Record details

Title
    The Tepla/Saxothuringian suture in the Karkonosze-Izera massif, western Sudetes, central European Variscides
Statement of responsibility
    Stanislaw Mazur, Paweł Aleksandrowski
Author
    Aleksandrowski, Paweł
    Mazur, Stanisław
Language
    anglicky
Source title - serial
    International journal of Earth sciences (Geologische Rundschau)
Vol./nr.
    Vol. 90, no. 2
Pages
    p. 341-360
Year
    2001
Notes
    7 obr., 3 fot., 3 s.bibl.
    il.
    Zkr. název ser.: Int. J. Earth Sci. (Geol. Rdsch.)
Subject group
    bohemikum
    denudace
    geologie strukturní
    krkonošsko-jizerské krystalinikum
    metamorfika
    metamorfóza
    paleozoikum
    příkrov
    saxothuringikum
    vrásnění variské
    zóna suturová
Geographical name
    ČR-Čechy
    Krkonoše
    Polsko - jihozápad
Keyword
    Central
    European
    Karkonosze-Izera
    Massif
    Sudetes
    Suture
    Tepla/Saxothuringian
    Variscides
    Western
Abstract (in english)
   The southern and eastern Karkonosze-Izera massif (northern Bohemian Massif) exposes blueschist facies rocks and MORB-type magmatic complexes. During Late Devonian to Early Carboniferous times, these were overthrust within a nappe pile toward the NW onto the pre-Variscan Saxothuringian basement composed of the Izera-Kowary metagranitoids and their envelope. The lowermost nappe (or parautochthonous?) unit of the pile is the low-grade metamorphosed Ještěd complex, comprising a Devonian to Early Carboniferous sedimentary succession of the Saxothuringian passive margin. This is tectonically overlain by the South Karkonosze complex, which represents Ordovician-Silurian volcano-sedimentary infill of the Saxothuringian basin, affected by late Devonian HP metamorphism. The uppermost nappe is the Early Palaeozoic epidote-amphibolite grade Leszczyniec MORB-like complex, cropping out on the eastern margin of the Karkonosze-Izera massif.
   It probably represents a fragment of obducted Saxothuringian basin floor. The nappe pile was stacked beneath the overriding upper plate margin, now concealed below the Intra-Sudetic basin and hypothesized to represent a fragment of the Tepla-Barrandian terrane. The nappe stacking, triggered by buoyancy-controlled upward extrusion of the subducted continental slab, was the main mechanism for the exhumation of HP rocks. The final stages of the NW-ward nappe stacking were accompanied and followed by SE-directed Early Carboniferous extensional collapse
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    7. 4. 2008
Import date
    8. 8. 2012