Revealing the late Pliocene to Middle Pleistocene alluvial archive in the confluence of the Western Carpathian and Eastern Alpine rivers: 26Al/10Be burial dating from the Danube Basin (Slovakia)

Autor: Klement Fordinál, Michal Šujan, Michal Kováč, Samuel Rybár, Régis Braucher, Milan Sýkora, Juraj Maglay, Katarína Šarinová, Alexander Nagy, Štefan Józsa
Přispěvatelé: Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Sedimentary Geology
Sedimentary Geology, Elsevier, 2018, ⟨10.1016/j.sedgeo.2018.10.001⟩
Sedimentary Geology, 2018, ⟨10.1016/j.sedgeo.2018.10.001⟩
ISSN: 0037-0738
Popis: The Danube Basin, located in the junction of the Eastern Alps and Western Carpathians, comprises up to 600 m thick alluvial succession, which was previously assigned to the Quaternary without geochronological constraints. The internal stratigraphy and timing of the succession remained unknown, although it has potential to provide an important record of geological evolution of the region. The present study involves 26Al/10Be burial dating of 17 samples from wells along with facies correlation from the NW margin towards the basin centre, with the purpose of recovering the Pliocene-Quaternary depositional archive. Obtained ages ranging from 0.58 ± 0.06 to 3.39 ± 2.11 Ma allow for four separate members to be distinguished. The lowermost Kolarovo Fm. with inferred depositional age of ~5–2.6 Ma shows lateral variability with gradual shift of channel fills composed of sands and gravelly sands across the floodplain/pond facies from NW to SE. An abrupt increase of sediment supply:accommodation ratio was observed at ~2.6 Ma, and led to the dominance of amalgamated gravelly channel fills in the centre of the basin. Another sharp increase of sediment supply was observed at ~1.2 Ma, reflected in a brief period of dominance of gravelly channel fill facies across the basin. This highly supplied environment then gradually occupied the whole basin after ~0.9 Ma. Petrographic study implies a distant provenance for the period ~5.0–2.6 Ma. The subsequent interval is characterised by sediment sourcing from uplifting mountains of the Western Carpathians on the margins of the Danube Basin, drained by the Vah River. A notable change appeared after ~0.9 Ma, when the Eastern Alpine provenance of clasts brought by the Danube River prevailed. Based on a review of existing data about regional tectonics and climate, the changes in this depositional record are interpreted as an interplay of climate changes (~2.6 Ma and ~1.2 Ma) and local vertical movements affecting both sediment input and drainage network patterns. The accommodation space was formed without contribution of fault activity according to the observed settings. A noteworthy observation is time transgressive shift of facies boundaries in the Pliocene-Quaternary succession.
Databáze: OpenAIRE
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