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Clearinghouse

Past Producer in Mariposa county in California, United States with commodities Gold, Silver, Lead, Copper, Zinc
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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. Ownership information
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10102910
MRDS ID M009851
Record type Site
Current site name Clearinghouse
Alternate or previous names Anderson I, Ferguson Original, Moonstone, Golden Rule, El Portal.
Related records 10285941

Geographic coordinates

Geographic coordinates: -119.86487, 37.67326 (WGS84)
Elevation 488
Relative position 7 MI W OF EL PORTAL

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

El Portal(quadrangle 1:24,000 scale)

Yosemite Valley(quadrangle 1:100,000 scale)

Mariposa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Merced(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Federal lands

Stanislaus National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 003S 019E 16,21,22,27 California

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Secondary
Copper Secondary
Zinc Critical Tertiary

Comments on the commodity information

  • THE SULFIDE CONTENT OF THE ORE IS ABOUT TWICE AS GREAT IN THE SHOOTS OF THE FERGUSON VEIN AS IN SHOOTS OF THE ORIGINAL VEIN. NATIVE GOLD IN RIBBON QUARTZ.

Materials information

Materials Type of material
Gold Ore
Silver Ore
Sphalerite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock

Nearby scientific data

(1) -119.86487, 37.67326
ListMap

Economic information

Ore body information

  • Strike N 8.5 E
    Dip 78 E

Comments on the geologic information

  • GEOL.DESC: ATTITUDES: FERGUSON VEIN N 21 E 70 W ORIGINAL VEIN - N 8.5 E, 78 E TO A DEPTH OF 400 FT THE ORIGINAL VEIN LIES IN SLATY METASEDIMENTS; BELOW THAT THE WALL ROCK IS COARSE-GRAINED BIOTITE GRANODIORITE WHICH INTRUDES ROUGHLY PARALLEL TO SLATY CLEAVAGE & SCHISTOSITY. FERGUSON VEIN FOLLOWS GRANODIORITE-METASEDIMENTS CONTACT. METASEDIMENTS INCLUDE SLATE, QTZ-BIOTITE HORNFELS. GRAPHITE-MICA SCHIST & SOME QUARTZ-BIOTITE GNEISS. NUMEROUS ORE SHOOTS AVE 4-5 FT THICK AND 100-150 FT WIDE. THREE LATERAL QUARTZ VEINS - THE SPANISH, GOLDEN RULE AND MOONSTONE VEINS, JOIN THE FERGUSON VEIN FROM THE NE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1860
Production years 1860S , 1911 - 1937 , 1935 - 1940

Mining district

District name Clearinghouse

Ownership information

  • Type Operator
    Owner Mrs. Frank E. Gallagher

Production statistics

  • Year 1937
    Period - 1937
    Material AU
    Accuracy Accurate
    Description Cp_Grade: ^ .14 Oz/Ton Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Silver Silver 4g/mt
  • Year 1937
    Period - 1937
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^Original .454 Oz/Ton Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 13g/mt

Comments on the production information

  • THE MINE HAS BEEN AMONG THE 10 HIGHEST PRODUCING MINES IN THE COUNTY, TOTAL PRODUCTION BEING IN EXCESS OF $3,350,000. CLAIMS OF THE FERGUSON HAVE YIELDED AN ESTIMATED PRODUCTION OF $1,250,000 AND RECORDED PRODUCTION BT. 1935 AND 1940 OF $107,000, A TOTAL OF $1,357,000. BT. 1911 AND 1937 CLAIMS OF THE ORIGINAL MINE YIELDED 79,636.79 OZ. OF GOLD, 25,364 OZ. OF SILVER, 340 LBS. OF COPPER AND 134 LB. OF LEAD FROM 175,156 TONS OF ORE. COPPER PRODUCTION LESS THAN 100,000 LBS. - D.O.M. BULL. 144, PT. 3, 1948, P. 269

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 457.2M

Comments on the workings information

  • 9 LEVELS TO MAIN SHAFT OF ORIGINAL MINE. AT 650 LEVEL A 1200 FT CROSSCUT CONNECTS W. FERGUSON VEIN WHICH IS DEVELOPED BY SHAFT A 5 ADIT LEVELS. TOTAL DRIFTS ARE THOUSANDS OF FEET. SUPERFICIAL WORKINGS NEARBY.

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B., 1970 , GOLD DISTRICTS OF CALIF.: CDM BULL. 193 , P. 37-38 .

  • 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. 85 - 90 , 250 , 551 .

  • Deposit

    BOWEN, O. E., 1962 , MINES NEAR YOSEMITE: CDM MINERAL INFO. SERVICE, VOL 15 , NO 3 , P. 2 .

  • Deposit

    CASTELLO, W. O., 1921 , MARIPOSA COUNTY: 17TH REPORT STATE MINERALOGIST ( FOR 1920 ), P. 131 .

  • Production

    BOWEN & GRAY, 1957

General comments

Subject category Comment text
Deposit TEN PATENTED CLAIMS, THE ORIGINAL , ORIGINAL NO. 2, SO. ORIGINAL EXT. EL PORTAL, ANDERSON, NO. EXT. OF THE ANDERSON, GOLDEN RULE, GOLDEN RULE NO. 2, MOONSTONE AND MOONSTONE NO. 2, TOTALING ABOUT 190 ACRES.
Deposit QUARTZ VEINS, ORE SHOOTS

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.

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.