Mine detail: Helen

Previously called 'AmericanDead Broke'

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Location: Lake County, California, United States, North America
Lat / long: 38.74099, -122.70107
dep_id: 10040806
mrds_id: M055681
Commodity type: metallic
Major mineral: Mercury
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Cinnabar, Mercury, Metacinnabar
gangue: Opal, Pyrite
orebody_fm: IRREGULAR
work_type: Underground
alteration: Silica Carbonate Alteration Of Serpentine, Kaolinization Of Basalt.
conc_proc: Hydrothermal Solutions
ore_ctrl: Fault Zone At Lithologic Contact, Points Of Flexure In Faults
Reporter: Peterson, Jocelyn A.
hrock_type: Serpentinite,Basalt
arock_type: Basalt
Structure: Serpentine - Sandstone Contact
disc_yr: 1871
prod_yrs: 1872, 1876, 1878 - 1881, 1902 - 1905, 1907 - 1924, 1926, 1928 - 1929, 1932 - 1940, 1942 - 1947
References:
  • 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. 42, P. 231 - 286
  • Deposit:: AVERILL, C.V., 1947, MINES AND MINERAL RESOURCES OF LAKE COUNTY, CALIF.: CJMG, V. 43, P. 15-38
  • Deposit:: 5) BRADLEY, W.W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG BULL. 78, 389 P.
  • Deposit:: 6) RANSOME, A.L. AND KELLOGG, J.L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG, V. 35, P. 353-558
  • Deposit:: 1955 DIREXPL EATON AND SMITH CONTRACTOR
  • Production:: USBM DATA
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