Podrobnosti záznamu

Název
    The 40Ar/39Ar ages from the West Sudetes (NE Bohemian Massif): constraints on the Variscan polyphase tectonothermal development
Údaj o odpovědnosti
    Dirk Marheine, Václav Kachlík, Henri Maluski, František Patočka, Andrzej Zelazniewicz
Další názvy
    Palaeozoic Amalgamation of Central Europe (Variant.)
Autor
    Kachlík, Václav
    Maluski, Henri
    Marheine, Dirk
    Patočka, František
    Żelaźniewicz, Andrzej
Jazyk
    anglicky
Zdrojový dokument - seriál
    Geological society special publication
Svazek/č.
    Vol. 201
Strany
    p. 133-155
Rok
    2002
Poznámky
    6 obr., 1 tab., 5 s. bibl.
    il.
    Zkr. název ser.: Geol. Soc. spec. Publ. (London).
Předmětová skupina
    datování Ar/Ar
    devon
    granitoidy
    karbon
    krkonošsko-jizerské krystalinikum
    krkonošsko-jizerský pluton
    lužický pluton
    metamorfika
    metamorfóza vysokotlaká
    orlicko-sněžnické krystalinikum
    slídy
    tektonika polyfázová
    terán
    vrásnění variské
Geografické jméno
    Česká republika
    Polsko - jihozápad
Klíčové slovo
    40Ar/39Ar
    Ages
    Bohemian
    Constraints
    Development
    Massif
    NE
    Polyphase
    Sudetes
    Tectonothermal
    Variscan
    West
Abstrakt (anglicky)
   The West Sudetes (NE margin of the Bohemian Massif) consist of a complex mosaic of several tectonometamorphic units juxtaposed during the Variscan orogeny. The polyphase Variscan tectonothermal development of the West Sudetes was determined by 40Ar/39Ar ages of single grains and mineral concentrates. Late Famennian (359 Ma) mica ages from the high-grade Gory Sowie Block suggest continuous uplift after a Late Devonian high temperature-low pressure (HT-LP) event contemporaneous with the end of subduction-related high pressure-low temperature (HP-LT) metamorphism in the East Krkonoše Complex. Mid-Late Devonian high pressure events in the Krkonoše-Jizera Terrane and Orlica-Snieznik Dome are followed by coeval high temperature events between 345 and 335 Ma (Viséan). 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 Orlica-Snieznik Dome, Krkonoše-Jizera Terrane, including the Intra-Sudetic Fault, and also the eastern Lusatian Granitoid Complex. They 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
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    24. 10. 2007
Datum importu
    8. 8. 2012