Record details

    Origin of formation waters of S-E parts of the Bohemian Massif and the Vienna Basin
Statement of responsibility
    František Buzek, Miroslav Michalíček
    Bůzek, František
    Michalíček, Miroslav
Source title - serial
    Applied geochemistry
    Vol. 12, no. 3
    p. 333-343
    10 obr., 1 tab., 2 s.bibl.
    Zkr. název ser.: Appl. Geochem.
Subject group
    flyšové pásmo Západních Karpat
    geneze podzemních vod
    geochemie izotopická
    hydrogeologie regionální
    jihovýchodní svahy Českého masivu
    pole ropo-plynové
    vídeňská pánev
    voda podzemní
Geographical name
Abstract (in english)
   Deep formation waters sampled from boreholes on the S-E slopes of the Bohemian Massif. They are Na-Cl-HCO3 waters with TDS in the range 6-52gL-1. Some of them are associated with gas and oil deposits. The waters are rich in Br and I and their aD and 18O isotope compositions vary from -12 to 77 per mille and +4.6 to -10 per mille respectively. The processes of concentration and dilution have been discussed based on deuterium and conservative element contents of the waters. Three regional groups can be identified in the plots Br vs I and Cl vs I: the Vienna basin samples (VB), southern (S) and northern (N) flanks of the Bohemian Massif (BM). The VB samples have as an end member brackish water with about 7g L-1 Cl (about 40marine component) enriched in Br and I. This water has been later diluted by meteoric water of recent isotopic composition. Only 3 VB samples can be considered as derived from the dissolution of evaporites.
   The salt content of the S and N end members is very close to or higher than sea water with an isotopic composition similar to the brackish water. Subaerial evaporation of diluted sea water is suggested as the process increasing salt content. The evaporative enrichment of primary brackish solution can be estimated from extrapolation of Cl vs I and Br vs I plots to zero I (about 25 mg L-1 Br and 6 g L-1 Cl for the southern flanks of the BM). Evaporated solutions were later diluted by meteoric waters with D in the range from -50 to -80 per mille (southern flanks) and about -80 per mille (northern flanks)
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    20. 6. 2008
Import date
    8. 8. 2012