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Argo Pioneer

Past Producer in Mariposa 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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  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 10030962
MRDS ID M009476
Record type Site
Current site name Argo Pioneer
Alternate or previous names Pioneer
Related records 10260969

Geographic coordinates

Geographic coordinates: -120.09266, 37.76464 (WGS84)
Elevation 953
Relative position 7 MI. NE MARIPOSA

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Jawbone Ridge(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)

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 002S 017E 15,16 California

Comments on the location information

  • NW 1/4 15 , NE 1/4 16 UTM ACC.

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • POCKETS OF HIGH GRADE ORE

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
  • Host or associated Host
    Rock type Metamorphic Rock > Hornfels
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Nearby scientific data

(1) -120.09266, 37.76464
ListMap

Economic information

Ore body information

  • General form PINCH & SWELL
    Strike N 35 W
    Dip 52 E
    Thickness 1.52M

Controls for ore emplacement

  • Shear Zone

Comments on the geologic information

  • GEOL.DESC: VEIN IS 2 - 5 FT. THICK. BLUE-BLACK QUARTZ BIOTITE HORNFELS, BLACK QUARTZITE AND A MEDIUM-GRAINED, ALTERED INTRUSIVE ROCK, EITHER DIABASE OR DIORITE, TWO ORE SHOOTS 100 FEET APART.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1923 - 35 , 1937 , 1949

Mining district

District name Greeleyhill

Ownership information

  • Type Operator
    Owner Walter D. Mclean

Comments on the production information

  • TOTAL RECORDED PRODUCTION IS ABOUT $18,500. WORKED INTERMITTENTLY BETWEEN 1923 AND 1935; DURING WINTER OF 1937 TWO MEN RECOVERED $76.00 WORTH OF GOLD IN 3 DAYS FROM A SOIL MANTLE SOUTH OF THE SHAFT; MILLING OF 24 TONS OF DUMP MATERIAL IN 1949 YIELDED 18 OZ. OF GOLD, OR AN AVERAGE OF $26.25 PER TON. ONLY ASSESSMENT WORK DONE SINCE 1949.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 60.96M

Comments on the workings information

  • SEVERAL OPEN CUTS AND A 200-FT. INCLINED SHAFT WITH SEVERAL LEVELS AND 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. 75 - 76 , 235 .

  • Deposit

    CLARK, W. B., 1970 , GOLD DISTRICTS OF CALIF.: CDM BULL. 193 , P. 85 .

  • Production

    BOWEN AND GRAY, 1957

General comments

Subject category Comment text
Deposit VEIN, ORE SHOOTS
Deposit TWO UNPATENTED CLAIMS, THE ARGO AND THE PIONEER. ACCORDING TO THE OWNER HIGH-GRADE ORE OCCURS IN SMALL SHOOTS AND POCKETS IN WHICH SPECIMEN GOLD IS ASSOCIATED WITH QUARTZ AND PYRITE.

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.