGS84)
Relative position 10 MILES SW OF IONE

Site location context

Political divisions (FIPS codes)

Amador(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ione(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

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 010E 28,33 California

Commodities

Commodity Importance
Copper Primary
Lead Secondary
Zinc Critical Secondary

Materials information

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

Alteration

  • (Local) Sericitization, Silicification, Pyritization.

Host and associated rocks

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

Nearby scientific data

(1) -120.88519, 38.25463
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Faults; 3 Types, 1)East Dipping High-Angle Strike Faults, 2)Low-Angle Reverse Faults, Strike N50w - N., Dip 25 - 50 E. 3)High-Angle Faults, Strike Ne. Folds With Awplitudes 1 - 6 Ft., Plunge 78 - 84 N, Most Overturned With Axial Planes Dipping Eastward At High Angles.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Land status

Ownership category Private

Ownership information

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

Comments on the production information

  • NO PRODUCTION REPORTED.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 76.2M

Comments on the workings information

  • DEVELOPED BY CUTS AND ONE SHAFT 250 FT. DEEP WITH LEVELS AT 40 , 200 , 240 FT. 40 FT. LEVEL CONSISTS OF CROSSCUT 210 FT. EAST AND 30 FT. WEST OF SHAFT. 240 FT. LEVEL HAS A CROSSCUT AND DRIFT EXTEND ABOUT 700 FT. NW.

Reference information

Bibliographic references

  • Deposit

    AUBURY, L.E., 1908 , COPPER RESOURCES OF CALIFORNIA BULL. 50 ; CALIF. MIN. BUR., P. 225

  • Deposit

    GOODWIN, J.G., 1957 , LEAD AND ZINC IN CALIFORNIA; CALIF. JOUR. MINE AND GEOLOGY; VOL 53 , NO. 314 , P. 419

  • Deposit

    HEYL, G.R., 1948 , GRAYHOUSE AREA, AMADOR COUNTY, CALIFORNIA; COPPER IN CALIFORNIA BULL 144 ; DIV. OF MINES, P. 85 - 91

General comments

Subject category Comment text
Deposit DISSEMINATED SULFIDES IN SHEARED META-VOLCANIC INTRUDED BY QUARTZ PORPHYRY.

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.

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.