The Northwest Territories Geological Survey started a new project in collaboration with the University of Calgary. The project aims to study the thermal history of the sedimentary rocks in southwestern Northwest Territories. This area is characterized by high sub-surface temperatures and are therefore of interest for hydrothermal energy exploration. A first set of samples have been collected from sedimentary strata and basement outcrops north of the Great Slave Lake and borehole samples from west of the Great Slave Lake. We will study the thermal history of these samples using multiple low-temperature thermochronology methods.