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  3. Mineral Resource Data System (MRDS)

Black Oak

Past Producer in Placer 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. Mining district
  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 10101364
MRDS ID C012302
Record type Site
Current site name Black Oak
Related records 10140373

Geographic coordinates

Geographic coordinates: -120.94381, 39.01683 (WGS84)
Elevation 572
Relative position 3 1/2 MI. SE WEIMAR

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Colfax(quadrangle 1:24,000 scale)

Truckee(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

North Fork American(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 009E 35 California

Comments on the location information

  • UTM ACC. E 1/2 , SW 1/4

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Analytical data

Result EST. ASSAY $5.60 - $9 AU/TON

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate

Nearby scientific data

(1) -120.94381, 39.01683
ListMap

Economic information

Ore body information

  • General form PINCH & SWELL
    Strike N 10 W
    Dip 52 E
    Thickness 5.49M

Comments on the geologic information

  • FOOTWALL HARD DIKE

Economic information about the deposit and operations

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

Mining district

District name New England Mills

Comments on the production information

  • CLAIMED TO HAVE BEEN AN IMPORTANT PRODUCER, BUT NO OFFICAL RECORD IS AVAILABLE.

Workings at the site

  • Type of workings Underground
    Length 457.2M
    Overall depth 177.39M

Comments on the workings information

  • SEVERAL ADITS, SHAFTS

Reference information

Bibliographic references

  • Deposit

    LOGAN, C. A., 1936 , GOLD MINES OF PLACER COUNTY, CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 32 , NO. 1 , P. 13 - 14 .

  • Deposit

    WARING, CLARENCE A., 1917 , PLACER COUNTY: REPORT 15 OF THE STATE MINERALOGIST, CALIFORNIA STATE MINING BUREAU, P. 334 .

General comments

Subject category Comment text
Deposit VEIN, 3 % SULFIDES, FEW INCHES TO 18 FT. THICK

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1979 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.