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Bachman Mine

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. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10102640
MRDS ID M005954
Record type Site
Current site name Bachman Mine
Alternate or previous names Backman

Geographic coordinates

Geographic coordinates: -120.62962, 38.12769 (WGS84)
Elevation 329
Relative position 7 MI S. OF SAN ANDRES NEAR SAN ANDRES AND ANGELS ROAD

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
003N 012E 10,11 California

Comments on the location information

  • UTM ACC, NE 1/4 NE 1/4 SEC. 10 ; SW 1/4 NW 1/4 SEC 11

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Analytical data

Result ASSAYED LOW ON 110 FT LEVEL. GOOD ASSAYS REPORTED NE AR FACE OF SE DRIFT ON 285 FT LEVEL.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -120.62962, 38.12769
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Sm. Faults Offset Veins

Ore body information

  • Strike NW
    Dip E
    Width 1.68M

Comments on the geologic information

  • GEOL.DESC: HANGING WALL INTERBEDDED SLATE AND SCHIST, FOOTWALL OF GREENSTONE, FAULT AT 285 FT LEVEL WITH N & W DISPLACEMENT OF VEIN TWO MAIN VEINS, ONE RUNNING NW, THE OTHER E, THEY CONVERGE TO N. SEVERAL OTHER VEINS RUN FROM THE THORPE MINE INTO BACHMAN

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1894 - 1914 , 1921

Comments on the production information

  • NO PRODUCTION RECORD FOUND ACTIVE INTERMITTENTLY IN 1920S AND 1930S , FREE MILLING ORE. ORE IN 1921 PAID WELL.

Workings at the site

  • Type of workings Underground
    Area 8.094HA
    Overall depth 145.69M

Comments on the workings information

  • DEVELOPED BY SEVERAL SHAFTS 70 , 305 AND 478 FT RESPECTIVELY. 305 FT SHAFT HAD 75 DEG ANGLE WITH 110 AND 285 FT LEVELS WITH DRIFTS AND CROSS CUTS.

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 136

  • Deposit

    KERR, M. B., 1900 , REGISTER OF MINES AND MINERALS, COUNTY OF CALAVERAS, CALIF: CALIF. MIN. BUR.

  • Deposit

    LOGAN, C. A., 1934 , THE MOTHER LODE GOLD BELT OF CALIF.: CALIF. DIV. OF MINES BULL. 108 P. 143

  • 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 297

  • Deposit

    5) TUCKER, W. B., 1915 ; CALAVERAS COUNTY: 14TH REPT. STATE MIN.; CALIF. MIN. BUR., P 69

  • Production

    CLARK ( 1962 )

General comments

Subject category Comment text
Deposit VEINS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-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.