Počet záznamů: 1

Fine-grained non-carbonate particles embedded in neritic to pelagic limestones (Lochkovian to Emsian, Prague synform, Czech Republic): composition, provenance and links to magnetic susceptibility and gamma-ray logs

  1. 1.
    0345504 - GLU-S 2011 RIV BE eng J - Článek v odborném periodiku
    Koptíková, Leona - Hladil, Jindřich - Slavík, Ladislav - Čejchan, Petr - Bábek, O.
    Fine-grained non-carbonate particles embedded in neritic to pelagic limestones (Lochkovian to Emsian, Prague synform, Czech Republic): composition, provenance and links to magnetic susceptibility and gamma-ray logs.
    GEOLOGICA BELGICA. Roč. 13, č. 4 (2010), s. 407-430 ISSN 1374-8505
    Grant CEP: GA AV ČR IAA300130702; GA ČR GAP210/10/2351
    Výzkumný záměr: CEZ:AV0Z30130516
    Klíčová slova: non-carbonate impurities * limestones * magnetic susceptibility * gamma-ray spectrometry * REE distributions * atmospheric dust * Lower Devonian * Prague Synform
    Kód oboru RIV: DB - Geologie a mineralogie
    Impakt faktor: 0.645, rok: 2010
    http://popups.ulg.ac.be/Geol/docannexe.php?id=3123

    This paper deals with the variations in non-carbonate impurities trapped in the Lower Devonian limestone beds in the Prague Synform.Different assemblages are encountered for the Lochkovian, lower Emsian and Pragian.The Lochkovian is characterized by pyrite–pyrrhotite assemblages with lower abundance of iron oxides-oxyhydroxides,the Pragian shows relatively abundant iron oxides-oxyhydroxides.Major changes in magnetic susceptibility (MS) and gamma-ray spectrometric logs also coincide with the Lochkovian/Pragian boundary. Maximum values of MS and relatively high Th, K concentrations above the boundary correspond to the elevated amounts of barite and Ba concentrations.This level is interpreted as a significant interval with elevated delivery of impurities of aeolian origin, deceleration of sedimentation rate together with decreased carbonate productivity.REE distributions are indicative of the aeolian origin of trapped impurities.
    Trvalý link: http://hdl.handle.net/11104/0186761