Mine detail: Great Eastern and Mount Jackson

Previously called 'Sonoma Quicksilver Mines'

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Location

Lat / long:

38.54405, -122.98136

Resource(M)

Primary:	Mercury
Tertiary:	Chromium
Ore:	Chromite, Cinnabar
Gangue:	Calcite, Chalcedony, Dolomite, Limonite, Magnetite, Opal, Pyrite, Quartz
Orebody form:	PIPES, TABULAR
Discovery year:	1872

Production

Operation type:	Unknown
Production size:	Medium
Development status:	Producer
Production years:	1875-1908, 1914-1919, 1937-1938, 1940-1949
First production started:	1875

Geology

Host rock:	Upper Jur Franciscan, Sandstone, Shale, Chert, Greenstone, Serpentine
Host type:	Serpentinite,Sandstone
Structure:	Wnw Trending Fault Zone, N And E Trending High Angle Faults, Other Fault Sets Striking Nw And Ne.
Tectonic:	Franciscan Melange
Alteration processes:	Silica Carbonate Alteration Of Serpentine

References

MRDS	M055728
DEP	10040853
Reference	{Deposit:: MYERS, W. B. AND EVERHART, D. L., 1948, QUICKSILVER DEPOSITS OF THE GUERNEVILLE DISTRICT, SONOMA COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 44, P. 253 - 277}{Deposit:: HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252}{Deposit:: BAILEY, E. H., USGS, PERSONAL FILES}{Deposit:: RANSOME, A. L. AND KELLOGG, J. L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 35, P. 353 - 486}{Deposit:: 5) BRADLEY, W.W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG BULL. 78, 389 P.}{Deposit:: 6) 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:: 1956 DIREXPL DMEA EXPLORED GEOLOGICALLY FAVORABLE STRUCTURES AND FOUND SIGNIFICANT AMOUNT OF OR}{Production:: USBM DATA}
Reporter	Peterson, Jocelyn A.