Podrobnosti záznamu

Název
    A numerical model of exhumation of the orogenic lower crust in the Bohemian Massif during the Variscan orogeny
Autor
    Čadek, Ondřej
    Lexa, Ondrej
    Maierová, Petra
    Schulmann, Karel
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    STUDIA GEOPHYSICA ET GEODAETICA
Svazek/č.
    Roč. 56, č. 2
Strany
    25
Rok
    2012
Výraz tezauru
    CENTRAL-EUROPE
    delamination
    felsic granulites
    FLOWS
    GEOCHRONOLOGY
    LARGE HOT OROGENS
    MECHANISMS
    Moldanubian zone
    PRESSURE
    radiogenic heating
    RHEOLOGY
    ROCKS
    ROOT
    TECTONIC EVOLUTION
Klíčové slovo
    Bohemian
    Crust
    During
    Exhumation
    Lower
    Massif
    Model
    Numerical
    Orogenic
    Orogeny
    Variscan
Abstrakt (anglicky)
   We present a numerical model of the main phase (370-335 Ma) of the Variscan orogeny in the central part of the Bohemian Massif. The crustal deformation in our model is driven by radiogenic heating in the felsic lower crust, the lateral contraction of the Moldanubian domain due to convergence with the Saxothuringian plate (in the early stage of orogeny), and the indentation of the Brunovistulian basement into the weakened orogenic root (in the late stage). Our model explains the main geological events inferred from the geological record in the Moldanubian domain: formation of the orogenic plateau and onset of sedimentation at about 345 Ma, rapid exhumation of the orogenic lower crust at about 340 Ma and subsurface flow of crustal material (similar to 335 Ma and later). The results of our modeling suggest that delamination of the lithosphere, often invoked to explain the high temperature metamorphism in the orogenic lower crust of the Bohemian Massif, is not the only physical mechanism w
   hich can transfer a sufficient amount of heat to the crust to trigger its overturn.
Přispěvatel
    UK Praha, Přírodovědecká fakulta
Kód přispěvatele
    UK, PřF
Zdrojový formát
    R
Datum importu
    27. 4. 2014