Geology, Fort Norman (northwest), Northwest Territories / [by] K.M. Fallas, B.C. MacLean, and T. Proks.: M183-1/92-2012E-PDF

"The northwest quadrant of the Fort Norman map area (NTS 96-C) occupies part of the Mackenzie Plain, Northwest Territories, featuring relatively flat, low-lying plains on either side of the Mackenzie River. Rising out of these plains are the isolated MacKay Range, and the southern termination of the Norman Range, south and west of the Hamlet of Tulita, respectively. Bedrock exposures are typically limited to stream banks in low-lying areas, but are quite abundant at higher elevations. Both the MacKay Range and the Norman Range are underlain by Paleozoic strata, dominated by carbonate, which has been uplifted by folding and contractional faulting. The surrounding plains are underlain by Cretaceous to Paleocene siliciclastic strata. The presence of the Keele Arch, a paleotopographic high, is revealed along the Police Island anticline, where Ordovician and younger strata are absent beneath the unconformity at the base of the Cretaceous. Public-domain seismic-reflection profiles, archived with the National Energy Board, reveal the presence of numerous folds and some faults that lack a topographic expression due to the involvement at surface of easily eroded lithologies, combined with variable thicknesses of overlying, unconsolidated, Quaternary sediment. Exploration by private industry in the area targets both coal seams in the Summit Creek Formation and petroleum in buried Cambrian, Devonian, and Cretaceous strata"--Abstract.

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