00000nam 2200000zi 4500 9.934488 CaOODSP 20251031142449 m o d f cr cn||||||||| 240226t20242024oncdab ob f000 0 eng d 9780660704838 CaOODSP eng rda CaOODSP n-cn-nu M183-2/9170E-PDF Oldenborger, G. A. (Greg A.) author. Time-domain electromagnetic soundings for talik investigations, Rankin Inlet, Nunavut / G.A. Oldenborger. [Ottawa] : Geological Survey of Canada, 2024. ©2024 1 online resource (ii, 113 pages) : charts, illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Open file, 2816-7155 ; 9170 Includes bibliographical references (pages 11-13). "Knowledge of the occurrence of taliks or unfrozen ground beneath lakes in permafrost terrain is critical for understanding the interaction between surface and groundwater. Due to the contrast in electrical properties between frozen and unfrozen ground, time-domain electromagnetic (TEM) surveys may be useful for talik detection and mapping. TEM soundings were acquired over nine lakes in the vicinity of Rankin Inlet, Nunavut for talik studies. Soundings were also acquired over shallow lake terraces and onshore. One-dimensional modelling and inversion of the data show marked variability in the data and the recovered resistivity models between lakes of different sizes and different bedrock geology"--Summary. Permafrost Nunavut Rankin Inlet. Electromagnetic testing Nunavut Rankin Inlet. Pergélisols Nunavut Rankin Inlet. Essais électromagnétiques Nunavut Rankin Inlet. Geological Survey of Canada, issuing body. Open file (Geological Survey of Canada) 2816-7155 ; 9170. (CaOODSP)9.506878 PDF 41.02 MB https://publications.gc.ca/collections/collection_2024/rncan-nrcan/m183-2/M183-2-9170-eng.pdf