Record details

    Eclogite-facies metamorphism at the eastern margin of the Bohemian Massif - subduction prior to continental underthrusting?
Statement of responsibility
    Jiří Konopásek, Karel Schulmann, Věra Johan
    Johan, Věra
    Konopásek, Jiří
    Schulmann, Karel
Source title - serial
    European journal of mineralogy
    Vol. 14, no. 4
    p. 701-713
    6 obr., 1 fot., 2 tab., 2 s. bibl.
    Zkr. název ser.: Eur. J. Mineral.
Subject group
    chemismus minerálů
    facie eklogitová
    minerály horninotvorné
    podmínky P-T
    vrásnění variské
Geographical name
    Hutě (Svitavy)
    Letovice (Blansko)
    Olešnice (Blansko)
    Předměstí (Svitavy)
Abstract (in english)
   In garnetiferous micaschists occurring at the northern termination of the Moravian domain, metabasites were found containing relics eclogite-facies assemblages. In these rocks, minimum pressure conditions of 13 kbar at temperature of 625-655 °C were followed by decompression to amphibolite-facies conditions. Surrounding metapelites contain Fe-rich chloritoid and Ferich staurolite preserved as inclusions in garnet porphyroblasts indicating early PT conditions of 570 °C at pressures of 6-7 kbar. The matrix assemblage shows as increase of temperature and pressure to about 615 °C at 6.5-9 kbar. The PT paths of both metapelite and amphibolitized eclogite are suggested to converge at the peak temperature conditions of the metasediments. The PT evolution of the eclogitic sample and of the surrounding metapelites is different from the PT history of the same rocks occurring in the Moldanubian domain but similar to that of the Moravian metasediments.
   Thus, the presence of eclogite-facies metamorphism at the eastern margin of the Bohemian massif suggests early subduction and subsequent collision of the Brunovistulian foreland with the internal Variscan orogenic root domain
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    21. 3. 2008
Import date
    8. 8. 2012