The Dewey's is a mercury mine located in Sonoma county, California.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Dewey's MRDS details
Site Name
Primary: Dewey's
Secondary: Dewey
Secondary: Big Red
Secondary: Eagle Rock
Commodity
Primary: Mercury
Location
State: California
County: Sonoma
District: West Mayacmas
Land Status
Not available
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: Geysers Development Co.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1940
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges
Mineral Deposit Model
Not available
Orebody
Form: LENSES
Structure
Type: L
Description: Serpentine - Sandstone Contact
Alterations
Alteration Type: L
Alteration Text: Silica Carbonate Alteration Of Serpentine
Rocks
Name: Serpentinite
Role: Host
Age Type: Host Rock
Age Young: Late Jurassic
Analytical Data
Not available
Materials
Ore: Cinnabar
Ore: Mercury
Comments
Not available
References
Reference (Deposit): HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252
Reference (Deposit): BAILEY, E. H., USGS, PERSONAL FILES
Reference (Deposit): HONKE, M. T., JR. AND VER PLANCK, W. E., JR., 1950, MINES AND MINERAL RESOURCES OF SONOMA, COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 46, P. 98 - 105
Reference (Deposit): BAILEY, E. H., 1946, QUICKSILVER DEPOSITS OF THE WESTERN MAYACMAS DISTRICT, SONOMA COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 42, P. 199 - 230
Reference (Production): USBM DATA
California Gold
"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.
