Podrobnosti záznamu

    The Ar-Ar ages from the West Sudetes (NE Bohemian Massif): constraints on the Variscan polyphase tectonothermal development
    Kachlík, V.
    Maluski, H.
    Marheine, D.
    Patočka, František
    Zelazniewicz, A.
Typ dokumentu
    část monografie (kapitola)
Zdrojový dokument - monografie
    Palaeozoic Amalgamation of Central Europe
    s. 133-155
    Projekt: IAA3111102, GA AV ČR
    Rozsah: 23 s.
    Výzkumný záměr: CEZ:AV0Z3013912
Předmětová kategorie
    40Ar/39Ar ages
    European Variscides
    tectonothermal development
Klíčové slovo
Abstrakt (anglicky)
   The polyphase Variscan tectonothermal development of the West Sudetes (NE margin of the Bohemian Massif) was precised by 40Ar/39Ar ages. Late Famennian (359 Ma) mica ages from the high-grade Góry Sowie Block suggest continuous uplift after a Late Devonian HT-LP event contemporaneous with the end of subduction-related HP-LT metamorphism in the East Krkonoše Complex. (Mid-)/Late Devonian HP-events in the Krkonoše-Jizera Terrane and Orlica-Sniežnik Dome are followed by coeval HT-events between 345 and 335 Ma (Visean). The latter are interpreted as consequence of uplift, and decompression during overthrusting of both complexes on their forelands. Subsequent small- to large-scale shear movements dated at around 325-320 Ma (early Namurian) affected the West Sudetes and were accompanied by contemporaneous emplacement of the Krkonoše-Jizera pluton. The upper limit of the tectonometamorphic and magmatic activity is dated at 314-312 Ma (Namurian/Westphalian boundary).
   The final juxtaposition of the diversified tectonometamorphic units, which constitute the West Sudetes, took place in early Namurian times.
    AV ČR Brno, Geologický ústav
Kód přispěvatele
    AV ČR, GLÚ
Zdrojový formát
Datum importu
    8. 8. 2012