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Lookout Mountain Mine

Past Producer in Calaveras 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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10102624
MRDS ID M005779
Record type Site
Current site name Lookout Mountain Mine

Geographic coordinates

Geographic coordinates: -120.70823, 38.22297 (WGS84)
Elevation 244
Relative position 2 1/2 MI NW OF SAN ANDRES

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

San Andreas(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Calaveras(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004N 011E 01,12 California

Comments on the location information

  • UTM ACC SE 1/4 SEC 1 NE 1/4 SEC 12

Commodities

Commodity Importance
Gold Primary
Copper Tertiary

Comments on the commodity information

  • ORE LOW GRADE ($1 TO $3 PER TON AU) BUT RESERVES ARE LARGE. CONCENTRATES RANGE FROM $60 TO $90 PER TON

Materials information

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

Alteration

  • (Local) Serpentine And Pyroxenite Lie To East And Mariposa Slate To West.

Analytical data

Result ORE LOW GRADE, $1 - $3 PER TON AU

Host and associated rocks

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

Nearby scientific data

(1) -120.70823, 38.22297
ListMap

Economic information

Ore body information

  • Strike N 10 - 20 W
    Dip 80 NE
    Thickness 18.29M

Comments on the geologic information

  • QUARTZ STRINGERS AND CHLORITIC AMPHIBOLITE SCHIST, VEIN STRIKE N 10 - 20 W, SERPENTINE AND PYROXENITE LIE TO EAST AND MARIPOSA SLATE TO WEST, HANGING WALL PORPHYRY, FOOTWALL SLATE

Economic information about the deposit and operations

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

Comments on the production information

  • ACTIVE 1931 - 1938 , PROSPECTED 1946

Comments on the workings information

  • DEVELOPED BY 50 FT ADIT, 2000 FT OF DRIFTS AND CROSSCUTS, 100 FT WINZE WITH A LEVEL AT 80 FTOVER $175000 SAID TO HAVE BEEN SPENT ON THIS PROPERT Y, PRINCIPALLY UPON CHANGING MILL 3 TIMES, INSTEAD OF PROPER DEVELOPMENT OF MINE.

Reference information

Bibliographic references

  • Deposit

    CLARK, W.B., LYDON, P.A., 1962 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIF.; COUNTY REPORT 2 ; CALIF. DIV. OF MINES AND GEOLOGY, P 62 , 169 AND PLB

  • Deposit

    LOGAN, C.A., FRANKE, H., 1936 , MINES AND MINERAL RESOURCES OF CALAVERAS CO.: CDM CALIF. JOUR. MINES & GEOL., VOL. 32 , NO. 3 , P. 269 - 270 AND 311

  • Production

    CLARK ( 1962 )

General comments

Subject category Comment text
Deposit VEIN, QUARTZ STRINGERS AND CHLORITIC AMPHIBOLITE SCHIST. HANGING WALL PORPHYRY, FOOTWALL SLATE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Mateik, R.; 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.