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Unnamed Prospect

Occurrence in Napa county in California, United States with commodity Chromium
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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. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10043529
MRDS ID M100308
Record type Site
Current site name Unnamed Prospect

Geographic coordinates

Geographic coordinates: -122.34245, 38.80016 (WGS84)
Relative position ASSUMED A SPOT AT CENTER OF SE QUARTER OF SECT. 18

Site location context

Political divisions (FIPS codes)

Napa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Knoxville(quadrangle 1:24,000 scale)

Healdsburg(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Sacramento(hydrologic accounting unit)

Sacramento(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 011N 004W 18 SE California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -122.34245, 38.80016
ListMap

Economic information

Ore body information

  • General form LENSE
    Thickness 1.52M
    Length 3.05M
    Width 2.13M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Knoxville Quicksilver

Land status

Ownership category Private

Comments on the workings information

  • WORKINGS CONSISTED OF SEVERAL SMALL PITS.

Reference information

Bibliographic references

  • Deposit

    DOW, D.H. AND THAYER, T.P., GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIF.: CALIF. DIVISION OF MINES BULLETIN 134, PART 2, CHAPT. 1, P. 23, 34

General comments

Subject category Comment text
Deposit THE SHEAR ZONE THAT CONTAINED THE CHROMITE LENSE HAD A STRIKE OF N55E AND DIPPED 50 SE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1981 Oster, Karel L. (Albers, John P.) 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.