The Black Oak is a mercury mine located in Sonoma county, California at an elevation of 2,500 feet.
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
Elevation: 2,500 Feet (762 Meters)
Commodity: Mercury
Lat, Long: 38.83111, -122.83194
Map: View on Google Maps
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.
Black Oak MRDS details
Site Name
Primary: Black Oak
Commodity
Primary: Mercury
Location
State: California
County: Sonoma
District: West Mayacmas
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Ralph Thompson
Years: 1944 -
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
Not available
Structure
Type: L
Description: Fractures In Chert
Alterations
Not available
Rocks
Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Host Rock
Age Young: Late Jurassic
Analytical Data
Analytical Data: TWO ASSAYS YIELDED 1.0 & 1.6 LB/TON
Materials
Ore: Cinnabar
Comments
Comment (Location): LOCATION APPROXIMATE
Comment (Reserve-Resource): NO MEASURED RESERVES
Comment (Production): MAY HAVE PRODUCED 5 FL
Comment (Development): DMEA CONTRACT RECOMMENDED DENIED BECAUSE OF LOW RESERVES
Comment (Workings): WORKINGS NOW CAVED
References
Reference (Deposit): HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252
Reference (Deposit): BAILEY, E. H., USGS, PERSONAL FILES
Reference (Production): HOLMES, 1965
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.
