Geochemical characterisation of belemnite rostra from North-West Bohemia (Upper Cenomanian) - A contribution to palaeoenvironmental interpretation of a peri-Tethyan shelf

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10446257" target="_blank" >RIV/00216208:11310/22:10446257 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Geochemical characterisation of belemnite rostra from North-West Bohemia (Upper Cenomanian) - A contribution to palaeoenvironmental interpretation of a peri-Tethyan shelf

Popis výsledku v původním jazyce

The Bohemian Cretaceous Basin (BCB), the largest intracontinental basin within the Bohemian Massif extends across Saxony, Bohemia, Moravia and Silesia (Čech 2011). The preserved rocks within the BCB are possibly from the Lower (?Albian) to Upper Cretaceous (Cenomanian to Santonian). We present studied rock sequences herein belonging to Oceanic Anoxic Event II (OAE II). High-resolution climate records reveal considerable changes in temperature, carbon cycling, and ocean chemistry during this climatic perturbation. A cooling phase is preserved within the English Chalk based on an invasive Boreal fauna and bulk oxygen-isotope excursions registered during the early stages of OAE II. Here we describe the occurrence and geochemical characteristics of the belemnite species Praeactinocamax plenus (Blainville, 1827) within the BCB. This Upper Cenomanian representative of fauna from the Metoicoceras geslinianum Zone is documented and morphologically well described. Its occurrence indicates the change of the palaeoenvironmental aspects, which is called Plenus Cold Event (PCE). An abundance of this species is low except the so-called Plenus-beds (calcareous siltstones). P. plenus is also characteristic in limestones, marl/limestone alternations, and had preference of shallower water environments. A phenomenon known as the Plenus Cold Event has tentatively been correlated with climatic shifts worldwide.

Název v anglickém jazyce

Geochemical characterisation of belemnite rostra from North-West Bohemia (Upper Cenomanian) - A contribution to palaeoenvironmental interpretation of a peri-Tethyan shelf

Popis výsledku anglicky

The Bohemian Cretaceous Basin (BCB), the largest intracontinental basin within the Bohemian Massif extends across Saxony, Bohemia, Moravia and Silesia (Čech 2011). The preserved rocks within the BCB are possibly from the Lower (?Albian) to Upper Cretaceous (Cenomanian to Santonian). We present studied rock sequences herein belonging to Oceanic Anoxic Event II (OAE II). High-resolution climate records reveal considerable changes in temperature, carbon cycling, and ocean chemistry during this climatic perturbation. A cooling phase is preserved within the English Chalk based on an invasive Boreal fauna and bulk oxygen-isotope excursions registered during the early stages of OAE II. Here we describe the occurrence and geochemical characteristics of the belemnite species Praeactinocamax plenus (Blainville, 1827) within the BCB. This Upper Cenomanian representative of fauna from the Metoicoceras geslinianum Zone is documented and morphologically well described. Its occurrence indicates the change of the palaeoenvironmental aspects, which is called Plenus Cold Event (PCE). An abundance of this species is low except the so-called Plenus-beds (calcareous siltstones). P. plenus is also characteristic in limestones, marl/limestone alternations, and had preference of shallower water environments. A phenomenon known as the Plenus Cold Event has tentatively been correlated with climatic shifts worldwide.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GC21-30418J" target="_blank" >GC21-30418J: Korelace pozdně křídových sedimentárních archívů severní Sibiře a střední Evropy: záznam skleníkového klimatu vysokých a středních zeměpisných šířek</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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