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TitleThe 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
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AuthorPinet, N
SourceGeological Survey of Canada, Open File 8385, 2018, 43 pages, https://doi.org/10.4095/308067
Year2018
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is related to Pinet, N; Kohn, B P; Lavoie, D; (2016). The ups and downs of the Canadian Shield: 1- preliminary results of apatite fission track analysis from Hudson Bay region, Geological Survey of Canada, Open File 8110
File formatpdf
ProvinceQuebec; Ontario
NTS21E; 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
AreaCadillac
Lat/Long WENS -90.0000 -65.0000 54.0000 42.0000
Subjectsstratigraphy; 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; outliers; elevations; denudation; Phanerozoic; Mesozoic; Paleozoic; Precambrian
Illustrationslocation maps; geoscientific sketch maps; photographs; tables; histograms; graphs; plots; models
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Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramHudson/Ungava Hydrocarbon source rocks, GEM2: Geo-mapping for Energy and Minerals
Released2018 03 26
AbstractThe 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 ID308067