Record details

    Variscan veins: record of fluid circulation and Variscan tectonothermal events in Upper Palaeozoic limestones of the Moravian Karst, Czech Republic
    Keppens, Eddy
    Král, Jan
    Muchez, Philippe
    Slobodník, Marek
Publication type
    článek v periodiku
Source title - serial
    Geological Magazine
    Roč. 143, č. 3
Thesaurus term
    calcite veins
    fluid dynamics
    syntectonic processes
Abstract (in english)
   Numerous Variscan syntectonic calcite veins crosscut Palaeozoic rocks in the Moravian Karst. The isotopic signatures point to precipitation in an older fluid system buffered by the host rock (white calcites) and to an open, younger fluid dominated system (rose calcites). Parent fluids (H2O-NaCl system) had salinities between 0.35 and 17.25 eq. wt% NaCl and temperature between 120 and 170C, a pressure of 300-880 bar at a depth between 2.1 and 3.2 km. The fluids were most likely confined to a particular sedimentary bed as a bed-scale fluid migration. The low temperatures and pressures during precipitation of calcites, which took place close to a peak of burial/deformation, confirm the distal position of the Moravian Karst region within the Variscan orogen.
    MU Brno, Přírodovědecká fakulta
Contributor code
    MU, PřF
Source format
Import date
    8. 8. 2012