Constraining reducing conditions in the Prague Basin during the late Silurian Lau/Kozlowskii extinction event

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F24%3A100056" target="_blank" >RIV/60460709:41330/24:100056 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00025798:_____/24:10169266

Výsledek na webu

<a href="https://pubs.geoscienceworld.org/gsl/jgs/article-abstract/181/2/jgs2023-108/632201/Constraining-reducing-conditions-in-the-Prague?redirectedFrom=fulltext" target="_blank" >https://pubs.geoscienceworld.org/gsl/jgs/article-abstract/181/2/jgs2023-108/632201/Constraining-reducing-conditions-in-the-Prague?redirectedFrom=fulltext</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1144/jgs2023-108" target="_blank" >10.1144/jgs2023-108</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Constraining reducing conditions in the Prague Basin during the late Silurian Lau/Kozlowskii extinction event

Popis výsledku v původním jazyce

The Silurian was marked by repeated extinctions, carbon cycle volatility and significant intervals of climatic change. The most notable of these events were the Ludfordian Lau/Kozlowskii extinction and the associated Mid-Ludfordian Lau C isotope excursion, both of which have been linked to a period of global cooling and expanded reducing conditions in the global ocean. We present new data that characterize the marine palaeoredox conditions of the Prague Basin, a peri-Gondwanan terrane. We use I/Ca ratios to assess the local redox conditions in a shallow water carbonate succession and Fe speciation and redox-sensitive trace element concentrations to assess the local redox conditions of a deeper water sequence. Consistently low I/Ca values in the shallow water section suggest either persistent local low-oxygen conditions or possibly diagenetic overprinting. Fe speciation data suggest that the bottom water redox conditions in the deeper shelf setting were consistently anoxic with possible intermittent euxinia. Concentrations of redox-sensitive trace elements consistently higher than upper continental crust values also indicate persistent reducing conditions in the deeper part of the basin. These local redox proxy data from the Prague Basin, including trends in new pyrite S isotope (delta S-34(pyr)) data, are consistent with previous findings of the expansion of anoxic and/or euxinic oceanic conditions. These data, derived from a mid-palaeolatitude marine setting, fill an important gap in our current global dataset for this interval of the late Silurian.

Název v anglickém jazyce

Constraining reducing conditions in the Prague Basin during the late Silurian Lau/Kozlowskii extinction event

Popis výsledku anglicky

The Silurian was marked by repeated extinctions, carbon cycle volatility and significant intervals of climatic change. The most notable of these events were the Ludfordian Lau/Kozlowskii extinction and the associated Mid-Ludfordian Lau C isotope excursion, both of which have been linked to a period of global cooling and expanded reducing conditions in the global ocean. We present new data that characterize the marine palaeoredox conditions of the Prague Basin, a peri-Gondwanan terrane. We use I/Ca ratios to assess the local redox conditions in a shallow water carbonate succession and Fe speciation and redox-sensitive trace element concentrations to assess the local redox conditions of a deeper water sequence. Consistently low I/Ca values in the shallow water section suggest either persistent local low-oxygen conditions or possibly diagenetic overprinting. Fe speciation data suggest that the bottom water redox conditions in the deeper shelf setting were consistently anoxic with possible intermittent euxinia. Concentrations of redox-sensitive trace elements consistently higher than upper continental crust values also indicate persistent reducing conditions in the deeper part of the basin. These local redox proxy data from the Prague Basin, including trends in new pyrite S isotope (delta S-34(pyr)) data, are consistent with previous findings of the expansion of anoxic and/or euxinic oceanic conditions. These data, derived from a mid-palaeolatitude marine setting, fill an important gap in our current global dataset for this interval of the late Silurian.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA23-06198S" target="_blank" >GA23-06198S: Reakce středněpaleozoických faunistických společenstev na významné změny prostředí: studie Mulde, Lau a Chotečského eventu v pražské pánvi</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF THE GEOLOGICAL SOCIETY

ISSN

0016-7649

e-ISSN

0016-7649

Svazek periodika

181

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

17

Strana od-do

1-17

Kód UT WoS článku

001173741400002

EID výsledku v databázi Scopus

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