| Title | The ups and downs of the Canadian Shield: 2- preliminary results of apatite fission-track analysis from a 3.6 km vertical profile, LaRonde mine, Quebec |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Pinet, N |
| Source | Geological Survey of Canada, Open File 8385, 2018, 43 pages, https://doi.org/10.4095/308067  Open Access |
| Image |  |
| Year | 2018 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is related to the following
publications |
| File format | pdf |
| Province | Quebec; Ontario |
| NTS | 21E; 21K; 21L; 21M; 21N; 21O; 22B; 22C; 22D; 22E; 22F; 22G; 22H; 22J; 22K; 22L; 22M; 22N; 30N; 31; 32; 33A; 33B; 33C; 33D; 33E; 41; 42; 43A; 43B; 43C; 43D; 43F; 43G; 43H; 52A; 52B |
| Area | Cadillac |
| Lat/Long WENS | -90.0000 -65.0000 54.0000 42.0000 |
| Subjects | stratigraphy; regional geology; geochronology; thermal history; geological history; ground temperatures; thermal analyses; apatite; fission tracks; fission-track dates; bedrock geology; lithology;
sedimentary rocks; greywackes; modelling; erosion rates; Archean; Canadian Shield; Abitibi Greenstone Belt; LaRonde Mine; Cadillac Group; Laurentia; elevations; Phanerozoic; Mesozoic; Paleozoic; Precambrian |
| Illustrations | location maps; geoscientific sketch maps; photographs; tables; histograms; graphs; plots; models |
| Program | GEM2: Geo-mapping for Energy and Minerals Hudson/Ungava Hydrocarbon source rocks |
| Released | 2018 03 26 |
| Abstract | The low-temperature (120-60°C) thermal history of eight samples from a 3.6 km vertical depth profile in the LaRonde Mine (Archean Abitibi greenstone belt, Quebec) has been investigated using apatite
fission-track (AFT) analysis. All samples correspond to greywackes of the Cadillac Formation.
The AFT ages show a clear younging relationship with depth (increasing temperature), as expected for samples that maintained constant relative depths
over time. Ages vary from 413 ± 51 Ma near the surface, to 148.5 ± 6.3 Ma for the deepest sample. Forward and inverse modeling indicate that a scenario with a constant temperature or minor heating during the Paleozoic better accounts for the fission
track length distributions than a scenario with a constant cooling rate. These results support the possibility that the Abitibi region was covered by a sedimentary succession of moderate thickness during the Paleozoic. |
| Summary | (Plain Language Summary, not published)
The aim of the open file is use a low-temperature geochronology method to test the hypothesis that the Abitibi region was once covered by Phanerozoic
rock (less than 542 millions years), that may have been eroded subsequently. Interpretation of this new dataset indicate that the hypothesis is viable, even if not totally demonstrated. |
| GEOSCAN ID | 308067 |
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