Record details

Title
    Constraints on the origin of gabbroic rocks from the Moldanubian-Moravian units boundary (Bohemian Massif, Czech Republic and Austria)
Author
    Ackerman, Lukáš
    Balogh, Kadosa
    Fediuk, Ferry
    Filip, Jiří
    Hegner, Ernst
    Kachlík, Václav
    Lang, Miloš
    Langrová, Anna
    Luna, Jan
    Ulrych, Jaromír
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Geologica Carpathica
Vol./nr.
    Roč. 61, č. 3
Pages
    17
Year
    2010
Thesaurus term
    Bohemian Massif
    gabbroic rocks
    geochemistry
    K-Ar ages
    Moldanubian Unit
    Moravian Unit
    Sr-Nd isotopes
Keyword
    Austria
    Bohemian
    Boundary
    Constraints
    Czech
    Gabbroic
    Massif
    Moldanubian-Moravian
    Origin
    Republic
    Rocks
    Units
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.
Contributor
    UK Praha, Přírodovědecká fakulta
Contributor code
    UK, PřF
Source format
    R
Import date
    8. 8. 2012