Mine detail: Great Western

Previously called ''

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Location

Lat / long: 38.69182, -122.6319

Resource(M)

Primary: Mercury
Secondary: Chromium
Ore: Cinnabar
Gangue: Calcite, Dolomite, Opal, Pyrite, Quartz
Orebody form: PIPES

Production

Operation type: Unknown
Production size: Medium
Development status: Producer
First production started: 1873

Geology

Host rock:Franciscan Complex
Host type:Serpentinite,Chert
Associated type:Gabbro
Structure:Mayacmas Anticline Trending Nw, Lithologic Contacts
Tectonic:Franciscan Melange
Alteration processes:Silica Carbonate Alteration Of Serpentine, Kaolinized Sediments

References

MRDSM055680
DEP10040805
Reference{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}
ReporterPeterson, Jocelyn A.