Počet záznamů: 1
Crandallite-rich beds of the Libkovice member, most basin, Czech Republic: Climatic extremes or paleogeographic changes at the onset of the Miocene Climatic Optimum?
- 1.
SYSNO ASEP 0547006 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Crandallite-rich beds of the Libkovice member, most basin, Czech Republic: Climatic extremes or paleogeographic changes at the onset of the Miocene Climatic Optimum? Tvůrce(i) Mach, K. (CZ)
Rapprich, V. (CZ)
Faměra, Martin (UACH-T) SAI, ORCID, RID
Havelcová, Martina (USMH-B) RID, ORCID
Matys Grygar, Tomáš (UACH-T) RID, SAI, ORCID
Novotný, T. (CZ)
Řehoř, M. (CZ)
Erban Kochergina, Y. V. (CZ)Celkový počet autorů 8 Číslo článku 11 Zdroj.dok. Geologica Acta. - : Universitat de Barcelona - ISSN 1695-6133
Roč. 19, JUL (2021)Poč.str. 29 s. Jazyk dok. eng - angličtina Země vyd. ES - Španělsko Klíč. slova Crandallite ; Isotope geochemistry ; Miocene climatic optimum ; The Most Basin Vědní obor RIV DD - Geochemie Obor OECD Environmental sciences (social aspects to be 5.7) Vědní obor RIV – spolupráce Ústav struktury a mechaniky hornin - Geologie a mineralogie Způsob publikování Open access Institucionální podpora UACH-T - RVO:61388980 ; USMH-B - RVO:67985891 UT WOS 000717139400012 EID SCOPUS 85116453973 DOI 10.1344/GeologicaActa2021.19.11 Anotace We describe the occurrence and possible origin of rare beds 1–10cm thick and containing 20–70% of crandallite, a Ca-Al phosphate enriched in Sr and Ba, found within otherwise monotonous clay-rich lacustrine sediments of the Most Basin in the Central-European Neogene Ohře Rift system. The beds were formed at ca. 17.31, 17.06, and 16.88Ma, while the entire suite of monotonous clays of the Libkovice Member was deposited between 17.46 and 16.65Ma. Trace-element and organic geochemistry, Ar-Ar geochronology and C-O-Sr isotope systematics are used to infer their source and processes leading to their formation. The most enigmatic aspect of the formation of the crandallite beds is the removal of a huge amount of phosphorus from its biogenic cycle in the lacustrine system, which was otherwise stable for ca. 0.8My. Formation of detritus-poor crandallite beds could result from some exceptional environmental disruptions that hindered transport of fine clastic material to the basin floor. Silicic volcanic activity in the area of the Pannonian Basin could have triggered this disruption. Crandallite could provide evidence of long-lasting droughts and acidification of the exogenic environment, as they are roughly coeval with the onset of the Miocene Climatic Optimum at ca. 17.0Ma. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2022 Elektronická adresa http://hdl.handle.net/11104/0323371
Počet záznamů: 1