Record details

Title
    Geochemical study of calcite veins in the Silurian and Devonian of the Barrandian Basin (Czech Republic): evidence for widespread post-Variscan fluid flow in the central part of the Bohemian Massif
Statement of responsibility
    Václav Suchý, W. Heijlen, Ivana Sýkorová, Philippe Muchez, Petr Dobeš, Jana Hladíková, Ivana Jačková, Jan Safanda, Antonín Zeman
Other titles
    Palaeofluid Flow and Diagenesis during Basin Evolution (Variant.)
Author
    Dobeš, Petr
    Heijlen, W.
    Hladíková, Jana
    Jačková, Ivana
    Muchez, Philippe
    Palaeofluid flow and diagenesis during basin evolution, 199804
    Safanda, Jan
    Suchý, Václav
    Sýkorová, Ivana, 1969-
    Zeman, Antonín
Other author; role
   Bechstädt, Thilo
   Původce

   Muchez, Philippe
   Původce
Language
    anglicky
Source title - serial
    Sedimentary geology
Vol./nr.
    Vol. 131, no. 3-4
Pages
    p. 201-219
Year
    2000
Notes
    8 obr., 2 fot., 1 tab., 3 s.bibl.
    il.
    Zkr. název ser.: Sedimentary Geol.
Subject group
    Barrandien
    bitumen
    cementace
    devon
    geotermometrie
    inkluze fluidní
    izotopy C
    izotopy O
    izotopy stabilní
    karbonáty
    katodoluminiscence
    pražská pánev
    silur
    vápenec
    žíla
Geographical name
    Beroun-Kosov
    ČR-Čechy
    Koněprusy (Beroun)
    Mořina (Beroun)
    Praha
    Srbsko (Beroun)
    Trněný Újezd (Beroun)
Keyword
    Barrandian
    Basin
    Bohemian
    Calcite
    Central
    Czech
    Devonian
    Evidence
    Flow
    Fluid
    Geochemical
    Massif
    Post-Variscan
    Republic
    Silurian
    Study
    Veins
    Widespread
Abstract (in english)
   Carbonate fracture cements in limestones have been investigated by fluid inclusion and stable analysis to provide insight into fluid evolution and deformation conditions of the Barrandian Basin (Silurian-Devonian) of the Czech Republic. The fracture strike generally north-south and appear to postdate major Variscan deformation. The most common fracture cement is calcite that is locally accompanied by quartz, natural bitumen, dolomite, Mn-oxides and fluorite. Three successive generations of fracture-filling calcite cements are distinguished based on their petrographical and geochemical characteristics. The oldest calcite cements (stage 1) are moderate to dull brown cathodoluminescent, Fe-rich and exhibit intense cleavage, subgrain development and other feaures characteristic of tectonic deformation. Less tectonically deformed, variable luminescent Fe-poor calcite corresponds to a paragenetically younger Stage 2 cement.
   First metling temperatures, Te of two-phase aqueous inclusions in Stages 1 and 2 calcites are often around -20°C, suggesting that precipitation of the cements occurred from H2O-NaCl fluids. The melting temperature Tm has values between O and -5.8°C, corresponding to a low salinity between 0 and 8.9 eq. wtNaCl. Homogenization temperatures, Th from calcite cements are interpreted to indicate precipitation at about 70°C or less. No distinction could be made between the calcite of Stages 1 and 2 based on their fluid inclusion characteristics. In some Stage 2 cements, inclusions of highly saline (up to 23 eq. wt
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    27. 4. 2007
Import date
    8. 8. 2012