Geothermal gradients and heat flow in the Beaufort-Mackenzie Basin,Arctic Canada |
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| Authors: | F W Jones J A Majorowicz J Dietrich A M Jessop |
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| Institution: | (1) Department of Physics and Institute of Earth and Planetary Physics, University of Alberta, Edmonton, Alberta, Canada, T6G 2J1;(2) Geological Survey of Canada, Institute of Sedimentary and Petroleum Geology, T2L 2A7 Calgary, Alberta, Canada |
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| Abstract: | Thermal gradients have been calculated and heat flow estimates made for 34 petroleum exploration wells along four regional profiles crossing the Mesozoic-Cenozoic Beaufort-Mackenzie Basin of northern Canada. The geothermal gradients vary from 22 mKm–1 to 44 mKm–1. Four sets of possible thermal conductivity values were used to calculate a range of heat flow values for each well. Generally low heat flow is observed in wells within the deeper portions of the basin and higher heat flow values occur in wells along the Aklavik Arch Complex which forms the southeastern margin of the basin.The contribution to heat flow by heat generation below the Mesozoic-Cenozoic basin fill sediments has been considered. The heat flow contribution from sub-Mesozoic sedimentary strata and underlying basement is highest along the basin-bounding Aklavik Arch Complex. The decrease in heat flow from below the basin fill sediments toward the basin depocenter may be related to basinward crustal thinning and corresponding reductions in intra-crustal radiogenic heat production. |
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| Keywords: | Geothermal gradients heat flow Arctic Canada |
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