Podrobnosti záznamu

Název
    Zircon (re)crystallization during short-lived, high-P granulite facies metamorphism (Eger Complex, NW Bohemian Massif)
Autor
    Konopásek, J.
    Košler, J.
    Pilátová, E.
    Sláma, Jiří
Jazyk
    anglicky
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Journal of Metamorphic Geology
Svazek/č.
    Roč. 32, č. 8
Strany
    s. 885-902
Rok
    2014
Poznámky
    Rozsah: 18 s. : P
Předmětová kategorie
    Bohemian Massif
    geochronology
    granulite
    zircon recrystallization
    zirconium saturation modelling
Klíčové slovo
    Bohemian
    Complex
    During
    Eger
    Facies
    Granulite
    High-P
    Massif
    Metamorphism
    NW
    Re)crystallization
    Short-lived
    Zircon
Abstrakt (anglicky)
   The Eger Complex in the northwestern Bohemian Massif consists mainly of amphibolite facies granitic gneisses containing a subordinate volume of felsic granulites. Microstructural changes and modelling of metamorphic conditions for both rock types suggest a short-lived static heating from ~760 to ~850 °C at a constant pressure of ~16 kbar, which led to the partial granulitization of the granitoid rocks. Detailed study of the protolith zircon modifications and modelling of the Zr re-distribution during the transition from amphibolite to granulite facies suggests that the development of c. 340 Ma old zircon rims in the granulite facies sample is the result of recrystallization of older (c. 475 Ma) protolith zircon.
   This study suggests that the partial granulitization is a result of a short exposure of the Eger Complex metagranitoids to a temperature of ~850 °C at the base of an arc/fore-arc domain and their subsequent rapid exhumation during the Lower Carboniferous collision along the western margin of the Bohemian Massif.
Přispěvatel
    AV ČR Brno, Geologický ústav
Kód přispěvatele
    AV ČR, GLÚ
Zdrojový formát
    U
Datum importu
    23. 10. 2014