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  3. Mineral Resource Data System (MRDS)

La Porte

Producer in Plumas county in California, United States with commodities Gold, Platinum
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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. Mining district
  15. Land status
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10038013
MRDS ID M045262
Record type Site
Current site name La Porte
Related records 10163999

Geographic coordinates

Geographic coordinates: -120.98354, 39.68905 (WGS84)
Elevation 1524
Location accuracy 100(meters)
Relative position 25 MI SOUTH OF QUINCY, 50 MI NORTHEAST OF OROVILLE, Acc Within Placered Area

Site location context

Political divisions (FIPS codes)

Plumas(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

La Porte(quadrangle 1:24,000 scale)

Portola(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Yuba(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Plumas 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 Plumas

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 021N 009E California

Comments on the location information

  • IN PLUMAS NATIONAL FOREST. LOCATION GIVEN IS FOR PLACER DIGGINGS AT SPANISH FLAT LESS THAN 1 MI SOUTHEAST OF LA PORTE

Commodities

Commodity Importance
Gold Primary
Platinum Critical Tertiary

Comments on the commodity information

  • OLD MRDS (WEEKS) DISTRICT RECORD INDICATED PRESENCE OF AG ALSO

Materials information

Materials Type of material
Gold Ore

Analytical data

Result CONCENTRATE YIELDED $29.76/TON AU (2.977 OZ/TON, 100 PPM), $19.80/TON PT (0.210 OZ/TON, 7.2 PPM), CONCENTRATION NOT KNOWN

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
    Stratigraphic age (youngest) Pliocene

Nearby scientific data

(1) -120.98354, 39.68905
ListMap

Economic information

Ore body information

  • General form STREAM SEDIMENT DEPOSITS
    Thickness 152.4M
    Width 457.2M

Controls for ore emplacement

  • Stream Hydraulics

Comments on the geologic information

  • AMPHIBOLITE BEDROCK. DEPOSIT IS WITHIN TERTIARY GRAVELS OF OLD YUBA RIVER DRAINAGE

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Year of first production 1848

Mining district

District name La Porte District

Land status

Ownership category National Forest

Comments on the production information

  • IN ITS HEYDAY, THE LOWER GRAVELS YIELDED 0.1-1 OZ/YD

Comments on the workings information

  • DRIFT MINING, HYDRAULIC 1850'S-1880'S

Comments on development

  • INTERMITTENTLY ACTIVE UNTIL AFTER DEPRESSION

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit MOST OF GOLD NEAR BEDROCK
Deposit RECORD W017603 HAS BEEN MERGED AND DELETED. SEE ALSO: MRDS W025377.

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.

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.