Response of foraminiferal assemblages to precession-paced environmental variation in a mid-latitude seaway: Late Turonian greenhouse of Central Europe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F21%3A00546541" target="_blank" >RIV/67985530:_____/21:00546541 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/21:10434634 RIV/00025798:_____/21:00000139

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0377839821000669" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0377839821000669</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.marmicro.2021.102025" target="_blank" >10.1016/j.marmicro.2021.102025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Response of foraminiferal assemblages to precession-paced environmental variation in a mid-latitude seaway: Late Turonian greenhouse of Central Europe

Popis výsledku v původním jazyce

Foraminiferal assemblages were studied as part of a multi-proxy dataset from an expanded record of Late Turonian hemipelagic deposition obtained from the Bch-1 research borehole in the Bohemian Cretaceous Basin (Central Europe). Based on fluctuations in the Si/Al ratio, precession-paced cyclicity (18-23 kyr) is recognized in the studied interval and interpreted to reflect changes in seasonality. This study focuses on relationships between the astronomically controlled lithological cyclicity and the composition of foraminifera assemblages, together with variation in other parameters (geochemical, geophysical, palynological) that may provide further information about palaeoenvironmental change on a precession time scale. Spearman correlation enables the foraminiferal assemblages to be divided into three clusters. These clusters are interpreted to reflect palaeoenvironmental patterns that result from variation in nutrient supply and in surface water salinity, driven by changes in seasonality. The Lenticulina - Gyroidinoides - agglutinated foraminifera cluster dominated during periods of decreased seasonality and alternated with the Cibicides - spiral unkeeled planktics cluster (lower part of study interval) or the Gavellinela - Praebulimina - spiral keeled + biserial planktics cluster (upper part of study interval) coincident with the presumed seasonality maxima. Replacement of the Gavelinella cluster by the Cibicides cluster may reflect a longer-term trend of seasonality changes or changes in food supply. The observed low foraminiferal abundance and low planktic/benthic ratio during the seasonality maxima indicates that these were times of more intense rainfall, increased elastic supply and surface water turbidity, and more pronounced salinity fluctuations.

Název v anglickém jazyce

Response of foraminiferal assemblages to precession-paced environmental variation in a mid-latitude seaway: Late Turonian greenhouse of Central Europe

Popis výsledku anglicky

Foraminiferal assemblages were studied as part of a multi-proxy dataset from an expanded record of Late Turonian hemipelagic deposition obtained from the Bch-1 research borehole in the Bohemian Cretaceous Basin (Central Europe). Based on fluctuations in the Si/Al ratio, precession-paced cyclicity (18-23 kyr) is recognized in the studied interval and interpreted to reflect changes in seasonality. This study focuses on relationships between the astronomically controlled lithological cyclicity and the composition of foraminifera assemblages, together with variation in other parameters (geochemical, geophysical, palynological) that may provide further information about palaeoenvironmental change on a precession time scale. Spearman correlation enables the foraminiferal assemblages to be divided into three clusters. These clusters are interpreted to reflect palaeoenvironmental patterns that result from variation in nutrient supply and in surface water salinity, driven by changes in seasonality. The Lenticulina - Gyroidinoides - agglutinated foraminifera cluster dominated during periods of decreased seasonality and alternated with the Cibicides - spiral unkeeled planktics cluster (lower part of study interval) or the Gavellinela - Praebulimina - spiral keeled + biserial planktics cluster (upper part of study interval) coincident with the presumed seasonality maxima. Replacement of the Gavelinella cluster by the Cibicides cluster may reflect a longer-term trend of seasonality changes or changes in food supply. The observed low foraminiferal abundance and low planktic/benthic ratio during the seasonality maxima indicates that these were times of more intense rainfall, increased elastic supply and surface water turbidity, and more pronounced salinity fluctuations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA17-10982S" target="_blank" >GA17-10982S: Globální cyklus uhlíku a změny hladiny oceánu ve skleníkovém klimatu: trans-atlantická korelace sedimentárních archivů turonu (křída)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Marine Micropaleontology

ISSN

0377-8398

e-ISSN

1872-6186

Svazek periodika

167

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

18

Strana od-do

102025

Kód UT WoS článku

000687638100004

EID výsledku v databázi Scopus

2-s2.0-85111922679