1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Mar John Mines Co.

Past Producer in Calaveras county in California, United States with commodities Gold, Cobalt, Lead, Zinc
Map
XML
JSON
KML
B
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 10029485
MRDS ID M007034
Record type Site
Current site name Mar John Mines Co.
Alternate or previous names Old Calaveras Group, Calaveras, Enchantress, Oro Minto

Geographic coordinates

Geographic coordinates: -120.54851, 38.18685 (WGS84)
Elevation 671
Relative position 2 MI SE OF SHEEP RANCH

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Calaveritas(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 013E 21 California

Comments on the location information

  • UTM ACC SW 1/4 OF NW 1/4

Commodities

Commodity Importance
Gold Primary
Cobalt Critical Secondary
Lead Tertiary
Zinc Critical Tertiary

Comments on the commodity information

  • COBALT MINED AT N. END OF PROPERTY

Materials information

Materials Type of material
Galena Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
  • Host or associated Host
    Rock type Metamorphic Rock > Schist > Mica Schist

Economic information

Ore body information

  • Strike N 70 E
    Dip SE
    Thickness 1.22M

Comments on the geologic information

  • COUNTRY ROCK IS CALAVERAS FMN.

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 1870'S - 1884 , FROM 1885 - 1938 INTERMITTENT WORK DONEOLD CALAVERAS GROUP WORKED AS EARLY AS 1872.

Workings at the site

  • Type of workings Underground
    Overall depth 137.16M

Comments on the workings information

  • DEVELOPED BY 450 FT (MAR JOHN OR CALAVERAS) SHAFT WITH LEVELS AT 120 , 240 , 350 AND 450 FT AND A 350 FT SHAFT 400 FT TO SE. MOST OF STOPING BTWN TWO SHAFTS-CROSSCUTS DRIVEN TO NW AND SE FROM 350 FT LEVEL

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 36 , 62 - 63 , 131 , 165 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. 271 - 4 , 304 AND 312

  • Production

    CLARK ( 1962 )

General comments

Subject category Comment text
Deposit VEINS, FIVE VEINS FROM 2 - 4 FT IN THICKNESS AND TREND NE, PRINCIPAL VEIN IS CALAVERAS (N 70 E AND DIPS SE). SMALL AMOUNTS OF DIORITE AND GABBRO ALSO IN DUMPS. IN COBALT PROSPECT SMALL AMOUNTS OF SMALTITE AND ERYTHRITE WITH ARSENOPYRITE FOUND IN QUARTZ STRINGER A FEW INCHES WIDE IN MICA SCHIST AND QUARTZITE. FIVE VEINS ARE; CALAVERAS 3 - 4 FT, WASHINGTON PESCIA 6 FT, INTERMEDIATE 1.5 FT, ENCHANTRESS 2 FT AND SOUTH BANK 2.5 FT IN THICKNESS

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.