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Dairy Farm Trent, Vantrent

Past Producer in Placer county in California, United States with commodities Copper, Gold, Silver
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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. 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 10032007
MRDS ID M012051
Record type Site
Current site name Dairy Farm Trent, Vantrent
Related records 10285606

Geographic coordinates

Geographic coordinates: -121.2891, 39.03072 (WGS84)
Relative position 8 MILES NE OF SHERIDAN

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Camp Far West(quadrangle 1:24,000 scale)

Yuba City(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Bear(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Placer

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 014N 006E 27 California

Comments on the location information

  • UTM ACC ; INFO FROM LAND.ST :UNDETERMINED

Commodities

Commodity Importance
Copper Primary
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Ore

Analytical data

Result SULFIDES AVG. 3 % CU.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -121.2891, 39.03072
ListMap

Economic information

Ore body information

  • General form LENTICULAR
    Strike N 2 W
    Dip 60 E
    Width 18.29M
    Depth to top 25.91M

Comments on the geologic information

  • GEOL.DESC: FOOTWALL WAS PORPHYRY AND HANGING WALL - AMPHIBOLITE SCHIST.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No
Production years 1922; 1904-5, 1918, 1933-35

Ownership information

  • Type Owner
    Owner Dairy Farm Gold Corp.
    First year 1936

Comments on the production information

  • YIELD VARIED GREATLY; AU - $1.25 - $4 A TON, AG - FEW CENTS TO $1.70 A TON, AND CU 1 % - 15 % . NO PRODUCTION VALUES AVAILABLE.

Workings at the site

  • Type of workings Surface/Underground
    Length 2008.63M
    Overall depth 179.83M

Comments on the workings information

  • 3 - COMPARTMENT INCLINE SHAFT - 590 FT. IN DEPTH, WITH 1,000 FT. OF DRIFTS, CUTS AND RAISES ON EACH LEVEL. OPEN CUT - 600 FT. LONG, 30 FT. WIDE AT BOTTOM. SHRINKAGE SYSTEM OF MINING WAS USED.

Reference information

Bibliographic references

  • Deposit

    AUBURY, L. E. 1908 , COPPER RESOURCES IN CALIFORNIA BULL. 50 ; CALIF. MIN. BUR., P. 208 - 209

  • Deposit

    LOGAN, C. A., 1936 , GOLD MINES OF PLACER COUNTY; CALIF. JOUR. MINES AND GEOLOGY, VOL. 32 , NO. 1 ; DIV OF MINES, P. 19 - 20

  • Deposit

    WARING, C. A., 1919 ; PLACER COUNTY; 15TH REPT. STATE MINERALOGIST; CALIF. MIN. BUR.; P. 327 - 328

General comments

Subject category Comment text
Deposit ORE OCCURS AS LENSES 10 - 60 FT WIDE. CAPPED BY GOSSAN WHICH WAS WORKED FOR GOLD AND SILVER.
Deposit A CEMENT COPPER PLANT BUILT HERE IN 1960. COMPRISED OF 160 ACRES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-NOV-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.