Mine detail: Rianda

Previously called 'Half Dome'

<< Back to the map

Location

Lat / long:

37.05381, -121.5238

Resource(M)

Primary:	Mercury
Ore:	Cinnabar
Gangue:	Chalcopyrite, Marcasite, Pyrite
Orebody form:	TABULAR

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Production years:	1942 - 1944

Geology

Structure:	Serpentine - Sandstone Contact, Hayward Fault
Alteration processes:	Silica Carbonate Alteration Of Serpentine

References

MRDS	M055627
DEP	10040760
Reference	{Deposit:: HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252}{Deposit:: BAILEY, E. H., USGS, PERSONAL FILES}{Deposit:: AVIS, F.F. AND JENNING, C.W., 1954, MINES AND MINERAL RESOURCES OF SANTA CLARA COUNTY, CALIF.: CJMG, V. 50, P. 342-354}{Production:: USBM DATA}
Reporter	Peterson, Jocelyn A.