Geoscience and Exploration

Northwest Territories Geological Survey Geophysical Activities, 2018-2019

Wednesday, November 21, 2018 - 12:20 to 15:59 Lobby - Capitol Theatre


A.M. Mirza (Presenting)
Northwest Territories Geological Survey

B.J. Fischer
Northwest Territories Geological Survey

F. Kiss
Geological Survey of Canada

The Northwest Territories Geological Survey (NTGS) holds a large collection of government and industry geophysical data and has the mandate to make these data available to the public. However, while the NTGS’s online data access systems are being upgraded, there is no single place where clients can discover what data exist in this collection. To aid users in finding available geophysical data, all publically available airborne magnetic, electromagnetic, radiometric, and gravity data conducted in the NWT by federal and territorial governments, and industry are represented here on compilation maps, these finding aids will be published as an NTGS Open Report in the near future.

The Banks Island aeromagnetic data submitted and donated by industry is being checked for errors, and enhanced by the addition of new interpretive grids such as vertical derivatives, analytical signal and magnetic susceptibility. Industry-standard geosoft formats are used, and in addition, new and original grids have been converted into georeferenced tiff images for the user’s convenience. Geophysical interpretation of the Banks Island dataset is underway, and will be published as an NTGS Open File.

Areas of interest for new high-quality airborne geophysical projects are proposed for information and discussion. The new airborne geophysical datasets are expected to stimulate private sector activity and investment by providing insight into possible locations of intrusions and fault structures that could be related to mineralization of interest, especially kimberlite.

The Geological Survey of Canada (GSC) completed a fixed wing aeromagnetic reconnaissance in the NWT Mackenzie Mountains, NTS 95M, 105P, 106A and parts of NTS 95N, 96D, 105I, O and 106B, C. The survey is designed with 800 metre line and 2400 metre tie line spacing. The nominal aircraft terrain clearance is 250 metres with drape flying. The results of this project will be published in a joint publication of the NTGS and GSC. Previous to this study, there was no aeromagnetic data available for this area, and these new reconnaissance aeromagnetic data can be used by multiple stakeholders to enhance geoscience knowledge, promote mineral exploration, and inform land use planning decisions.