The Twin Peaks is a mercury mine located in Napa county, California at an elevation of 1,801 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: 1,801 Feet (549 Meters)
Commodity: Mercury
Lat, Long: 38.6625, -122.53389
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.
Twin Peaks MRDS details
Site Name
Primary: Twin Peaks
Commodity
Primary: Mercury
Tertiary: Chromium
Location
State: California
County: Napa
District: East Mayacmas
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Louis D. Fay
Production
Year: 1962
Time Period: To 1962
Material type: HG
Description: Cp_Grade: ^4-10 Lb/Ton
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1902
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: 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: Chromite
Gangue: Saponite
Comments
Comment (Workings): NO WORK SINCE 1943, WORKINGS LARGELY INACCESSIBLE
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): YATES, R. G. AND HILPERT, L. S., 1946, QUICKSILVER DEPOSITS OF THE EASTERN MAYACMAS DISTRICT, LAKE AND NAPA COUNTIES, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 42, P. 231 - 286
Reference (Deposit): BRADLEY, W.W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG BULL. 78, 389 P.
Reference (Deposit): 5) DAVIS, F.F., 1948, MINES AND MINERAL RESOURCES OF NAPA COUNTY, CALIF.: CJMG, V. 44, P. 176-183
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.
