Mine detail: Esperanza

Previously called 'Bright Hope'

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Location: Sonoma County, California, United States, North America
Lat / long: 38.80599, -122.8433
dep_id: 10040829
mrds_id: M055704
Commodity type: metallic
Major mineral: Mercury
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Producer
ore: Cinnabar, Mercury
gangue: Quartz
work_type: Underground
alteration: Silica Carbonate Alteration Of Serpentine
conc_proc: Hydrothermal Solution
ore_ctrl: Contact And Local Faulting
Reporter: Peterson, Jocelyn A.
hrock_type: Serpentinite
Structure: Serpentine - Sandstone Contact
dy_ba: <
disc_yr: 1917
prod_yrs: 1917 - 1918, 1931 - 1936, 1938, 1940 - 1941, 1947
References:
  • Deposit:: HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252
  • Deposit:: BAILEY, E. H., USGS, PERSONAL FILES
  • Deposit:: BAILEY, E. H., 1946, QUICKSILVER DEPOSITS OF THE WESTERN MAYACMAS DISTRICT, SONOMA COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 42, P. 199 - 230
  • Deposit:: BRADLEY, W. W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CALIF. STATE MIN. BUREAU BULL. 78, 389 P.
  • Deposit:: 5) HONKE, M.T., JR. AND VER PLANCK, W.E., JR., 1950, MINES AND MINERAL RESOURCES OF SONOMA COUNTY, CALIF.: CJMG, V. 46, P. 98-105
  • Deposit:: 6) RANSOME, A.L. AND KELLOGG, J.L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG, V. 35, P. 353-486
  • Production:: USBM DATA
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