Record details

Title
    The oxygen and carbon isotopic composition of Langhian foraminiferal tests as a paleoecological proxy in a marginal part of the Carpathian Foredeep (Czech Republic)
Author
    Demeny, Attila
    Holcová, Katarína
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Geologica Carpathica
Vol./nr.
    Roč. 63, č. 2
Pages
    17
Year
    2012
Thesaurus term
    Badenian
    calcareous nannoplankton
    Carpathian Foredeep
    foraminifera
    Middle Miocene
    oxygen and carbon stable isotopes
    paleoecology
Keyword
    Carbon
    Carpathian
    Composition
    Czech
    Foraminiferal
    Foredeep
    Isotopic
    Langhian
    Marginal
    Oxygen
    Paleoecological
    Proxy
    Republic
    Tests
Abstract (in english)
   Foraminiferal assemblages from three locations of the Moravian part of the Carpathian Foredeep (Kralice, Premyslovice, Zidlochovice) have been studied in order to determine the paleoenvironmental conditions during the Early Badenian (Middle Miocene). Paleobiological characteristics (plankton/benthos-ratio, relative abundances of warm-water plankton species, five-chambered Globoturborotalita spp., Coccolithus pelagicus and high nutrient markers [benthos], test sizes and ranges of Globigerina sp. and cibicidoids, Benthic Foraminiferal Oxygen Index) were determined along with stable C and 0 isotope compositions. The stable isotope compositions show large variabilities indicating sample inhomogeneity in well preserved foraminiferal samples, interpreted as a sign of primary environmental variation and postmortem mixing of tests of different populations and sources. Based on the combined interpretation of paleobiological indicators and isotopic compositions, two theoretical models were estab
   lished to describe the observed paleobiological and stable isotope data, that were used to categorize the locations studied. Several types of near-shore paleoenvironment were distinguished using the theoretical models: (i) bay influenced by seasonal phytodetritus supply from the continent (Kralice); (ii) dynamic shore characterized by variable isotopic compositions probably due to mixing of indigenous, transported and reworked tests (Premyslovice); (iii) shore of alternating normal marine and continentally influenced environments (Zidlochovice).
Contributor
    UK Praha, Přírodovědecká fakulta
Contributor code
    UK, PřF
Source format
    R
Import date
    27. 4. 2014