Podrobnosti záznamu

    Palaeozoic amalgamation of Central Europe: an introduction and synthesis of new results from recent geological and geophysical investigations
Údaj o odpovědnosti
    John A. Winchester, T.C. Pharaoh, Jacques Verniers
Další názvy
    Palaeozoic Amalgamation of Central Europe (Variant.)
    Pharaoh, T. C.
    Verniers, Jacques
    Winchester, John A.
Zdrojový dokument - seriál
    Geological society special publication
    Vol. 201
    p. 1-18
    8 obr., 6 s. bibl.
    Zkr. název ser.: Geol. Soc. spec. Publ. (London).
Předmětová skupina
    krystalinikum Českého masivu
    kůra zemská
    mapa paleogeografická
    tektonika bloková
    vrásnění variské
Geografické jméno
    Česká republika
Klíčové slovo
Abstrakt (anglicky)
   Multidisciplinary studies undertaken within the EU-funded PACE Network have permitted a new 3-D reassessment of the relationships between the principal erustal blocks abutting Baltica along the Trans-European Suture Zone (TESZ). The simplest model indicates that accretion was in three stages: end-Cambrian accretion of the Bruno-Silesian, Lysogory and Malopolska terranes; late Ordovician accretion of Avalonia, and early Carboniferous accretion of the Armorican Terrane Assemblage (ATA), which had coalesced during Late Devonian - Early Carboniferous time. All these accreted blocks contain similar Neoproterozoic basement indicating a peri-Gondwanan origin: Palaeozoic plume-influenced metabasite geochemistry in the Bohemian Massif in turn may explain their progressive separation from Gondwana before their accretion to Baltica, although separation of the Bruno-Silesian and related blocks from Baltica during the Cambrian is contentious.
   Inherited ages from both the Bruno-Silesian erustal block and Avalonia contain a 1.5 Ga 'Rondonian' component arguing for proximity to the Amazonian craton at the end of the Neoproterozoic: such a component is absent from Armorican terranes, which suggests that they have closer affinities with the West African craton. Models showing the former locations of these terranes and the larger continents from which they rifted, or to which they became attached, must conform to the above constraints, as well as those provided by palaeomagnetic data. Hence, at the end of the Proterozoic and in the early Palaeozoic, these smaller terranes, some of which contain Neoproterozoic ophiolitic marginal basin and magmatic arc remnants, probably occurred within the end-Proterozoic supercontinent as part of a 'Pacific-type' margin, which became dismembered and relocated as the supercontinent fragmented
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
Datum vložení
    3. 4. 2008
Datum importu
    8. 8. 2012