Geology, Mahony Lake (southwest), Northwest Territories / [by] K.M. Fallas, B.C. MacLean, and T. Hadlari.: M183-1/91-2012E-PDF

"The southwest quadrant of the Mahony Lake map area (NTS 96-F) lies within the Franklin Mountains, Northwest Territories and features relatively flat, low-lying plains around Brackett and Mahony lakes, as well as prominent ridges such as the Norman Range. The area is well vegetated, with bedrock exposure more common on the high ridges or along stream banks. Cordilleran deformation from the southwest has uplifted Paleozoic strata, dominated by carbonate, along reverse or thrust faults, and anticlinal folds. Cambrian evaporitic strata of the Saline River Formation in the hanging walls of some faults, and the cores of anticlines, indicates this unit is likely a local detachment layer for faulting and folding. Cretaceous to Paleocene siliciclastic strata are preserved in the intervening synclinal features, particularly south of Brackett Lake. A paleotopographically high feature known as the Keele Arch can be identified through the central part of the map area where Ordovician to Devonian strata are generally absent beneath the sub-Cretaceous unconformity. Public-domain seismic-reflection profiles, archived with the National Energy Board, reveal the presence of numerous folds with associated faults hidden beneath unconsolidated Quaternary deposits south of Brackett Lake. Exploration by petroleum companies in the area targets potential reservoirs in buried Cambrian or Devonian strata"--Abstract.

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