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Demarest

Past Producer in Calaveras 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. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10102653
MRDS ID M006058
Record type Site
Current site name Demarest
Related records 10187645

Geographic coordinates

Geographic coordinates: -120.6524, 38.11658 (WGS84)
Elevation 290
Relative position 7 MI SE OF SAN ANDRES, JUST W. OF SAN DOMINGO CR.

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Salt Spring Valley(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 003N 012E 16 California

Comments on the location information

  • UTM ACC NE 1/4 SEC

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • ORE SHOOT S. OF SHAFT HAD AVE STOPE LENGTH 225 FT WITH HOUR GLASS SHAPE VIEWED LATERALLY WITH NARROWEST PORTION AT 500 FT LEVEL FROM $40,000 CAME FROM STOPE FROM 400 FT LEVEL TO WITHIN 80 FT OF SURFACE

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Analytical data

Result APPROX $9 PER TON AU IN 1934

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Mariposa Formation;Calaveras Complex
    Rock description Mariposa Formation;Calaveras Complex

Nearby scientific data

(1) -120.6524, 38.11658
ListMap

Economic information

Ore body information

  • General form PINCH & SWELL
    Strike NW
    Dip NE
    Thickness 3.05M

Comments on the geologic information

  • THREE VEINS BUT WORK ONLY ON MIDDLE VEIN WHICH IS 6 - 10 FT THICK, SM. AMT. OF COUNTRY ROCK IS GREEN SCHIST, GOUGE ON VEIN ON HANGING WALL SIDE N OF SHAFT BUT SAME DISTANCE S. OF SHAFT FLEKING OF VEIN & GOUGE PASSES TO FOOTWALL SIDE. DIKES OF MED GRAINED DIORITE ALSO PRESENT. MIDDLEVEIN ON CONTACT STRIP OF MARIPOSA SLATE - 150 FT WIDE TO W AND CALAVERA FMN SAME 200 FT WIDE TO E

Economic information about the deposit and operations

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

Comments on the production information

  • ORIGINALLY WORKED 1850'S AND IN 1860'S , 1897 - 1901 AND 1904 , 1924 - 1937 , 1938 - 39 NO PRODUCTION RECORD FOUND

Workings at the site

  • Type of workings Underground
    Area 5.666HA
    Overall depth 182.88M

Comments on the workings information

  • DEVELOPMENTS INCLUDED A 690 FT 60 DEG INCLINED SHAFT WITH LEVELS AT 100 , 300 , 400 AND 600 FT. DRIFTS FROM 300 TO 420 FT WITH ALL DRIVEN S. FROM SHAFT

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 51 - 52 , 147 AND PL 13

  • Deposit

    LOGAN, C. A., 1934 , MOTHER LODE GOLD BELT OF CALIF: CALIF. DIV. OF MINES BULL. 108 , P. 138

  • Deposit

    LOGAN, C. A., FRANKE, H., 1936 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY; CALIF. JOUR. MINES AND GEOLOGY, VOL. 32 , NO. 3 ; DIV. OF MINES, P 250 & 302

  • Production

    CLARK ( 1962 )

General comments

Subject category Comment text
Deposit VEINS, THREE VEINS BUT WORK IS ONLY ON MIDDLE VEIN WHICH IS 6 - 10 FT THICK

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.