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Calpella

Occurrence in Mendocino county in California, United States with commodities Gold, Platinum, Iridium, Osmium
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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. Mineral occurrence model 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. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10038055
MRDS ID M045325
Record type Site
Current site name Calpella
Related records 10285834, 10116174

Geographic coordinates

Geographic coordinates: -123.21137, 39.22237 (WGS84)
Elevation 267
Location accuracy 1000(meters)
Relative position ABOUT 1 MI SOUTH OF CALPELLA, Est Imated, Est Imated

Site location context

Political divisions (FIPS codes)

Mendocino(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ukiah(quadrangle 1:24,000 scale)

Ukiah(quadrangle 1:100,000 scale)

Ukiah(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Russian(hydrologic unit)

Northern California Coastal(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Mendocino

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 016N 012W 20 SE4 California

Comments on the location information

  • PARTLY UNSURVEYED. LOCATION SHOWN IS ABOUT 0.5 MI UPSTREAM FROM MOUTH OF GULCH AT RUSSIAN RIVER. DEPOSIT IS PROBABLY IN HILLS THROUGH WHICH THIS STREAM DRAINS BASED ON DESCRIPTIONS IN LOGAN. INFO FROM LAND.ST :01?

Commodities

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

Analytical data

Result ANALYSIS OF OSMIRIDIUM GRAIN YIELDED 49% IR, 32% OS, 10% PT. ONE PAN SHOWED 2 OZ PT
Result ANOTHER 190 GR AU AND 160 GR PT.

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

Nearby scientific data

(1) -123.21137, 39.22237
ListMap

Economic information

Ore body information

  • General form TERRACE

Controls for ore emplacement

  • Stream Hydraulics

Comments on the geologic information

  • MODERN PLACER DEPOSITS ARE IN GULCH EMPTYING EASTWARD INTO RIVER FROM GRAVEL HILLS SOUTH OF CALPELLA

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Comments on the production information

  • SPENCER FOUND NO PGE BUT CONFIRMED PRODUCTION OF SEVERAL MILLIGRAMS.

Comments on the workings information

  • HAND MINING

Reference information

Bibliographic references

  • Deposit

    LOGAN, C.A., 1919, PLATINUM AND ALLIED METALS IN CALIFORNIA: CALIFORNIA STATE MINING BUREAU BULLETIN 85, P. 46-47.

  • Deposit

    SPENCER, C.H., JR., 1971, STATISTICAL CORRELATION OF PLATINUM METALS WITH HEAVY MINERALS IN STREAM SEDIMENTS OF THE KLAMATH MOUNTAINS, CALIFORNIA: SAN JOSE, CALIFORNIA STATE UNIVERSITY, M.S. THESIS, P. 32.

General comments

Subject category Comment text
Deposit DEPOSIT IS SAID TO BE A DOWNSTREAM EQUIVALENT OF MENDOCINO MINING AND MILLING PROPERTY (M045326), EMPLACED DURING A TIME WHEN THE ANCESTRAL RUSSIAN RIVER FLOWED NORTH
Deposit RECORD M010033 HAS BEEN MERGED AND DELETED. SEE ALSO: MRDS M045326.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-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.