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  3. Mineral Resource Data System (MRDS)

Big Oak Tree Quartz

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 10007742
MRDS ID C012316
Record type Site
Current site name Big Oak Tree Quartz
Alternate or previous names Milford

Geographic coordinates

Geographic coordinates: -120.98075, 39.10239 (WGS84)
Elevation 701
Relative position 1 MI. W COLFAX

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)

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 015N 009E 33 California

Comments on the location information

  • UTM EST. SE 1/4

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • ORE AVG. $28 /TON.

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase

Nearby scientific data

(1) -120.98075, 39.10239
ListMap

Economic information

Ore body information

  • Strike N 80 E
    Dip 80 N
    Thickness 0.46M

Economic information about the deposit and operations

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

Mining district

District name Colfax

Comments on the production information

  • SOME PRODUCTION 1883 - 1887 , 1924 , 1926

Workings at the site

  • Type of workings Underground
    Length 304.8M
    Overall depth 87.48M

Comments on the workings information

  • 2 INCLINED SHAFTS, 5 DRIFTS, WINZE

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 .

  • Deposit

    IRELAND, W., JR., 1888 , REPORT OF THE STATE MINERALOGIST: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, VOL. 8 , P. 463 .

  • Deposit

    WARING, CLARENCE A., 1917 , PLACER COUNTY: REPORT 15 OF THE STATE MINERALOGIST, CALIFORNIA STATE MINING BUREAU, P. 333 .

  • Production

    LOGAN, 1936

General comments

Subject category Comment text
Deposit VEIN AVG. 18 IN. THICK
Deposit ADJOINS RISING SUN MINE ON THE SOUTH, 10 ACRES ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1979 Nelson, Scott C. (Albers, John, P.) U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan 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.