Temperature Gradients in the Canadian Shield

TEMPERATURE gradients have been determined for numerous locations in the Canadian Shield in connection with mining operations (1, 2, 12, 13, 14, 15). As part of a programme of geophysical studies of this region, some of these gradients were re-determined by the writer at locations where other thermal properties, specific heat, thermal conductivity, radioactivity, etc., were also to be measured. The ultimate object was to determine the heat flow to the surface at these locations.
Keywords: Canadian Shield, isothermal, Kirkland Lake, mercury-in-glass thermometer, thermometers, Mine, Mines, Montreal, Resistance, Rock, Rocks, Temperature, Value
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