Record details

    A Late Tournaisian synmetamorphic folding and thrusting event in the eastern Variscan foreland: 40Ar/39Ar evidence from the phyllites of the Wolsztyn-Leszno High, western Poland
Statement of responsibility
    Andrzej Żelaźniewicz, Dirk Marheine, Teresa Oberc-Dziedzic
    Marheine, Dirk
    Oberc-Dziedzic, Teresa
    Żelaźniewicz, Andrzej
Source title - serial
    International journal of Earth sciences (Geologische Rundschau)
    Vol. 92, no. 2
    p. 185-194
    5 obr., 2 fot., 1 tab.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Int. J. Earth Sci. (Geol. Rdsch.)
Classfication no.
Conspectus category
Subject group
    datování Ar/Ar
    vrásnění variské
Geographical name
    Evropa střední
    Polsko - jihozápad
Abstract (in english)
   A Variscan foreland in western Poland comprises two NW-trending basement highs, which are concealed under Carboniferous through Triassic strata of the Fore-Sudetic Monocline (FSM). Both highs consist of multiply deformed quartz-sericite albite chlorite phyllites of unknown protolith age. 40Ar/39Ar laser probe dating of white micas in up to 0.5-mm-thick mica layers, which form the 82 axial-plane foliation in phyllites of the Wolsztyn-Leszno High, yielded an age of 340.1+-2.6 Ma for the lower greenschists facies metamorphism and probably also for the F2 folding. This deformation was associated and followed by thrusting, which brought about the basement highs. The latter delivered clasts to overlying late Visean-early Namurian flysch basin that was mainly sourced from the Saxothuringian Sudetes in which most of the deformation occurred between 345-335 Ma.
   The FSM basement may represent an independent terrane, referred to as the Wielkopolska terrane, belonging to the Armorican Terrane Assemblage
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    7. 4. 2008
Import date
    8. 8. 2012