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Black Spider

Past Producer in Mariposa county in California, United States with commodities Gold, Silver
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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. Ownership information
  13. Production statistics
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10102872
MRDS ID M009514
Record type Site
Current site name Black Spider
Alternate or previous names Gray Eagle, Blue Jay
Related records 10140355

Geographic coordinates

Geographic coordinates: -120.13988, 37.65492 (WGS84)
Relative position 6 MI. SE OF COULTERVILLE

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Coulterville(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Merced(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 003S 017E 19 California

Comments on the location information

  • ADJOINS FLYAWAY GROUP OF MINES ON NW. UTM EST. SEC LINES PROJECTED.

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Gold Ore
Silver Ore
Quartz Gangue

Host and associated rocks

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

Nearby scientific data

(1) -120.13988, 37.65492
ListMap

Economic information

Ore body information

  • Strike N 60 W
    Dip 50 NE

Comments on the geologic information

  • GEOL.DESC: IN POCKETS, AND IN SULFIDE IMPREGNATED SERPENTINE. QUARTZ VEIN AT CONTACT OF GREENSTONE (NE) AND SERPENTINE (SW).

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1935

Ownership information

  • Type Operator
    Owner Walter Mclean

Production statistics

  • Year 1935
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^Au .2 Oz/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 6g/mt

Comments on the production information

  • DURING 1935 ABOUT 480 TONS OF ORE YIELDED 85.48 OZ AU. WORKED BY HAND METHODS. IN 1954 AU & AG RECOVERED BY AMALGAMATION.

Comments on the workings information

  • IN 1914, A 133-FT. INCLINED SHAFT, 355 FT. OF DRIFTS, 300-FT. CROSSCUT TUNNEL AND TWO STOPES.

Reference information

Bibliographic references

  • Deposit

    BOWEN, O. E., JR., & GRAY, H., JR., 1957 , MINES AND MINERAL DEPOSITS OF MARIPOSA COUNTY, CALIF.: CALIF. JOUR. MINES & GEOL., VOL. 53 , NOS. 1 & 2 , P. 242 .

  • Deposit

    WALLACE, R. E., ETAL, 1957 , THE MINERAL INDUSTRY OF CALIF.: US BUR. OF MINES MINERALS YEARBOOK FOR 1954 , VOL. 3 , P. 220 .

  • Production

    REF. 1 AND REF. 2 .

General comments

Subject category Comment text
Deposit QUARTZ VEIN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-DEC-1978 Hayden, F. (Albers, J.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

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.