Record details

    Single zircon ages and whole-rock Nd isotopic systematic of early Paleozoic granitoid gneisses from the Czech and Polish Sudetes (Jizerské hory, Krkonoše Mountains and Orlice-Sněžník Complex)
    Hegner, Erwin
    Jaeckel, Petra
    Kröner, Alfred
    Opletal, Mojmír
Publication type
    článek v periodiku
Source title - serial
    International Journal of Earth Sciences
    Roč. 90, č. 1
Thesaurus term
    Avalonia, granitoid gneisses, Nd isotopes, Sudetes, Zircon, Geochronology
Abstract (in english)
   Granitoids orthogneisses from Jizerské hory, Krkonoše, Orlické hory and Sněžník Mountains have calc-alcalic composition and trace elements are chracteristic for volcanic arc setting.Single zircon ages reflecting the time of eplacement of the gneiss protholits define a relatively narrow Cambro-Ordovician range between 502 and 515 Ma. This post-Cadomian magmatic event we relate to continental arc magmatism on the margin ofAvalonia that developed during closure of the Tornquist Ocean. An age of 492 Ma for a no-metamorphosed microgranite dyke cutting deformed and metamorphosed orthogneisses un the Orlické hory shows the main deformation to be early Paleozoic.
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
Import date
    15. 10. 2014