Record details

Title
    Anticlockwise and clockwise rotations of the Eastern Variscides accommodated by dextral lithospheric wrenching: palaeomagnetic and structural evidence
Statement of responsibility
    Jean Bernard Edel, Karel Schulmann, František V. Holub
Author
    Edel, Jean Bernard
    Holub, František V.
    Schulmann, Karel
Language
    anglicky
Source title - serial
    Journal of the Geological society
Vol./nr.
    Vol. 160, no. 2
Pages
    p. 209-218
Year
    2003
Notes
    4 obr., 2 tab., 2 s. bibl.
    il.
    Zkr. název ser.: J. Geol. Soc. (Bath)
Subject group
    gabro
    granitoidy
    karbon
    lamprofyry
    ofiolity
    paleomagnetismus
    pluton
    posun horizontální na vertikálním zlomu
    rotace
    středočeský pluton
    vlastnosti magnetické
    vrásnění hercynské
    zkrácení kůry
    železnohorský pluton
Geographical name
    Česká republika
Keyword
    Accommodated
    Anticlockwise
    Clockwise
    Dextral
    Eastern
    Evidence
    Lithospheric
    Palaeomagnetic
    Rotations
    Structural
    Variscides
    Wrenching
Abstract (in english)
   New palaeomagnetic data from Lower Carboniferous granitoids of the orogenic root of the eastern Variscan belt (Moldanubian domain) show a polyphase palaeomagnetic record. Comparison of the data with existing palaeomagnetic measurements from Lower Palaeozoic sequences of the Bohemian Massif demonstrates a Carboniferous remagnetization of these latter units. All the data presented suggest that the Saxothuringian basement, the Moldanubian orogenic root system as well as the eastern Neoproterozoic Brunovistulian basement were already assembled during the Early Carboniferous. The whole Variscan belt subsequently rotated in a clockwise direction during Mid-Late Carboniferous times. Structural and geochronological data indicate that this rotation was accompanied by large-scale dextral wrenching along NW-SE-trending lithospheric faults. In a first stage, the blocks limited by wrench-faults rotated anticlockwise in bookshelf manner.
   The data presented rule out the existing model of oroclinal bending of the Rhenohercynian zone at the eastern termination of the Variscan belt
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    24. 10. 2007
Import date
    8. 8. 2012