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.
SYSNO ASEP 0345504 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název 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 Tvůrce(i) 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)Zdroj.dok. GEOLOGICA BELGICA - ISSN 1374-8505
Roč. 13, č. 4 (2010), s. 407-430Poč.str. 24 s. Forma vydání WWW - WWW Jazyk dok. eng - angličtina Země vyd. BE - Belgie Klíč. slova non-carbonate impurities ; limestones ; magnetic susceptibility ; gamma-ray spectrometry ; REE distributions ; atmospheric dust ; Lower Devonian ; Prague Synform Vědní obor RIV DB - Geologie a mineralogie CEP IAA300130702 GA AV ČR - Akademie věd GAP210/10/2351 GA ČR - Grantová agentura ČR CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000285908500009 EID SCOPUS 77954615064 Anotace 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. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2011
Počet záznamů: 1