Surficial Geology, Glacial History and Bedrock Investigation in the Dessert Lake Drumlin Field, Northwest Territories



Philippe Normandeau –



P. Normandeau – Northwest Territories Geological Survey, Yellowknife, NT, Canada
G. Lambiv-Dzemua – Northwest Territories Geological Survey, Yellowknife, NT, Canada



Surficial geology mapping and glacial history reconstruction are essential to drift prospecting, and also support infrastructure development, help characterize terrain sensitivity and are a key aspect of interpreting baseline geochemical data. Previous surficial geological work performed by industry and remote mapping by the Geological Survey of Canada in the 85K NTS map sheet respectively identified the Dessert Lake drumlin field, and produced a regional understanding of surficial material distribution. A multi-year initiative from the Northwest Territories Geological Survey builds on this body of work by adding an understanding of the surficial material sampling suitability, establishing the geochemical and indicator mineral background variations in relation to the bedrock, and testing the presence of dispersal patterns associated with geophysical anomalies in the area. The first field season of this project was completed in the summer of 2020. Surficial geology work, including 60 till indicator mineral and geochemistry samples, was performed in concert with the evaluation of the industrial mineral potential for raw materials such as silica sand, gypsum, barite and shale/slate. Accessibility and proximity to infrastructure in this area makes the unassessed industrial mineral potential of high importance.

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