Record details

Title
    Hydrothermal veins linked with Variscan structure of the Prague Synform (Barrandien, Czech Republic): resolving fluid-wall rock interaction
Author
    Krmíčková, Michaela
    Melichar, Rostislav
    Slobodník, Marek
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Geological Quarterly
Vol./nr.
    Roč. 52, č. 4
Pages
    320
Year
    2009
Thesaurus term
    Barrandian
    Bohemian Massif
    hydrothermal veins
    Variscan orogeny
Keyword
    Barrandien
    Czech
    Fluid-wall
    Hydrothermal
    Interaction
    Linked
    Prague
    Republic
    Resolving
    Rock
    Structure
    Synform
    Variscan
    Veins
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.
Contributor
    MU Brno, Přírodovědecká fakulta
Contributor code
    MU, PřF
Source format
    R
Import date
    8. 8. 2012