Record details

    Hydrothermal veins linked with Variscan structure of the Prague Synform (Barrandien, Czech Republic): resolving fluid-wall rock interaction
    Krmíčková, Michaela
    Melichar, Rostislav
    Slobodník, Marek
Publication type
    článek v periodiku
Source title - serial
    Geological Quarterly
    Roč. 52, č. 4
Thesaurus term
    Bohemian Massif
    hydrothermal veins
    Variscan orogeny
Abstract (in english)
   Variscan syntectonic hydrothermal veins of the Prague Synform are im portant traces of small-scale fluid migration in Lower Palaeozoic sedimentary rocks - a process in duced by late Variscan tectogenesis. Two main structural types of Variscan syntectonic calcite veins were recognised during field work. Veins of Type I have an irregular or sigmoidal shape and are of ten arranged in enechelon arrays. A shearing regime during the formation of this type is deduced. Veins of a second structural type (Type II) have a more regular and straight shape relative to those of Type I and in some places form a dense net work. The structural position of the Type II veins is related to structural elements of Variscan folds. Veins were formed due to interlayer-slip combined with fold-related fracturing that gave rise to the infilling of dilational structures. A tensional regime also permits growth of the fibrous veins. Two principal directions were distinguished within the Type II veins.
    MU Brno, Přírodovědecká fakulta
Contributor code
    MU, PřF
Source format
Import date
    8. 8. 2012