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  3. Mineral Resource Data System (MRDS)

Eureka

Past Producer in Sierra county in California, United States with commodity 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. Ore body information
  11. Economic information about the deposit and operations
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10034771
MRDS ID M021674
Record type Site
Current site name Eureka

Geographic coordinates

Geographic coordinates: -120.90104, 39.62044 (WGS84)
Relative position 1 1/4 MI. W OF FOREST

Site location context

Political divisions (FIPS codes)

Sierra(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Goodyears Bar(quadrangle 1:24,000 scale)

Portola(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Yuba(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Tahoe 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 Sierra

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 020N 010E 07 California

Comments on the location information

  • UTM N OF OREGON CREEK, IN LUCKY DOG CREEK VALLEY

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • QTZ. W COARSE ARSENOPYRITE YIELDED $300-$500/TON.

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -120.90104, 39.62044
ListMap

Economic information

Ore body information

  • Strike NW
    Dip NE

Comments on the geologic information

  • VEIN IN GABBRO PARALLELS SERPENTINE 200 FT. AWAY AT SOUTHERNMOST ADIT AND 40 FT. AT OUTCROP BELOW LAVA TO N. AT SOUTH A FEW GRANITE FRAGMENTS IN DUMP MAY INDICATE NW EXT. OF GRANITE DIKES CUTTING GABBRO IN OREGON CREEK. VEIN OCCUPIES SHEAR ZONE W GOUGE WALLS, & IS IRREGULAR; & INTERSECTED BY VERT. SHEAR ZONES WHICH ARE MINERALIZED. VEIN FORKS NEAR S END. E BRANCH MAY BE SAME AS AT OAK PROSPECT. QTZ. SHOWED NO VISIBLE AU BUT ABUNDANT SML. PYRAMIDAL XTLS. OF ARSENOPYRITE.

Economic information about the deposit and operations

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

Comments on the production information

  • NO OTHER PRODUCTION RECORDS FOUND.

Comments on the workings information

  • SHORT ADITS AND SHALLOW SHAFTS.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit VEIN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1979 Hayden, F. (Albers, J.) U.S. Geological Survey REPLACING LOST LOCATION.
Updater 13-NOV-1997 Oland, G. P. (Orris, Greta J.) U.S. Geological Survey OLAND AND ORRIS MERGED RECORDS
Editor 08-MAY-1998 Mason, George 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.