Pre-collisional crustal evolution of the European Variscan periphery: Constraints from detrital zircon U–Pb ages and Hf isotopic record in the Precambrian metasedimentary basement of the Brunovistulian Domain

Provenance of the early Palaeozoic volcano-sedimentary successions from eastern part of the Central Sudetes: implications for the tectonic evolution of the NE Bohemian Massif

“…This allows us to propose a new model for the development of the Cambro-Ordovician rocks cropping out in the eastern part of the Fore-Sudetic Block from the early Palaeozoic to the Carboniferous. The model is generally consistent with those proposed for other Late Neoproterozoic and Cambro-Ordovician sequences exposed in the Bohemian Massif (Jastrzębski et al 2017;Hajná et al 2018;Collett et al 2020;Soejono et al 2020;Collett et al 2022;Soejono et al 2022). Our data combined with already published results shed new light on the development of the passive Gondwana margin and the nature of the tectonic suture separating the Central and East Sudetes.…”

“…Furthermore, similar detrital zircon age spectra of the late Neoproterozoic (Ediacaran) and Cambro-Ordovician volcano-sedimentary sequences were recently documented from the Stare Město Belt and the Bunovistulian terrane (sites 6 and 5 on Fig. 14, respectively, Collett et al 2021; Śliwiński et al 2022; Soejono et al 2022). This implies that mentioned Gondwana-derived terranes and Brunovistulia were located within the extended Gondwana shelf at that time and were sourced from the same cratonic area (e.g.…”

“…The presented zircon age spectra demonstrate that the volcano-sedimentary successions of the KMB and DMC are typical of the Gondwana-derived terranes now exposed in the Bohemian Massif and exemplified by the Saxothuringian, Teplá-Barrandian and Moldanubian zones (see Žák & Sláma, 2018). It is worth noting that some volcano-sedimentary successions exposed in the Brunovistulian zone also show similar detrital zircon signature (Soejono et al 2022). However, this domain is characterized by a paucity of magmatic and volcanic rocks of c. 500 Ma that are commonly exposed in the KMB and DMC.…”

“…Turniak et al 2000; Lange et al 2005; Mazur et al 2010; Zieger et al 2018). Neoproterozoic grains could have been derived from granitoid intrusions dated at c. 540 Ma that were reported from several fragments of Cadomian basement exposed in the Bohemian Massif (Linnemann & Heuse, 2001; Tichomirowa et al 2001; Mingram et al 2004; Żelaźniewicz et al 2004; Jastrzębski et al 2021; Tabaud et al 2021; Śliwiński et alet al 2022; Soejono et al 2022). However, several detrital zircons were most probably supplied by volcano-sedimentary successions represented by, for example, the Stronie and Młynowiec formations in the Orlica-Śnieżnik dome (Jastrzębski et al 2010; Mazur et al 2012; Mazur et al 2015), the Zwethau and the Rothstein formations in the Saxohuringian zone (e.g.…”

“…Some authors discussed the presence of the Rheic suture between the Central and East Sudetes (e.g. Mazur et al 2012;Jastrzębski et al 2013;Jastrzębski et al 2015;Oberc-Dziedzic et al 2018;Jastrzębski et al 2020;Śliwiński et al 2022), while others questioned its existence in this fragment of the Variscan belt of Europe (Soejono et al 2010;Collett et al 2021Collett et al , 2022. Unfortunately, this fragment of the Variscan orogen is partly located on the Fore-Sudetic Block, where the metamorphic basement is mostly covered by Cenozoic sediments.…”