Terrestrial Heat Flow in the St. Lawrence Lowland of Quebec
V. A. SAULL ; T. H. CLARK ; R. P. DOIG ; R. B. BUTLER
Terrestrial heat flow has been determined for four boreholes in the Montreal area. The mean value of the results (uncorrected for glacial effects) is 0.790 ± 0.053 x 10-6 cal/ cm2/sec (95 per cent confidence limits). Thermal gradients were determined using a thermistor probe and d-c bridge, and also by a new method using a probe-contained phase-shift oscillator, the output frequency of the oscillator being a function of probe temperature. Thermal conductivity determinations were made on core from the boreholes, using a divided bar apparatus.
Boreholes, boreholes, heat flow, phase-shift oscillator, thermal conductivity, thermistor, Cables, CORE, flow, Heat, Montreal, Quebec, Temperature, Thermal conductivity