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Harvard Mine Group

Past Producer in Tuolumne 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. Mining district
  13. Land status
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10077946
MRDS ID W026030
Record type Site
Current site name Harvard Mine Group
Related records 10238351, 10165658

Geographic coordinates

Geographic coordinates: -120.43767, 37.94631 (WGS84)
Elevation 457
Relative position ONE MILE S.W. OF JAMESTOWN, S. AND ADJACENT TO THE CRYSTALLINE MINE.

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sonora(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Tuolumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Tuolumne

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001N 014E 16 California

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Rock unit name Cosumnes Formation;Logtown Ridge Formation
    Rock description Cosumnes Formation;Logtown Ridge Formation

Nearby scientific data

(1) -120.43767, 37.94631
ListMap

Economic information

Ore body information

  • Strike NW
    Dip E

Comments on the geologic information

  • HOST ROCKS INCLUDE UNNAMED SERPENTINE, COSUMNES FM SLATE, AND LOGTOWN RIDGE FM SERICITE AND CHLORITE SCHISTS. ; GEOL.DESC: SERPENTINE FOOTWALL, SCHIST AND SLATE ON HANGING WALL. INITIALLY HIGH-GRADE ORE EXTRACTED FROM NARROW QUARTZ VEINS IN SERPENTINE; LATER ORE FROM QUARTZ STRINGERS IN MINERALIZED SCHIST WHICH WAS LOW-GRADE.

Economic information about the deposit and operations

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

Mining district

District name Mother Lode Belt

Land status

Ownership category Private

Comments on the workings information

  • MINE OPENED THROUGH 2 SHAFTS 1,000 FT. APART. NORTH SHAFT 700 FT. WITH WINZE TO 1850 FT. LEVEL; THE SOUTH SHAFT HAS LEVELS AT 150 FT. INTERVALS. LATEST DEVELOPMENT CONSISTS OF DRILLING AND DRIFTING.

Reference information

Bibliographic references

  • Deposit

    LOGAN, C.A., 1928 , SACRAMENTO FIELD DIV. TUOLUMNE COUNTY: CDM REPT. 24 , P. 18

  • Deposit

    LOGAN, C.A., 1949 , MINES AND MIN. RES. OF TUOLUMNE COUNTY, CAL.: CDM REPT 45 , P. 65

  • Production

    LOGAN, C.A., 1928

General comments

Subject category Comment text
Deposit NARROW VEINS, QUARTZ STRINGERS
Deposit THIS GROUP OF CLAIMS INCLUDES MC CANN, MOONEY, PACIFIC, VULTURE, TRIO, AND SOBRANTE. THESE EXTEND FOR A TOTAL DISTANCE OF NEARLY 1 MILE. DEVELOPMENT BEGAN IN 1850 AND WAS WORKED INTERMITTANTLY UNTIL THE 1940 'S. SEVERAL ORE SHOOTS UP TO 200 FT IN LENGTH HAVE BEEN DEVELOPED OVER THE YEARS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1978 Albers, J.; Tatkin, T. 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.