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Antone Nichelini

Producer in Napa county in California, United States with commodities Chromium, Platinum, Palladium, Iridium, Ruthenium, Rhodium
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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. Land status
  15. Ownership information
  16. Production statistics
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10109892
MRDS ID MP00069
Record type Site
Current site name Antone Nichelini
Alternate or previous names Nichelini Mine

Geographic coordinates

Geographic coordinates: -122.30662, 38.50072 (WGS84)
Elevation 448
Relative position ABOUT 8 MI SOUTH OF MOUTH OF POPE CREEK AT LAKE BERRYESSA

Site location context

Political divisions (FIPS codes)

Napa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chiles Valley(quadrangle 1:24,000 scale)

Healdsburg(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Pablo Bay(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Napa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 008N 004W 33,34 California

Comments on the location information

  • NO MINE SHOWN ON TOPO MAP; LOCATION GIVEN IS FOR PGE SAMPLE SITE LOCATION

Commodities

Commodity Importance
Chromium Critical Primary
Platinum Critical Tertiary
Palladium Critical Tertiary
Iridium Critical Tertiary
Ruthenium Critical Tertiary
Rhodium Critical Tertiary

Materials information

Materials Type of material
Chromite Ore
Olivine Gangue

Analytical data

Result 1 PGE ANALYSIS: PT=18 PPB
Result PD=21 PPB
Result IR=48 PPB
Result RU=200 PPB
Result RH=5 PPB

Mineral occurrence model information

Model code 15
USGS model code 8a
Deposit model name Podiform chromite (minor)
Mark3 model number none

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite
    Rock unit name Coast Ranges Ophiolite
    Rock description Coast Ranges Ophiolite
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite

Nearby scientific data

(1) -122.30662, 38.50072
ListMap

Economic information

Ore body information

  • General form LENSES
    Plunge 25-30
    Plunge direction NE

Controls for ore emplacement

  • Magmatic Segregation

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Nichelini, A.
    First year 1918

Production statistics

  • Year 1918
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^45% Cr2o3 Ave
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Cr2O3 Ore Chromium Chromium 45wt-pct

Comments on the production information

  • THE MAIN ORE BODY YIELDED 2,000 TONS IN THE EARLY DAYS OF MINING THE PROPERTY BUT WAS MINED OUT. SMALLER LENSES CONTAINED FROM 5 TO 40 TONS

Comments on the workings information

  • TUNNEL

Reference information

Bibliographic references

  • Deposit

    DOW, D.H., AND THAYER, T.P., 1946, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 134, PT. 2, CH. 1, P. 24.

  • Deposit

    CARLSON, C.A., AND OTHERS, 1985, ANALYSES FOR PLATINUM-GROUP ELEMENTS IN SAMPLES FROM PODIFORM CHROMITE DEPOSITS, CALIFORNIA AND OREGON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 85-442, 14 P.

General comments

Subject category Comment text
Deposit RECORD M010707 HAS BEEN MERGED AND DELETED.
Deposit ORE DEPOSIT MADE UP OF A SERIES OF LENSES

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1990 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.