Record details

Title
    Carbon and oxygen isotope record across Přídolí to Givetian stage boundaries in the Barrandian basin (Czech Republic)
Statement of responsibility
    Jana Hladíková, Jindřich Hladil, Bohdan Kříbek
Other titles
    Geochemical event markers in the phanerozoic (Variant.)
Author
    Hladíková, Jana
    Hladil, Jindřich, 1953-
    Kříbek, Bohdan, 1946-
Language
    anglicky
Source title - serial
    Palaeogeography, palaeoclimatology, palaeoecology
Vol./nr.
    Vol. 132, no. 1-4
Pages
    p. 225-241
Year
    1997
Notes
    9 obr., 8 tab., 25 bibl.
    Zkr. název ser.: Palaeogeogr. Palaeoclimatol. Palaeoecol.
Subject group
    Barrandien
    devon
    geochemie izotopická
    izotopy C
    izotopy O
    sedimenty karbonátové
    silur
    stratigrafická hranice
Geographical name
    ČR-Čechy
    Karlštejn (Beroun)
    Koněprusy (Beroun)
    Praha-Velká Chuchle
    Suchomasty (Beroun)
Keyword
    Across
    Barrandian
    Basin
    Boundaries
    Carbon
    Czech
    Givetian
    Isotope
    Oxygen
    Přídolí
    Record
    Republic
    Stage
Abstract (in english)
   Carbon and oxygen isotope composition and the chemistry of limestones, clayey limestones and shales were studied across stage boundaries from Pridoli to Givetian in the Barrandian basin. No substantial isotope shifts were found at the Pragian-Emsian and Emsian-Eifelian boundaries. A gradual shift in 13C values from -2.6 to +3.6 per mille was observed in Pridoli and Lochkovian limestones. This shift is inferred to have been related to a combination of higher productivity, increased deposition of organic matter and shallowing of the basin. The global Kačák-otomari event just below the Eifelian-Givetian boundary is marked by an abrupt change in carbon isotopic values from about 1 to 3 per mille in pelagic carbonates. No 13C shift was found in shallow-water carbonates at the Eifelian-Givetian boundary. High 18O values up to -1.3 per mille in Pragian.
   Emsian and early Eifelian limestones indicate that the Barrandian basin was relatively isolated from the world ocean during those intervals. Lower 18 values up to -7.5 per mille in late Eifelian limestones may indicate the end of isolation
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    20. 6. 2008
Import date
    8. 8. 2012