Testing grain size dependent variability of cosmogenic nuclide concentrations for isochron burial dating of fluvial sediment (Pannonian Basin, Hungary)
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Le résumé fourni par la source
In this study a new approach of cosmogenic radionuclide (CRN) isochron burial dating was developed for locations where the maximum clast size of the sediment does not reach the size of using single cobble samples. This modification makes use of the presumption that different grain size fractions have diverse pre-burial histories and thus are deposited with diverse amount of CRNs. Accordingly, a bulk sample is taken at a certain sediment depth, from which several grain size fractions are selected. These are treated as individual samples for isochron burial age determination. To test our hypothesis, a fluvial sediment succession of the Paleo-Danube River in the Western Pannonian Basin, with an assumed Pliocene age was sampled at two sample depths. The different grain size fractions (0.25-0.5; 1-2; 4-8; 10-20; and 40-60 mm; n=7) provided variable 26 Al and 10 Be concentrations, supporting the validity of our assumption. The difference between the lowest and largest concentrations was limited making age determination and outlier identification more challenging compared to an isochron with more variable CRN concentrations. After a careful outlier identification, χ 2 minimisation inverse modelling yielded 3.9 ± 0.7 Ma as the age of fluvial sedimentation. The offered sampling strategy opens a window towards further application of the CRN isochron burial dating. The burial age of fluvial sediments that were hitherto undatable due to their limited thickness and small clast size can be determined. After the presented adjustment of the sampling strategy the age of deposition can be calculated by the standard ways of isochron burial dating.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Testing grain size dependent variability of cosmogenic nuclide concentrations for isochron burial dating of fluvial sediment (Pannonian Basin, Hungary)
- Date Crossref
- 01/12/2025
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Konkoly Observatory pays non établi dans la noticeStructure de recherche
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Institute for Geological and Geochemical Research pays non établi dans la noticeStructure de recherche
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University of Vienna pays non établi dans la noticeUniversité ou école supérieure
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HUN-REN Institute for Nuclear Research pays non établi dans la noticeStructure de recherche
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Eötvös Loránd University pays non établi dans la noticeUniversité ou école supérieure
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HUN-REN Research Centre for Astronomy and Earth Sciences pays non établi dans la noticeStructure de recherche
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HUN-REN Institute of Earth Physics and Space Science pays non établi dans la noticeStructure de recherche
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CSFK pays non établi dans la noticeInstitution
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HUN-REN Institute of Nuclear Research (Atomki) pays non établi dans la noticeStructure de recherche
Konkoly Observatory, Institute for Geological and Geochemical Research et University of Vienna, avec 6 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.