Podrobnosti záznamu

Název
    Eastern Variscan fold belt: Paleomagnetic evidence for oroclinal bending
Údaj o odpovědnosti
    J.A. Tait, V. Bachtadas, H. Soffel
Autor
    Bachtadas, V.
    Soffel, H.
    Tait, J. A.
Jazyk
    anglicky
Zdrojový dokument - seriál
    Geology
Svazek/č.
    Vol. 24, no. 10
Strany
    p. 871-874
Rok
    1996
Poznámky
    4 obr., 1 tab., 43 bibl.
    Zkr. název ser.: Geology
Předmětová skupina
    devon
    karbon
    magnetizace
    moravskoslezský devon a spodní karbon
    paleomagnetismus
    rotace desek
    vrásnění variské
Geografické jméno
    ČR-Morava
    Evropa
Klíčové slovo
    Belt
    Bending
    Eastern
    Evidence
    Fold
    Oroclinal
    Paleomagnetic
    Variscan
Abstrakt (anglicky)
   The Rhenohercynian zone of Variscan Europe trends from southern Portugal, around the Ibero-Armorican arc, into southern Britain, Belgium, northern Germany, and the Moravo-Silesian zone of the east Czech Republic. Although the geodynamic evolution of the central and western segments of this arcuate belt is now fairly well understood, the scenarion for the more easterly parts remains enigmatic. A paleomagnetic study of Upper Devonian rocks from the Moravo-Silesian zone has been undertaken. Two ancient directions of magnetization have been identified. The first (the A magnetization) is secondary in origin and relates to a remagnetization of Permian-Carboniferous age. The B magnetization passes the fold test, is considered Late Devonian in age, and agrees in terms of inclination to previously published paleomagnetic results from coeval rocks of the Harz Mountains and Franconian Forest, central Europe. The declination, however, differs by about 90.
   Restoring the Moravo-Silesian zone to its original Devonian orientation as defined by the new paleomagnetic data brings the structural trends of central and eastern Europe into agreement. Because they were previously part of the same tectonostratigraphic unit, as suggested by the stratigraphic record, this implies that rotational oroclinal bending around the northern and eastern flanks of the Bohemian massif occurred sometime between the Late Devonian and Late carboniferous
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    21. 2. 2008
Datum importu
    8. 8. 2012