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American Bar

Past Producer in Placer county in California, United States with commodities Gold, Lead
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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. Land status
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10034852
MRDS ID M021783
Record type Site
Current site name American Bar
Related records 10285600

Geographic coordinates

Geographic coordinates: -120.75574, 39.01267 (WGS84)
Elevation 549
Relative position 2 MI. SW MICHIGAN BLUFF

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Foresthill(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)

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 Placer

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 014N 011E 33 California

Comments on the location information

  • UTM EST. SW 1/4

Commodities

Commodity Importance
Gold Primary
Lead Secondary

Materials information

Materials Type of material
Galena Ore
Gold Ore
Pyrite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Pennsylvanian
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Plutonic Rock

Nearby scientific data

(1) -120.75574, 39.01267
ListMap

Economic information

Ore body information

  • Strike NE
    Dip SE
    Thickness 0.91M

Comments on the geologic information

  • DIKES CONTAIN MUCH PYRITE AND WEATHER RUSTY RED

Economic information about the deposit and operations

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

Mining district

District name Michigan Bluff

Land status

Ownership category National Forest

Production statistics

  • Year 1925
    Period 1923 - 1925
    Material ORE
    Accuracy Estimate
    Description Cp_Grade: ^0.5 Oz Au/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 14g/mt

Comments on the production information

  • SULFIDE REPORTEDLY LOW GRADE. LATER PRODUCTION IN 1934 - 1935 .

Workings at the site

  • Type of workings Underground
    Length 594.36M
    Overall depth 85.34M

Comments on the workings information

  • SHAFT, TUNNEL, ADITS

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. 11 - 12 .

  • Deposit

    WARING, CLARENCE A., 1917 , PLACER COUNTY: REPORT 15 OF THE STATE MINERALOGIST, CALIFORNIA STATE MINING BUREAU, P. 332 .

  • Deposit

    LOGAN, C. A., 1922 , REPORT 18 OF THE STATE MINERALOGIST, CALIFORNIA DIVISION OF MINES, P. 261 - 3 .

  • Production

    LOGAN ( 1936 )

General comments

Subject category Comment text
Deposit VEINS, 1 - 3 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.

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.