Podrobnosti záznamu

Název
    Pressure-Temperature and Fluid Evolution of Quartzo-Feldspathic Metamorphic Rocks with a Relic High-Pressure, Granulite-Facies History from the Central Erzgebirge (Saxony, Germany)
Údaj o odpovědnosti
    Arne P. Willner, Kerstin Rötzler, Walter V. Maresch = Kerstin Rötzler = Walter V. Maresch
Autor
    Maresch, Walter V.
    Rötzler, Kerstin
    Willner, A. P.
Jazyk
    anglicky
Zdrojový dokument - seriál
    Journal of petrology
Svazek/č.
    Vol. 38, no. 3
Strany
    p. 307-336
Rok
    1997
Poznámky
    11 obr., 4 fot., 5 tab., 3 s.bibl.
    Zkr. název ser.: J. Petrology
Předmětová skupina
    chemismus minerálů
    diagram fázový
    eklogit
    facie granulitová
    fáze fluidní
    granulit
    kolize desek
    krušnohorské krystalinikum
    metamorfóza vysokotlaká
    minerály horninotvorné
    peridotit
    podmínky P-T
    rula
    vrásnění variské
Geografické jméno
    ČR-Čechy
    Erzgebirge
    Krušné hory
    SRN-Sachsen
Klíčové slovo
    Central
    Erzgebirge
    Evolution
    Fluid
    Germany
    Granulite-Facies
    High-Pressure
    History
    Metamorphic
    Pressure-Temperature
    Quartzo-Feldspathic
    Relic
    Rocks
    Saxony
Abstrakt (anglicky)
   The Gneiss-Eclogite Unit is a composite tectonometamorphic unit within the Variscan Erzgebirge mega-antiform. It comprises migmatitic para- and orthogneisses, high-temperature (HT) mylonites, kyanite-bearing granulites, eclogites and garnet peridotites. Four different quartzo-feldspathic assemblages are recognized, in which maximum consitions of up to 830°C and 21 kbar were determined. The asemblages are characterized by the nearly complete prograde breakdown of biotite, by high grossular content (23-47 mol) of garnet in the presence of albite, and high Si contents of phengite [3.3-3.4 per formula unit (p.f.u.)].
    The kinked geometry of the PT path is characterized by (1) high-pressure (HP) equilibration, followed by near-isothermal decompression at high temperatures, during which rocks from different depths were amalgamated, and (2) extensive hydration and reequilibration at medium pressure, followed by rapid cooling during continued uplift, when the entire unit came into contact with cooler, now over- and underlying units. This scenario is attributed to continent collision orogenic collapse and disintegration of the HP unit during continuing collision, crustal stacking and uplift controlled by extension
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    28. 3. 2008
Datum importu
    8. 8. 2012