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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
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SYSNO ASEP 0345504 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title 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 Author(s) Koptíková, Leona (GLU-S) RID, SAI
Hladil, Jindřich (GLU-S) RID, SAI
Slavík, Ladislav (GLU-S) RID, SAI, ORCID
Čejchan, Petr (GLU-S) RID, SAI
Bábek, O. (CZ)Source Title GEOLOGICA BELGICA - ISSN 1374-8505
Roč. 13, č. 4 (2010), s. 407-430Number of pages 24 s. Publication form WWW - WWW Language eng - English Country BE - Belgium Keywords non-carbonate impurities ; limestones ; magnetic susceptibility ; gamma-ray spectrometry ; REE distributions ; atmospheric dust ; Lower Devonian ; Prague Synform Subject RIV DB - Geology ; Mineralogy R&D Projects IAA300130702 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GAP210/10/2351 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000285908500009 EID SCOPUS 77954615064 Annotation 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. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2011
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