Mine detail: Rianda

Previously called 'Half Dome'

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Location: Santa Clara County, California, United States, North America
Lat / long: 37.05381, -121.5238
dep_id: 10040760
mrds_id: M055627
Commodity type: metallic
Major mineral: Mercury
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Cinnabar
gangue: Chalcopyrite, Marcasite, Pyrite
orebody_fm: TABULAR
work_type: Underground
alteration: Silica Carbonate Alteration Of Serpentine
conc_proc: Hydrothermal Solutions Causing Replacement
ore_ctrl: Altered Serpentine, Contact
Reporter: Peterson, Jocelyn A.
Structure: Serpentine - Sandstone Contact, Hayward Fault
prod_yrs: 1942 - 1944
References:
  • 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
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