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  3. Mineral Resource Data System (MRDS)

Thompson

Occurrence in Shasta county in California, United States with commodities Copper, 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. Geologic structures
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10033890
MRDS ID M020540
Record type Site
Current site name Thompson
Alternate or previous names American Girl

Geographic coordinates

Geographic coordinates: -122.31442, 40.67957 (WGS84)
Relative position 8 MILES NE OF REDDING

Site location context

Political divisions (FIPS codes)

Shasta(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

City of Shasta Lake(quadrangle 1:24,000 scale)

Redding(quadrangle 1:100,000 scale)

Redding(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Shasta

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 033N 004W 34 California

Commodities

Commodity Importance
Copper Tertiary
Gold Tertiary

Comments on the commodity information

  • PYRITE MAJOR COMPONENT OF ORE

Materials information

Materials Type of material
Chalcocite Ore
Chalcopyrite Ore
Pyrite Ore
Bornite Gangue
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) -122.31442, 40.67957
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Shear Zones Exposed In Stream Bed, Strikes N 20 Degrees - 40 Degrees West And Dips Vertical. One Zone 25 Feet Wide In 1957 Contained Massive Pyrite With Some Chalcopyrite, Bornite And Quartz.

Controls for ore emplacement

  • Shear Zones

Comments on the geologic information

  • GEOL.DESC: EXPOSED IN THE PITS ARE PORPHYRITIC AND MASSIVE , FINE-GRAINED VARIETIES OF GREENSTONE AND SMALL AMOUNTS OF INTERBEDDED, SILICIFIED, FETID , DOLOMITIC LIMESTONE. GREENSTONE IN STREAM BED HAS AN APPARENT BEDDING STRIKING N 60 W - DIPPING 32 DEGREES N.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Mining district

District name East Shasta Copper-Zinc

Workings at the site

  • Type of workings Surface/Underground
    Area 194.256HA
    Overall length 121.92M

Reference information

Bibliographic references

  • Deposit

    LYDON, P. A. AND O'BRIEN, J. C., 1974 , MINES AND MINERAL RESOURCES OF SHASTA COUNTY, CALIF., COUNTY REPORT, 6 , CALIF. DIV. MINES AND GEOLOGY, PG. 40 - 41

General comments

Subject category Comment text
Deposit GOSSAN SEVERAL HUNDRED FEET WIDE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-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.