| Title | High-resolution mapping of glacial landscapes in the north-central portion of the Laurentide Ice Sheet in Nunavut and Northwest Territories |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | McMartin, I ;
Campbell, J E; Godbout, P M; Behnia, P; Tremblay, T;
Normandeau, P X |
| Source | Surficial geology of northern Canada: a summary of Geo-mapping for Energy and Minerals program contributions; by McMartin, I (ed.); Geological Survey of Canada, Bulletin 611, 2023 p. 145-165, https://doi.org/10.4095/331423  Open Access |
| Image |  |
| Year | 2023 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Surficial geology of
northern Canada: a summary of Geo-mapping for Energy and Minerals program contributions |
| File format | readme
|
| File format | pdf |
| Province | Nunavut; Northwest Territories |
| NTS | 55D; 56; 55E; 55F; 55J; 55K; 55L; 55M; 55N; 55O; 65; 75A; 75B; 75G; 75H; 75I; 75J; 75O; 75P; 76A; 76B; 76G; 76H; 76I; 76J; 76O; 76P; 66; 46D; 46E; 46L; 46M |
| Area | Keewatin |
| Lat/Long WENS | -108.0000 -85.0000 68.0000 60.0000 |
| Subjects | surficial geology/geomorphology; mapping techniques; glaciology; glacial history; LANDSAT imagery; LANDSAT; Laurentian Ice-Sheet |
| Illustrations | location maps; tables |
| Program | GEM2: Geo-mapping for Energy and Minerals GEM Program Management |
| Released | 2023 02 16 |
| Abstract | A new glacial geomorphology map covers approximately 415 000 km2 in a core region of the Laurentide Ice Sheet in Nunavut. The compilation builds on recent and legacy maps and is supplemented by visual
digitization of glaciogenic features using high-resolution digital elevation (ArcticDEM) and Landsat 8 images. From this unprecedented, detailed inventory of over 156 000 features and more than 14 000 field observations, various glacial landsystems
are identified, many of which are entirely new and others of which are significantly modified or updated. These include ice streams, palimpsest ice flows, and areas where basal-ice thermal regimes fluctuated between cold-based and warm-based. The GIS
data comprise glacial features mapped at original and generalized scales, standardized field data sets, and interpreted glacial landsystems. These comprehensive georeferenced data sets can be used to reconstruct the glacial history in the interior
portion of the Laurentide Ice Sheet in Nunavut and Northwest Territories and to identify distinct glacial-sediment transport patterns for applications to mineral exploration. |
| Summary | (Plain Language Summary, not published)
A new digital compilation of glacial features and interpreted glacial landsystems was produced for a large area covering ~425,000 km2 in the Keewatin
Sector of the Laurentide Ice Sheet in central mainland Nunavut. The compilation builds on previous surficial geology maps but is significantly improved by the mapping of glacigenic features using recently available high-resolution digital elevation
model (ArcticDEM) and Landsat 8 imagery. The chapter provides an historical review of previous glacial geomorphology mapping in the GEM2 Rae Glacial Synthesis project area, and summarizes the mapping methods and outputs for Sector 1 published in the
Journal of Maps (JoM) open-access release. The work was undertaken to provide new geological knowledge on the history of ice flow events and help understand glacial transport characteristics across major glacial landscapes in northern regions. The
findings will support informed decision making for resource exploration and land use management. |
| GEOSCAN ID | 331423 |
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