Podrobnosti záznamu

    Variscan granitoids of central Europe: their typology potential sources and tectonothermal relations
Údaj o odpovědnosti
    F. Finger, M. P. Roberts, B. Haunschmid, A. Schermaier, H. P. Steyrer
Další názvy
    Die variszischen Granitoide Mitteleuropas: Typologie, potentielle Quellen und tektonothermische Zusammenhänge
    Finger, F.
    Haunschmid, B.
    Roberts, M. P.
    Schermaier, A.
    Steyrer, H. P.
Zdrojový dokument - seriál
    Mineralogy and petrology
    Vol. 61, no. 1-4
    p. 67-96
    6 obr., 2 tab., 7 s.bibl.
    Německé resumé
    Zkr. název ser.: Mineral. and Petrology
Předmětová skupina
    Český masiv
    vrásnění variské
Geografické jméno
    Česká republika
Klíčové slovo
Abstrakt (anglicky)
   During the Variscan orogenic cycle, central Europe was intruded by numerous granitoid plutons. Typological and age relationships show that the characteristics of the granitoid magmatism changed the course of the Variscan orogeny. Five genetic groups of granitoids may be distinguished: 1. Late Devonian to early Carboniferous "Cordilleran" I-type granitoids (ca. 370-340 Ma) are mainly tonalites and granodiorites. 2. Early Carboniferous, deformed S-type granite/migmatite association (ca. 340 Ma) occurs in the footwall of a thick thrust in Southern Bohemia (Gföhl nappe) and seem to represent a phase of water-present, syn-collisional crustal melting related to nappe stacking. 3. Late Visean and early Namurian S-type and high-K, I-type granitoids (ca. 340-310 Ma) are mainly granitic in composition and particularly abundant along the central axis of the orogen (Moldanubian unit). 4. Post-collisional, epizonal I-type granodiorites and tonalites (ca.
   310-290 Ma) can be found throughout the central European Variscides. However, most of them occur in the Alps (near the southern flank of the orogen). Such late I-type plutons could be related to renewed subduction along the southern fold belt flank, and/or to extensional decompression melting near the crust/mantle boundary. 5. Late Carboniferous to Permian leucogranites (ca. 300-250 Ma) are similar to sub-alkaline A-type granites. Potential sources for this final stage of plutonism could have been melt-depleted lower crust or lithospheric mantle
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
Datum vložení
    21. 2. 2008
Datum importu
    8. 8. 2012