Mine detail: Mount Diablo Mine

Previously called 'RyneBagley Creek'

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Location

Lat / long:

37.90157, -121.8791

Resource(M)

Primary:	Mercury
Ore:	Cinnabar, Metacinnabar
Gangue:	Calcite, Chalcedony, Chromite, Dolomite, Marcasite, Opal, Pyrite, Quartz, Stibnite
Orebody form:	IRREGULAR, TABULAR
Discovery year:	1863

Production

Operation type:	Unknown
Production size:	Medium
Development status:	Past Producer
First production started:	1875

Geology

Host rock:	Franciscan Complex
Host type:	Serpentinite
Associated type:	Rhyolite
Alteration processes:	Silica Carbonate Alteration Of Serpentine

References

MRDS	M055494
DEP	10040642
Reference	{Deposit:: BAILEY, E. H., USGS, PERSONAL FILES.}{Deposit:: HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252.}{Deposit:: ROSS, C. P., 1940, QUICKSILVER DEPOSITS OF THE MOUNT DIABLO DISTRICT, CONTRA COSTA COUNTY, CALIFORNIA: USGS BULL. 922 - B.}{Deposit:: DAVIS, F.F. AND GOLDMAN, H.B., 1958, MINES AND MINERAL RESOURCES OF CONTRA COSTA COUNTY, CALIFORNIA: CJMG V. 54, P. 530-535}{Deposit:: 1955 DIREXPL DMEA UNSUCCESSFUL IN DISCOVERING NEW OR}{Production:: USBM DATA}
Reporter	Gassaway, J. S.