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Mason and Thayer

Past Producer in Trinity county in California, United States with commodities Gold, Copper
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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. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  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 10035846
MRDS ID M023771
Record type Site
Current site name Mason and Thayer
Alternate or previous names Craig

Geographic coordinates

Geographic coordinates: -123.01778, 40.84178 (WGS84)
Elevation 1280
Relative position 1.7 MI. E. DEDRICK LOOKOUT POINT

Site location context

Political divisions (FIPS codes)

Trinity(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Dedrick(quadrangle 1:24,000 scale)

Hayfork(quadrangle 1:100,000 scale)

Redding(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Trinity(hydrologic unit)

Klamath(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Shasta-Trinity National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Trinity

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 035N 010W 33 California

Comments on the location information

  • UTM ACC. LAND UNSURVEYED FOR TOWNSHIP-RANGE. PROJECTED

Commodities

Commodity Importance
Gold Primary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Calcite Gangue
Quartz Gangue

Analytical data

Result BODY OF BASE ORE ASSAYED. $3-$5/TON IN GOLD LOGAN REPORTS THAT SEVERAL YEARS PREVIOUS TO 1926, 880 SAMPLES FROM ALL PARTS OF THE MINE AVG. $7.10/TON FOR AVERAGE THICKNESS OF ABOUT 3 FT.

Host and associated rocks

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

Economic information

Ore body information

  • General form LENSES
    Strike N70E
    Dip 45SE
    Thickness 1.83M

Comments on the geologic information

  • DIORITIC DIKES, 6-60 FT. THICK, CUT SCHIST. SOME PYRITE OCCURS IN COARSE CUBES.

Economic information about the deposit and operations

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

Mining district

District name Canyon Creek

Land status

Ownership category National Forest

Comments on the production information

  • LATER STATEMENTS BY AVERILL INDICATE ABOUT 9000-10,000 TONS OF $6 ORE WAS PRODUCED. NO OTHER PRODUCTION DATA FOUND

Workings at the site

  • Type of workings Underground
    Overall depth 128.02M

Comments on the workings information

  • MILL-TUNNEL LEVEL,2000 FT. LONG, 1200 FT. OF WHICH WAS DRIFTING 70 FT. ABOVE, 260 FT. OF DRIFTS. 2 RAISES BETWEEN THESE LEVELS. 60 FT. HIGHER, 260 FT. OF DRIFTS AND A RAISE TO SURFACE. 350 FT. OF DRIFTING DONE A BODY OF BASE ORE IN ADIT BELOW MILL-TUNNEL LEVEL. LOGAN (1926) DESCRIBES AT LEAST 4 LEVELS OF WORKINGS.

Reference information

Bibliographic references

  • Deposit

    BROWN, G. CHESTER, 1913, THE COUNTIES OF SHASTA, SISKIYOU AND TRINITY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 14, PT. 4, P. 887

  • Deposit

    AVERILL, C.V., 1933, GOLD DEPOSITS OF THE REDDING AND WEAVERVILLE QUADRANGLES CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 29, P. 36

  • Deposit

    LOGAN, C.A., 1926, TRINITY COUNTY: CALIF. JOUR. MINES AND GEOLOGY, V. 22, P. 16-17

  • Deposit

    FERGUSON, 1912, GOLD LODES OF WEAVERVILLE QUADRANGLE: U.S. GEOLOGICAL SURVEY BULL. 540, P. 78

  • Production

    LOGAN (1926) AVERILL (1933)

General comments

Subject category Comment text
Deposit VEINS. ORE SHOOT 170 FT. LONG, 3 FT. THICK. QUARTZ CUTS SCHIST AT ALMOST A RIGHT ANGLE TO SCHISTOSITY. VEIN 3 IN.-6 FT. THICK. ORE EXTREMELY STREAKY AND IRREGULAR.
Deposit 17 CLAIMS ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1980 Nelson, Scott C. (Albers, John, P.) 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.