Podrobnosti záznamu

    High-pressure partial melting and melt loss in felsic granulites in the Kutná Hora complex, Bohemian Massif (Czech Republic)
    Dolejš, David
    Faryad, Shah
    Konzett, Jürgen
    Nahodilová, Radmila
    Tropper, Peter
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Roč. 125, č. 1-2
Výraz tezauru
    Felsic granulite, High-pressure metamorphism, Partial melting, Bohemian Massif, Variscan orogeny
Klíčové slovo
Abstrakt (anglicky)
   Felsic granulites from the Kutná Hora complex in the Moldanubian zone preserve mineral assemblage that records transition from early eclogite to granulite facies conditions, and exhibits leucocratic banding, which is interpreted as an evidence for melt loss during the decompression path. Garnet cores grew during omphacite breakdown and phengite dehydration melting at 940 °C and 2.6 GPa, following by decompression heating to 1020 °C and 2.1 GPa. The maximum melt productivity was 26 and 18 vol.%, respectively, at peak temperature ~1.05-0.75 H2O wt.%, prior to the melting. The preservation of prograde garnet-rich assemblages required nearly complete melt loss (15-25 vol.%), interpreted to have occurred at 1000-1020 °C and 2.2-2.4 GPa by garnet mode isopleths, followed by crystallization of small amounts of residual melt at 760 °C and 1.0 GPa. Phase formation and melt productivity were independently determined by experiments in the piston-cylinder apparatus at 850-1100 °C and 1.7-2.1 GPa.
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
Datum importu
    15. 10. 2014