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La Grange

Producer in Stanislaus county in California, United States with commodities Gold, Platinum, Osmium, Iridium
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10038057
MRDS ID M045327
Record type Site
Current site name La Grange
Alternate or previous names Tuolumne River
Related records 10287176

Geographic coordinates

Geographic coordinates: -120.47044, 37.66631 (WGS84)
Elevation 53
Location accuracy 100(meters)
Relative position ON TUOLUMNE RIVER EXTENDING WESTWARD 9 MI FROM LA GRANGE, 22 MI EAST OF MODESTO

Site location context

Political divisions (FIPS codes)

Stanislaus(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

La Grange(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower San Joaquin River(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Stanislaus

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 003S;003S;003S 012E;013E;014E 25,36;24,25,301,02,036;18,19 California

Comments on the location information

  • LOCATION GIVEN IS FOR MILE 50 MARKER ON RIVER NEAR TOWN OF LA GRANGE, SHOWN ON LA GRANGE TOPO MAP

Commodities

Commodity Importance
Gold Primary
Platinum Critical Secondary
Osmium Tertiary
Iridium Critical Tertiary

Materials information

Materials Type of material
Gold Ore

Analytical data

Result PGE SAMPLES AVERAGED: 72% PT, 18% OSMIRIDIUM (LOGAN)

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Rock unit name Ione Formation
    Rock description Ione Formation
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Holocene

Nearby scientific data

(1) -120.47044, 37.66631
ListMap

Economic information

Ore body information

  • General form STREAM SEDIMENT DEPOSITS
    Thickness 10.67M
    Length 14483.7M
    Width 804.65M
    Depth to top 2.44M

Controls for ore emplacement

  • Stream Hydraulics

Comments on the geologic information

  • FALSE BEDROCK OF VOLCANIC ASH

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No

Ownership information

  • Type Operator
    Owner Tuolumne Gold Dredging Corp.
    First year 1945

Comments on the production information

  • 0.00003 OZ/TON (1 PPB) PT. IN 1920'S AU = $.116/YD BUT LATER RECOVERIES WERE PROBABLY LESS

Comments on the workings information

  • HYDRAULIC AND DREDGING

Reference information

Bibliographic references

  • Deposit

    LOGAN, C.A., 1919, PLATINUM AND ALLIED METALS IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 85, P. 33

  • Deposit

    CLARK, W.B., 1970, GOLD DISTRICTS OF CALIFORNIA: CALIFORNIA DIVISION OF MINES AND GEOLOGY BULLETIN 193, P. 85-86.

  • Deposit

    CLARK, W.B., 1970, PLATINUM: CALIFORNIA DIVISION OF MINES AND GEOLOGY MINERAL INFORMATION SERVICE, V. 23, NO. 6, P. 115-123.

General comments

Subject category Comment text
Deposit A PLEISTOCENE RIVER CHANNEL 2 MI SOUTH OF LA GRANGE WAS ALSO DREDGED 1.5 MI LONG AND 0.25 MI WIDE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-74 Blair, Will N. U.S. Geological Survey
Updater 01-JAN-89 Peterson, Jocelyn A. 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.