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TitleExhuming the Canadian Shield: preliminary interpretations from low-temperature thermochronology and significance for the sedimentary succession of the Hudson Bay Basin
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorMcDannell, K TORCID logo; Pinet, N; Issler, D RORCID logo
SourceSedimentary basins of northern Canada: contributions to a 1000 Ma geological journey and insight on resource potential; by Lavoie, DORCID logo (ed.); Dewing, KORCID logo (ed.); Geological Survey of Canada, Bulletin 609, 2022 p. 287-322, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
RelatedThis publication is contained in Sedimentary basins of northern Canada: contributions to a 1000 Ma geological journey and insight on resource potential
RelatedNRCan photo(s) in this publication
File formatpdf
ProvinceNunavut; Manitoba; Ontario; Quebec; Northern offshore region; Saskatchewan; Manitoba; Northwest Territories
NTS12; 13; 14; 15; 16; 22; 23; 24; 25; 26; 27; 28; 29; 32; 33; 34; 35; 36; 37; 38; 39; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 73; 74; 75; 76; 77; 78; 79; 84; 85; 86; 87; 88; 89; 96; 97; 98; 99
AreaHudson Bay; Hudson Strait; Foxe Basin; Moose River; Southampton Island; Canadian Arctic Islands
Lat/Long WENS-125.0000 -60.0000 78.0000 50.0000
Subjectsregional geology; stratigraphy; tectonics; geochronology; geochemistry; Science and Technology; Nature and Environment; sedimentary basins; craton; bedrock geology; structural features; faults; faults, normal; modelling; stratigraphic analyses; tectonic history; burial history; thermal history; temperature; radiometric dating; fission-track dates; mass spectrometer analysis; isotopic studies; fluid inclusions; Canadian Shield; Hudson Platform; Hudson Bay Basin; Bell Arch; Cape Henrietta Maria Arch; Transcontinental Arch; Fraserdale Arch; Keewatin Arch; Severn Arch; Moose River Basin; Methodology; geological contacts; Phanerozoic; Cenozoic; Mesozoic; Paleozoic; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; photographs; schematic cross-sections; plots; models; histograms; bar graphs
ProgramGEM2: Geo-mapping for Energy and Minerals GEM Synthesis
Released2022 12 20; 2023 09 14
AbstractThe geological history of the Canadian Shield is difficult to constrain because the sedimentary record is missing in those areas where Precambrian basement is exposed at the surface. This study presents preliminary results and interpretations of new apatite fission-track (AFT) analyses to elucidate the low-temperature (<120°C) history across Canada. The AFT modelling of samples from Southampton Island, in Nunavut, indicates that maximum temperatures varied between 62°C and 93°C during the Phanerozoic. Maximum burial occurred in the Devonian, but a second phase of Mesozoic burial is proposed, especially in the case for the sample recovered closest to the northern island-bounding normal faults. The AFT modelling of a sample from northern Ontario indicates that a maximum burial temperature of approximately 75°C was reached during the Late Devonian. Overall, these results demonstrate that the Hudson Bay sedimentary succession is the remnant of a more extensive and thicker sedimentary cover than is preserved. This study also provides the opportunity to discuss innovative methodology and modelling approaches for low-temperature thermochronology.
Summary(Plain Language Summary, not published)
This work presents preliminary apatite fission track data and thermal history models for the Hudson Bay region that suggest the Hudson Bay sedimentary succession achieved maximum heating and burial in the Devonian and minor burial later in the Cretaceous. These results imply that the preserved Hudson Bay rocks are an erosional remnant and that the original basin was greater in extent and thickness.

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