Electromagnetic surveys for talik investigations, First Landing and Second Landing lakes, Rankin Inlet, Nunavut

As part of a study on lake talik formation, time-domain electromagnetic (TEM) soundings were conducted over First Landing Lake and along a section from First Landing Lake to Second Landing Lake in the vicinity of Rankin Inlet, Nunavut. Survey results show variations in electrical conductivity interpreted to result from both frozen and unfrozen ground, and potential saline permafrost. Second Landing Lake is interpreted to support a talik to 100 m depth or more. First landing Lake exhibits a complicated conductivity structure. Presence of a talik and possible groundwater connectivity between the two lakes is difficult to interpret due to the presence of saline permafrost.