Geothermal Exploration at Mt. Cayley -- A Quaternary Volcano in Southwestern British Columbia
- Key words
- Exploration; General; Canada; British Columbia; Mt. Cayley; K-Ar; Volcanics; Magnetotelluric; KGRA; Mapping; Geology; Thermal Waters; Geothermometry; Low Temperature; Electrical Conductivity; Temperature Gradient; Surface Waters; Resource Assessment; Dome
- Location
- British Columbia; Mt. Cayley, Canada
- Conference
- Geothermal Resources Council Transactions
- Year
- 1984
- Session
- Exploration; Geological surveys; Geochemical surveys; Geophy
- Language
- English
Abstract
Mt. Cayley is a deeply dissected multiple plug dome in the central Garibaldi Belt, 125 kilometers north of Vancouver B.C. Potassium argon dates from the central edifice range from 5.7 to 0.6 Ma whereas peripheral domes give dates as young as 0.11 Ma. The base of the complex and underlying crystalline basement rocks have undergone intense hydrothermal alteration in a zone that contains warm seeps of high C1 - SO4 water. Resistivity and magnetotelluric surveys have defined a conductive anomaly (<100 m) beneath the altered zone and diamond drilling has confirmed thermal gradients as high as 105°C/km. Following work by the Geological Survey of Canada beginning in 1979 the area was designated by the Provincial Government as a KGRA and in 1983 O'Brien Resources acquired and began exploration of parcel G3 which included the principal anomaly.
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