Record details

    A structural model for the western-central Sudetes: a deformed stack of Variscan thrust sheets
Statement of responsibility
    Rosemary Seston, John A. Winchester, Marek A.J. Piasecki, Quentin G. Crowley, Peter A. Floyd
    Crowley, Quentin G.
    Floyd, Peter A.
    Piasecki, Marek A. J.
    Seston, Rosemary
    Winchester, John A.
Source title - serial
    Journal of the Geological society
    Vol. 157, no. 6
    p. 1155-1167
    7 obr., 2 fot., 1 tab., 2 s.bibl.
    Zkr. název ser.: J. Geol. Soc. (Bath)
Subject group
    chemismus hornin
    krkonošsko-jizerské krystalinikum
    vrásnění variské
    zóna střižná
Geographical name
    Polsko - jihozápad
Abstract (in english)
   A model based on new structural and geochemical data is presented. It unifies the structural history of the Izera, Rudawy Janowickie and Kaczawa complexes with the Fore Sudetic block, despite their current separation by the Intra-Sudetic and Marginal Sudetic faults. Above the granitoid Izera, Kowary and Wadroze gneisses, at the base of the structural sequence, the ductile Kowary shear zone marks the basal decollement of the Swierzawa thrust sheet, comprising often highly strained metasediments associated with enriched tholeiitic and alkaline metabasites. Above it, the ductile Kaczorów shear zone, corresponding to the main mylonitic zone within the Leszczyniec shear zone in the Rudawy Janowickie Complex, marks the base of the Dobromierz thrust sheet, characterized by voluminous MORB-like meta-tholeiites and minor metasediments in the higher parts of the Rudawy Janowickie and Kaczawa complexes and the Pyszczynska Hill area of the Fore-Sudetic Block.
   In the east the Sleza ophiolite and the Góry Sowie Block override the entire nappe stack. Kinematic fabrics in the major and related shear zones indicate D1 compressional transport towards the northwest, followed by minor D2 extensional movements. The thrust stack was deformed during D3 by southwest verging folds, was subsequently intruded by post-orogenic granites, and later disrupted by the Intra-Sudetic, Marginal Sudetic and associated faults
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    13. 2. 2007
Import date
    8. 8. 2012