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Venecia Mine

Past Producer in Trinity county in California, United States with commodities Gold, Lead, Arsenic
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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. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10035881
MRDS ID M023821
Record type Site
Current site name Venecia Mine
Related records 10214615

Geographic coordinates

Geographic coordinates: -122.75582, 40.73957 (WGS84)
Elevation 930
Relative position 3 MI. NE LEWISTON ON RIDGE BETWEEN EASTMAN GULCH & JENNINGS GULCH

Site location context

Political divisions (FIPS codes)

Trinity(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lewiston(quadrangle 1:24,000 scale)

Redding(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

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Trinity

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 033N 008W 03 California

Commodities

Commodity Importance
Gold Primary
Lead Secondary
Arsenic Critical Secondary

Comments on the commodity information

  • MUCH OF GOLD OCCURED IN FREE STATE

Materials information

Materials Type of material
Galena Ore
Gold Ore
Quartz Gangue

Analytical data

Result ASSAYED $100-$600/TON IN GOLD FROM 1 FT. THICKNESS OF VEIN. SAMPLES TAKEN AT INTERVALS IN NO. 3 LEVEL ASSAYED $10-$20/TON IN GOLD.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Late Devonian
  • Host or associated Associated
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Copley Formation;Bragdon Slate
    Rock description Copley Formation;Bragdon Slate

Economic information

Ore body information

  • General form LENTICULAR LENSES
    Strike N30E, N30E
    Dip NW, 72SE
    Thickness 1.52M

Comments on the geologic information

  • META-ANDESITE OR GREENSTONE BELONGS TO COPLEY FM. FRACTURE IN FM. ON WHICH NEW ADIT WAS BEING DRIVEN, STRIKES N30E, DIPS 58 SE. 50 FT. THICK DIKE OF GRANITIC ROCK CUTS BRAGDON SLATE 50 FT. EAST OF GRUBB AND CHISMAN WORKINGS.

Economic information about the deposit and operations

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

Mining district

District name Lewiston

Comments on the production information

  • A NUMBER OF SHIPMENTS OF $400 AU ORE, AVERAGING 2-3 TONS EACH, HAVE BEEN MADE TO SMELTERS A FEW YEARS PREVIOUS TO 1941. SOME OF ORE WAS RICH ENOUGH SO THAT EXTRATION OF GOLD IN HAND MORTOR WAS FEASIBLE. A FEW TONS OF HIGH-GRADE ORE WERE PRODUCED FROM UPPER LEVEL OF GRUBB AND CHISMAN WORKINGS. A LITTLE GOOD ORE TAKEN FROM BUNCHES, AN INCH TO FEW INCHES WIDE. NO OTHER PRODUCTION RECORDS FOUND.

Comments on the workings information

  • NEWER DEVELOPMENT INCLUDES EXPLORATION BY 3 DIFFERENT LEASES. THE MOORE AND MOORE LEASE EXTENDS FROM OLD NO. 5 VENECIA LEVEL UP TO SURFACE. 90 FT OF CROSSCUTTING TO SMALL VEIN AND 115 FT. OF DRIFTS. 10 FT. STOPE. CLAYTON LEASE EXTENDS FROM VENECIA NO. 5 LEVEL DOWNWARD. NEW ADIT WAS BEING DRIVEN N30E FROM 140 FT. POINT TO FOLLOW SMALL VEIN EXPOSED BY MOORE & MOORE. THIRD LEASE OF GRUBB AND CHISMAN SEVERAL HUNDRED FT. HIGHER THAN OTHER TWO. NEW LEVEL DRIVEN ON FRACTURE IN META-ANDESITE. FOR 150 FT., RAISE 60 FT. HIGH ON DIP OF FRACTURE CONNECTS WITH 50 FT. ADIT ABOVE. PLANS CALLED FOR DRIVING ADIT 50 FT. TO EAST TO EXPLORE GRANITIC DIKE. EARLIER DETAILED DESCRIPTIONS IN TUCKER (1922).

Reference information

Bibliographic references

  • Deposit

    AVERILL, C.V., 1941, MINERAL RESOURCES OF TRINITY COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37, NO. 1, P. 64-65.

  • Deposit

    AVERILL, C.V., 19338 GOLD DEPOSITS OF THE REDDING AND WEAVERVILLE QUADRANGLES: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 29, P. 56.

  • Deposit

    BROWN, G.C., 1913, THE COUNTIES OF SHASTA, SISKIYOU AND TRINITY: CALIF. JOUR. MINES AND GEOLOGY, V. 14, P. 900.

  • Deposit

    TUCKER, W.B., 1922, TRINITY COUNTY: CALIF. JOUR. MINES AND GEOLOGY, V. 18, P. 497-498.

  • Production

    AVERILL (1941) BROWN (1913)

General comments

Subject category Comment text
Deposit ONE PATENTED CLAIM AND ADDITIONAL UNPATENTED CLAIMS INCLUDE VENICIA, HOPEFUL, BLAKEMORE, PROVIDENCE, RATTLER, DEERHORN, VENICIA AND 4 OTHER LOCATIONS. ; INFO.SRC : 1 PUB LIT
Deposit VEINS, FEW INCHES-5 FT. THICK. ORE WAS MOSTLY BASE, CONTAINING QUARTZ, GOUGE AND SULFIDES. SMALL FAULT VEIN EXPOSED IN NO. 5 LEVEL. VENICIA VEIN, 2-3 FT. THICK, AND CARRIES HIGH VALUES IN GOLD. AVG. THICKNESS OF GRADE ORE 1 FT.

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.