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TitleUpdated post-glacial marine limits along western Hudson Bay, central mainland Nunavut and northern Manitoba
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorMcMartin, IORCID logo; Gauthier, M S; Page, A V
SourceGeological Survey of Canada, Open File 8921, 2022, 19 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediadigital; on-line
RelatedNRCan photo(s) in this publication
File formatreadme
File formatpdf; rtf; mxd; docx
ProvinceManitoba; Nunavut
NTS66O; 66P; 66J; 66I; 66G; 66H; 66B; 66A; 65O; 65P; 65J; 65I; 65G; 65H; 65B; 65A; 64O; 64P; 64J; 64I; 56M; 56N; 56O; 56P; 56L; 56K; 56J; 56I; 56E; 56F; 56G; 56H; 56D; 56C; 56B; 56A; 55M; 55N; 55O; 55P; 55L; 55K; 55J; 55E; 55F; 55D; 55C; 54M; 54N; 54L; 54K; 46M; 46L; 46K; 46E; 46D
Area065J055; Hudson Bay; Churchill; Queen Maud Gulf
Lat/Long WENS-100.0000 -85.5000 68.0000 58.0000
Subjectsmarine geology; Science and Technology; Nature and Environment; postglacial deposits; digital terrain modelling; mapping techniques; marine sediments
Illustrationslocation maps; photographs; satellite imagery; diagrams
ProgramGEM-GeoNorth: Geo-mapping for Energy and Minerals GEM Program Coordination
Released2022 10 27
AbstractA digital compilation of updated postglacial marine limits was completed in the coastal regions of central mainland Nunavut and northern Manitoba between Churchill and Queen Maud Gulf. The compilation builds on and updates previous mapping of the marine limits at an unprecedented scale, making use of high-resolution digital elevation models, new field-based observations of the marine limit and digital compilations of supporting datasets (i.e. marine deltas and marine sediments). The updated mapping also permits a first-hand, knowledgedriven interpolation of a continuous limit of marine inundation linking the Tyrrell Sea to Arctic Ocean seawaters. The publication includes a detailed description of the mapping methods, a preliminary interpretation of the results, and a GIS scalable layout map for easy access to the various layers. These datasets and outputs provide robust constraints to reconstruct the patterns of ice retreat and for glacio-isostatic rebound models, important for the estimation of relative sea level changes and impacts on the construction of nearshore sea-transport infrastructures. They can also be used to evaluate the maximum extent of marine sediments and associated permafrost conditions that can affect land-based infrastructures, and potential secondary processes related to marine action in the surficial environment and, therefore, can enhance the interpretation of geochemical anomalies in glacial drift exploration methods. A generalized map of the maximum limit of postglacial marine inundation produced for map representation and readability also constitutes an accessible output relevant to Northerners and other users of geoscience data.
Summary(Plain Language Summary, not published)
This publication releases a compilation of the postglacial limit of marine transgression along the coastal regions of northern Manitoba and central mainland Nunavut. The compilation is based on field observations and measurements, computer-based mapping using high-resolution digital elevation models and integration with previous mapping of marine features. The work was completed as part of Natural Resources Canada's GEM-GeoNorth Program in collaboration with the Manitoba Geological Survey. The report provides digital datasets and accessible outputs for northerners, a detailed description of the mapping methods as well as a preliminary interpretation of the results. The results can inform land-use planning and coastal evolution research for terrestrial and sea-transport infrastructures, and help in understanding the marine action on the composition of surficial sediments, contributing to efficiency in glacial drift exploration methods.

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