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Bobtail Prospect

Past Producer in Placer county in California, United States with commodities Gold, Copper
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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. Ownership information
  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 10007687
MRDS ID C012124
Record type Site
Current site name Bobtail Prospect
Related records 10285742

Geographic coordinates

Geographic coordinates: -121.23048, 38.97239 (WGS84)
Elevation 201
Relative position 7 MI. NE LINCOLN

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gold Hill(quadrangle 1:24,000 scale)

Sacramento(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

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 013N 007E 18 California

Comments on the location information

  • UTM EST. SE 1/4

Commodities

Commodity Importance
Gold Primary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Quartz Gangue

Analytical data

Result ORE SAID TO RUN $10 AU/TON.

Host and associated rocks

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

Nearby scientific data

(1) -121.23048, 38.97239
ListMap

Economic information

Ore body information

  • Strike NW
    Dip NE
    Thickness 0.91M

Economic information about the deposit and operations

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

Mining district

District name Dairy Farm

Ownership information

  • Type Owner
    Owner Recknagel, William
    First year 1935

Workings at the site

  • Type of workings Underground
    Length 27.43M
    Overall depth 18.29M

Comments on the workings information

  • SHAFT, DRIFT

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    ERIC, J. C., 1948 , TABULATION OF COPPER DEPOSITS IN CALIFORNIA IN COPPER IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 144 , P. 282 .

General comments

Subject category Comment text
Deposit VEIN 3 FT. THICK DIORITE FOOTWALL, SLATE HANGING WALL.
Deposit 320 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.