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Alabama

Past Producer in Placer county in California, United States with commodities Gold, Silver, Lead, Copper, Bismuth, Antimony, 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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Production statistics
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10007685
MRDS ID C012112
Record type Site
Current site name Alabama
Related records 10286128

Geographic coordinates

Geographic coordinates: -121.15797, 38.84406 (WGS84)
Elevation 171
Relative position 1 MI. SE PENRYN

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rocklin(quadrangle 1:24,000 scale)

Sacramento(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower 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 012N 007E 35 California

Comments on the location information

  • UTM ACC. SE 1/4

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Secondary
Copper Secondary
Bismuth Critical Tertiary
Antimony Critical Tertiary
Arsenic Critical Tertiary

Materials information

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

Alteration

  • (Local) Sulfides Oxidized In Irregular Places To Depth Of 1045 Ft.

Analytical data

Result ASSAYS AVG. $9 AU/TON. CONC.:9 OZ AU, 120 OZ AG/TON.

Host and associated rocks

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

Nearby scientific data

(1) -121.15797, 38.84406
ListMap

Economic information

Ore body information

  • Strike N
    Dip 90
    Thickness 2.13M

Comments on the geologic information

  • 2-4 IN. GOUGE ZONE ALONG BOTH WALLS OF VEIN.

Economic information about the deposit and operations

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

Production statistics

  • Year 1942
    Period 1933-1942
    Accuracy Estimate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Gold Gold 254g/mt
  • Year 1942
    Period 1933-1942
    Accuracy Estimate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 762g/mt

Comments on the production information

  • AG/AU WAS 3:1. 75% AU FROM FLOTATION CELLS, 25% AU AND 100% AG FROM CONCENTRATES. FIRST WORKED IN 1850'S. NO PRE-1933 PRODUCTION RECORD FOUND.

Workings at the site

  • Type of workings Underground
    Length 1524M
    Overall depth 152.4M

Comments on the workings information

  • 2 SHAFTS, DRIFTS, STOPES, SEVERAL LEVELS.

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. 10 - 11 .

  • Deposit

    LOGAN, C. A., 1935 , REVIEW OF GOLD MINING IN EAST-CENTRAL CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 31 , NO. 1 , P. 17 .

  • Deposit

    GOODWIN, J. G., 1957 , LEAD AND ZINC IN CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 53 , NOS. 3 AND 4 , P. 588 .

  • Production

    LOGAN, 1936

General comments

Subject category Comment text
Deposit SEAM, IRREGULAR
Deposit PATENTED. ; 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 HOST ROCK TYPE
Updater 17-OCT-1991 Mosier, Dan U.S. Geological Survey CHECKED. DELETED HOST ROCK FROM IGNEOUS ROCK TYPE.
Editor 27-APR-1995 Mosier, Dan U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD

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.