| Title | Exhuming the Canadian Shield: preliminary interpretations from low-temperature thermochronology and significance for the sedimentary succession of the Hudson Bay Basin |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | McDannell, K T ;
Pinet, N; Issler, D R |
| Source | Sedimentary basins of northern Canada: contributions to a 1000 Ma geological journey and insight on resource potential; by Lavoie, D (ed.); Dewing, K (ed.); Geological Survey of Canada, Bulletin 609, 2022 p. 287-322, https://doi.org/10.4095/326100
 Open Access |
| Image |  |
| Year | 2022 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Sedimentary basins of
northern Canada: contributions to a 1000 Ma geological journey and insight on resource potential |
| Related | NRCan photo(s) in this publication |
| File format | pdf |
| Province | Nunavut; Manitoba; Ontario; Quebec; Northern offshore region; Saskatchewan; Manitoba; Northwest Territories |
| NTS | 12; 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 |
| Area | Hudson Bay; Hudson Strait; Foxe Basin; Moose River; Southampton Island; Canadian Arctic Islands |
| Lat/Long WENS | -125.0000 -60.0000 78.0000 50.0000 |
| Subjects | regional 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 |
| Illustrations | location maps; geoscientific sketch maps; photographs; schematic cross-sections; plots; models; histograms; bar graphs |
| Program | GEM2: Geo-mapping for Energy and Minerals GEM Synthesis |
| Released | 2022 12 20; 2023 09 14 |
| Abstract | The 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. |
| GEOSCAN ID | 326100 |
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