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  3. Mineral Resource Data System (MRDS)

Black Oak

Past Producer in Sonoma county in California, United States with commodity Mercury
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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. Geologic structures
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10040821
MRDS ID M055696
Record type Site
Current site name Black Oak
Related records 10287524

Geographic coordinates

Geographic coordinates: -122.83302, 38.83099 (WGS84)
Elevation 762
Relative position 15 MI E OF CLOVERDALE

Site location context

Political divisions (FIPS codes)

Sonoma(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

The Geysers(quadrangle 1:24,000 scale)

Healdsburg(quadrangle 1:100,000 scale)

Santa Rosa(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 Sonoma

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 011N 009W 02 California

Comments on the location information

  • LOCATION APPROXIMATE

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore

Analytical data

Result TWO ASSAYS YIELDED 1.0 & 1.6 LB/TON

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic)
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert

Nearby scientific data

(1) -122.83302, 38.83099
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Fractures In Chert

Controls for ore emplacement

  • Fault Gouge

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1940
Discoverer Ralph E. Thompson

Mining district

District name West Mayacmas

Ownership information

  • Type Owner
    Owner Ralph Thompson
    First year 1944

Comments on the production information

  • MAY HAVE PRODUCED 5 FL

Comments on the reserve resource information

  • NO MEASURED RESERVES

Comments on the workings information

  • WORKINGS NOW CAVED

Comments on development

  • DMEA CONTRACT RECOMMENDED DENIED BECAUSE OF LOW RESERVES

Reference information

Bibliographic references

  • Deposit

    HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252

  • Deposit

    BAILEY, E. H., USGS, PERSONAL FILES

  • Production

    HOLMES, 1965

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1976 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.