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TitleA multikinetic approach to apatite fission-track thermal modelling using elemental data: data and model results for a Permian and Devonian sample from northern Yukon
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorIssler, D RORCID logo; McDannell, K TORCID logo; Lane, L SORCID logo; O'Sullivan, P BORCID logo; Neill, O K
SourceGeological Survey of Canada, Open File 8821, 2021, 158 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediadigital; on-line
File formatreadme
File formatpdf; rtf; xlsx (Microsoft® Excel®)
NTS106E; 106L; 106M; 116F; 116G; 116H; 116I; 116J; 116K; 116N; 116O; 116P
Lat/Long WENS-140.0000 -134.0000 67.5000 65.5000
Subjectsgeochronology; Science and Technology; Nature and Environment; radiometric dating; fission-track dates; apatite; thermal history; thermal analyses; burial history; modelling; exploration wells; electron probe analyses; Eagle Plain; Richardson Anticlinorium; Phanerozoic; Mesozoic; Cretaceous; Jurassic; Triassic; Paleozoic; Permian; Devonian
Illustrationslocation maps; geoscientific sketch maps; plots; time series; tables; bar graphs
ProgramGEM2: Geo-mapping for Energy and Minerals Western Arctic-Beaufort-Northern Yukon
Released2021 09 02
AbstractApatite fission track (AFT) and elemental data are presented for a Permian and Devonian sample from northern Yukon in support of a journal paper (submitted to Geochronology) that discusses multikinetic AFT data interpretation and modelling techniques. The Permian sample is from an exploration well in Eagle Plain and the Devonian sample is from an outcrop to the northeast along the Dempster highway on the western flank of the Richardson Anticlinorium. Both detrital samples contain apatite with overdispersed ages that fail the Chi Square test which suggests each sample has more than one AFT age population. Age mixture modelling software was used to identify multiple AFT age populations that correlate with apatite composition determined using electron microprobe analysis. Single-grain age and length data were sorted into different kinetic populations for each sample using eCl values (effective Cl; derived from the multi-element based rmr0 parameter). Each kinetic population is treated as a separate thermochronometer with its own composition-dependent annealing characteristics that enhances model thermal-history resolution. The multikinetic AFT thermal model, AFTINV, was used to obtain multicycle heating and cooling histories for these samples. Paleozoic and Late Cretaceous-Cenozoic burial/exhumation events are well documented in the study area, but model results suggest that the region experienced an additional phase of Triassic to Early Cretaceous heating and cooling.
Summary(Plain Language Summary, not published)
Apatite fission track (AFT) thermochronology and elemental data are presented along with detailed thermal modelling results for a Permian (295 - 285 Ma) and Devonian (377 - 365 Ma) sample from the northern Yukon. These data are used for an external journal paper that illustrates multikinetic AFT data interpretation and modelling techniques. The new method exploits the variation in detrital apatite mineral chemistry within a rock sample to define separate AFT populations that are sensitive to different parts of its thermal history.

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