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Black Oak Group

Past Producer in Tuolumne county in California, United States with commodities Gold, Zinc, Lead, Iron
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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 10034515
MRDS ID M021325
Record type Site
Current site name Black Oak Group

Geographic coordinates

Geographic coordinates: -120.27683, 37.9702 (WGS84)
Relative position 1 MILE W FROM SOULSBYVILLE

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Standard(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;002N 015E;015E 01;36 California

Commodities

Commodity Importance
Gold Primary
Zinc Critical Tertiary
Lead Tertiary
Iron Tertiary

Materials information

Materials Type of material
Galena Ore
Gold Ore
Marcasite Ore
Pyrrhotite Ore
Sphalerite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -120.27683, 37.9702
ListMap

Economic information

Ore body information

  • General form PINCH AND SWELL VEIN
    Strike N 15 E
    Dip 60 - 70 NW
    Thickness 7.62M

Comments on the geologic information

  • GEOL.DESC: THE VEIN SWELLS FROM 1 TO 25 FT. IN THICKNESS. SEVERAL BRANCHES OF THIS VEIN WERE IDENTIFIED COMMING FROM THE HANGING WALL BLOCK. THE DIORITE DIKE WHICH INTERSECTS THE FAULT ZONE IS 1 TO 2 FT. THICK, AND STRIKES N 55 E WITH A VERTICAL DIP. ON 1300 FT. LEVEL VEIN WAS FOUND TO BE FAULTED 110 FT. WEST. COARSE AT FAULT IS N 60 E WITH DIP OF 75 N.

Economic information about the deposit and operations

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

Workings at the site

  • Type of workings Underground
    Area 15.379HA

Comments on the workings information

  • SHAFT 1700 FT. ON 70 DEGREE INCLINE. ON 1700 FT LEVEL THE SHAFT IS 16 FT. IN THE FOOTWALL. LEVELS ON VEIN ARE 100 FT. APART. STOPING OPERATIONS AT 1000 , 1300 , 1400 AND 1500 FT. LEVELS.

Reference information

Bibliographic references

  • Deposit

    TUCKER, W. B., 1914 , TUOLUMNE COUNTY: CMB REPT. 14 , P. 138 - 140

General comments

Subject category Comment text
Deposit THIS GROUP OF CLAIMS INCLUDES THE BLACK OAK, LIVE OAK, CARRA, AND CARRA FRACTION.
Deposit ORE FORMS IN KIDNEYS AND LENSES AT THE INTERSECTION WHERE A DIORITE DIKE CROSSES A FAULT ZONE.

Reporter information

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