Record details

Title
    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
Author
    Crowley, Quentin G.
    Floyd, Peter A.
    Piasecki, Marek A. J.
    Seston, Rosemary
    Winchester, John A.
Language
    anglicky
Source title - serial
    Journal of the Geological society
Vol./nr.
    Vol. 157, no. 6
Pages
    p. 1155-1167
Year
    2000
Notes
    7 obr., 2 fot., 1 tab., 2 s.bibl.
    Zkr. název ser.: J. Geol. Soc. (Bath)
Subject group
    chemismus hornin
    deformace
    granitoidy
    krkonošsko-jizerské krystalinikum
    metabazit
    metamorfóza
    paleozoikum
    petrogeneze
    přesmyk
    rula
    vrásnění variské
    zóna střižná
Geographical name
    ČR-Čechy
    Krkonoše
    Polsko - jihozápad
Keyword
    Deformed
    Model
    Sheets
    Stack
    Structural
    Sudetes
    Thrust
    Variscan
    Western-central
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
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    13. 2. 2007
Import date
    8. 8. 2012