Abstract
Data from eleven petroleum exploration wells along a south‐north profile in the Sverdrup Basin of the Canadian Arctic Islands indicate large variations in temperature gradients(18 ± 2 to 39 ± 2 mK/m) and heat‐flow values [Formula: see text]. High values occur near the axis of the basin and values decrease systematically toward the southern and northern flanks of the basin. The basin axis in this area is the zone of maximum crustal attenuation and Lower Cretaceous dike and sill intrusion, but any thermal anomaly associated with these events will have dissipated by now. The present heat‐flow pattern is likely the result of thermal refraction or fluid flow in the basin.
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