Commodities
PrimaryMercury
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Orebody formIRREGULAR
Ore controlFault Zone At Lithologic Contact, Points Of Flexure In Faults
Materials
Ore mineralsCinnabar, Mercury, Metacinnabar
GangueOpal, Pyrite
Geology
Host rockSerpentinite,Basalt
Associated rockBasalt
StructureSerpentine - Sandstone Contact
AlterationSilica Carbonate Alteration Of Serpentine, Kaolinization Of Basalt.
Economic & production
Development statusPast Producer
Production years1872, 1876, 1878 - 1881, 1902 - 1905, 1907 - 1924, 1926, 1928 - 1929, 1932 - 1940, 1942 - 1947
Discovery year1871
Identification
Deposit ID10040806
MRDS IDM055681
Alternate namesAmerican, Dead Broke
RegionNA
Data scoreB
Coordinates38.74099, -122.70107
References
HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252BAILEY, E. H., USGS, PERSONAL FILESYATES, 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 - 286AVERILL, C.V., 1947, MINES AND MINERAL RESOURCES OF LAKE COUNTY, CALIF.: CJMG, V. 43, P. 15-385) BRADLEY, W.W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG BULL. 78, 389 P.6) RANSOME, A.L. AND KELLOGG, J.L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG, V. 35, P. 353-5581955 DIREXPL EATON AND SMITH CONTRACTORUSBM DATA