Mine detail: Great Western

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Location:	Lake County, California, United States, North America
Lat / long:	38.69182, -122.6319
dep_id:	10040805
mrds_id:	M055680
Commodity type:	metallic
Major mineral:	Mercury
Minor mineral:	Chromium
Operation type:	Unknown
Production size:	Medium ammount of material produced
Development status:	Producer
ore:	Cinnabar
gangue:	Calcite, Dolomite, Opal, Pyrite, Quartz
orebody_fm:	PIPES
work_type:	Surface/Underground
alteration:	Silica Carbonate Alteration Of Serpentine, Kaolinized Sediments
conc_proc:	Hydrothermal Solutions
ore_ctrl:	Contacts, Brecciated Zones
Reporter:	Peterson, Jocelyn A.
hrock_unit:	Franciscan Complex
hrock_type:	Serpentinite,Chert
arock_type:	Gabbro
Structure:	Mayacmas Anticline Trending Nw, Lithologic Contacts
tectonic:	Franciscan Melange
Year first produced:	1873
References:	Deposit:: HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252 Deposit:: BAILEY, E. H., USGS, PERSONAL FILES 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. 12, P. 231 - 286 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: CALIF. STATE MINING BUREAU BULL. 78, 389 P. Deposit:: 6) AVERILL, C.V., 1947, MINES AND MINERAL RESOURCES OF LAKE COUNTY, CALIF.: CJMG, V. 43, P. 15-38 Deposit:: 1960 DIREXPL UNIVERSAL SILVER Production:: USBM DATA