Podrobnosti záznamu

Název
    Carboniferous tectonics of the Variscan basement collage in eastern Bavaria and western Bohemia
Údaj o odpovědnosti
    J.H. Behrmann, David C. Tanner
Další názvy
    The German deep drilling project, KTB (Variant.)
Autor
    Behrmann, J. H.
    Tanner, David C.
Jazyk
    anglicky
Zdrojový dokument - seriál
    Geologische Rundschau
Svazek/č.
    Vol. 86, no. Suppl.
Strany
    p. 15-27
Rok
    1997
Poznámky
    6 obr., 1 fot., 2 tab., 3 s.bibl.
    Zkr. název ser.: Geol. Rdsch.
Předmětová skupina
    bohemikum
    deformace
    geologie regionální
    granitoidy
    karbon
    kinematika
    metamorfóza
    migmatit
    moldanubikum
    saxothuringikum
    vrásnění variské
Geografické jméno
    ČR-Čechy
    SRN-Bayern
Klíčové slovo
    Basement
    Bavaria
    Bohemia
    Carboniferous
    Collage
    Eastern
    Tectonics
    Variscan
    Western
Abstrakt (anglicky)
   The tectonometamorphic units in the Variscan basements of eastern Bavaria and western Bohemia have a long and complex record of large-scale continental deformation, metamorphism, and syn- and post-tectonic magmatism. Although there is a large database describing each of the above-mentioned phenomena, an integrated tectonic synthesis is hard to achieve. In this paper we review some of the prominent effects in the Carboniferous tectonic evolution, which is accountable for much of the deformation, regionally extensive low-pressure/high-temperature metamorphism, and abnormally intense partial anatexis and plutonism. Deformation was multistage and its kinematics were dominated by lateral compression, transpression, and strike-slip shearing. Tectonic units were mostly deformed "en masse", without operation of large, discrete shear zones.
   An exception were the boundary zones of those units that had already cooled to sub-greenschist-facies temperatures before the onset of Carboniferous deformation. These boundaries were operated as normal or transtensive faults. The large present vertical thickness of the Zone of Erbendorf-Vohenstrauss at the KTB drill site is most probably due to a combination of Carboniferous block tilting related to the intrusion of the Falkenberg granite, and Cretacous distributed reverse faulting and imbrication. Late-orogenic plutonism in the Bohemian massif led to the emplacement of at least 176 000 km3 of granitoids. Melt flux through the Moldanubian unit may have been as high as 0.2km/m.y., allowing the estimated volume of granitoids to be segregated by partial anatexis of the continental crust within a time span of approximately 8.8 million years
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    17. 8. 2007
Datum importu
    8. 8. 2012