Record details

    Constraints on the origin of gabbroic rocks from the Moldanubian-Moravian units boundary (Bohemian Massif, Czech Republic and Austria)
    Ackerman, Lukáš
    Balogh, Kadosa
    Fediuk, Ferry
    Filip, Jiří
    Hegner, Ernst
    Kachlík, Václav
    Lang, Miloš
    Langrová, Anna
    Luna, Jan
    Ulrych, Jaromír
Publication type
    článek v periodiku
Source title - serial
    Geologica Carpathica
    Roč. 61, č. 3
Thesaurus term
    Bohemian Massif
    gabbroic rocks
    K-Ar ages
    Moldanubian Unit
    Moravian Unit
    Sr-Nd isotopes
Abstract (in english)
   Gabbroic bodies from the Moldanubian Monotonous Group (Maříř) and the Moravian Vratěnín Unit, often showing retrogressive recrystallization at their margins in the amphibolite-facies grade, have norite, gabbronorite, gabbro and hornblendite compositions. Gabbros with preserved coronitic textures are limited to the Vratěnín Unit. The estimated equilibration temperatures derived from plagioclase-amphibole pairs and orthopyroxene Ca contents calculated for pressures 5-10 kbar overlap are 680-850 °C. Gabbroic rocks from Maříž should represent an underplated, partly layered cumulate body of continental tholeiite composition, strongly influenced by crustal contamination. In contrast, gabbroic bodies from the Vratěnín Unit, having a close spatial relationship to the surrounding garnet amphibolites, were emplaced into a lithologically variable passive margin sequence probably during the Cadomian extension.
    UK Praha, Přírodovědecká fakulta
Contributor code
    UK, PřF
Source format
Import date
    8. 8. 2012