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  3. Mineral Resource Data System (MRDS)

Sonoma Group

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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Production statistics
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10040849
MRDS ID M055724
MAS/MILS ID 60970069
Record type Site
Current site name Sonoma Group
Alternate or previous names Crown Point, Sonoma Consolidated, Old Sonoma, New Sonoma, Snonoma Group Prospect

Geographic coordinates

Point of reference Geographic coordinates: Elevation UTM Precision Relative position Point location
-122.76444, 38.74278 (WGS84) 16 MI NE OF HEALDSBURG
(click for info)
Main Entrance -122.76912, 38.75153 (WGS84) 100 SW of Contact Mine, SE of Crystal Mine. Shown and labeled on pl. 29 of Bailey, 1946.

Site location context

Political divisions (FIPS codes)

Sonoma(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Jimtown(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 010N 008W 5 California

Comments on the location information

  • LOCATED AT CENTER OF SECTION

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Mercury Ore

Alteration

  • (Local) Silica Carbonate Alteration Of Serpentine

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -122.76444, 38.74278
ListMap
Main Entrance (2) -122.76912, 38.75153
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Serpentine - Sandstone Contact

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1873
Production years 1873, 1904, 1916 - 1917, 1939

Mining district

District name West Mayacmas

Ownership information

  • Type Owner
    Owner Peter Pakula
  • Type Owner
    Owner Lee Toland
    Interest 100
    Year 1946

Production statistics

  • Year 1946
    Material 100 flasks between 1873 and 1943.
    Accuracy Estimate

Workings at the site

  • Type of workings Underground
    Length 304.8M

Comments on the workings information

  • WORKINGS LARGELY CAVED

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    BAILEY, E. H., USGS, PERSONAL FILES

  • Deposit

    BAILEY, E. H., 1946, QUICKSILVER DEPOSITS OF THE WESTERN MAYACMAS DISTRICT, SONOMA COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 42, no. 3, p. 199-230, pl. 29.

  • Deposit

    BRADLEY, W.W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG BULL. 78, 389 P.

  • Deposit

    HONKE, M.T., JR. AND VER PLANCK, W.E., JR., 1950, MINES AND MINERAL RESOURCES OF SONOMA COUNTY, CALIF.: CJMG, V. 46, P. 98-105

  • Deposit

    RANSOME, A.L. AND KELLOGG, J.L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG, V. 35, P. 353-486

  • Deposit

    CDMG BASIN PLANNING AREA 1B (197 [copied, but cut off, from deleted record 10214523 (MAS 0060970230).

General comments

Subject category Comment text
General Do not confuse this Sonoma with the more significant Sonoma about 18 miles to the SW, also in Sonoma County.

Reporter information

Type Date Name Affiliation Comment
Reporter 1976-07-01 Peterson, Jocelyn A. U.S. Geological Survey
Editor 2010-11-12 Wilson, Anna B. U.S. Geological Survey merged and deleted duplicate entries10214523 and 10287283.
Reporter 1983-11-04 Western Field Operations Center (WFOC) U.S. Bureau of Mines both MAS records 0060970230 and 0060970069.

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.