Temperature and isotopic composition of seawater in the epicontinental sea (Central Paratethys) during the Middle Miocene Climate Transition based on Mg/Ca, delta O-18 and delta C-13 from foraminiferal tests

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10388295" target="_blank" >RIV/00216208:11310/18:10388295 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.palaeo.2017.12.027" target="_blank" >https://doi.org/10.1016/j.palaeo.2017.12.027</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.palaeo.2017.12.027" target="_blank" >10.1016/j.palaeo.2017.12.027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature and isotopic composition of seawater in the epicontinental sea (Central Paratethys) during the Middle Miocene Climate Transition based on Mg/Ca, delta O-18 and delta C-13 from foraminiferal tests

Popis výsledku v původním jazyce

Details regarding seawater temperature and isotopic composition of seawater in the Central Paratethys, during the Miocene epoch, are not well known. Here we present an insight based on results from a combination of Mg/Ca, delta O-18 and delta C-13 on foraminifera from the shallow core (LOM-1) representing the time interval of similar to 14.4 to 14.36 Ma. Globigerinoides trilobus, Globigerina bulloides, Cibicidoides spp. and Melonis pompiliaides were chosen for analysis due to their variable ecological preferences within the water column and on the sea floor. We assessed problems concerning diagenetic alteration of foraminiferal calcite by using a single test approach when analysing delta O-18 and delta C-13. Paleotemperature ranges turned out to be comparable with modern subtropical regions with no cooling trend as was expected at this period following the Middle Miocene Climatic Optimum. However, we find an interesting offset between the benthic species temperature response that is likely related to the different life-strategies of those species. Based on a combination of mentioned proxies it was possible to partly reconstruct delta O-18(seawater) for the studied locality and compare it with Mg/Ca derived temperature to obtain a possible correlation between temperature and salinity. We also investigated differences in surface and bottom water hydrography in comparison with the Mediterranean, and distinguish their different hydrographies. In addition, it was possible to identify dissimilar origins of surface and bottom water masses based on comparison of their isotopic composition.

Název v anglickém jazyce

Temperature and isotopic composition of seawater in the epicontinental sea (Central Paratethys) during the Middle Miocene Climate Transition based on Mg/Ca, delta O-18 and delta C-13 from foraminiferal tests

Popis výsledku anglicky

Details regarding seawater temperature and isotopic composition of seawater in the Central Paratethys, during the Miocene epoch, are not well known. Here we present an insight based on results from a combination of Mg/Ca, delta O-18 and delta C-13 on foraminifera from the shallow core (LOM-1) representing the time interval of similar to 14.4 to 14.36 Ma. Globigerinoides trilobus, Globigerina bulloides, Cibicidoides spp. and Melonis pompiliaides were chosen for analysis due to their variable ecological preferences within the water column and on the sea floor. We assessed problems concerning diagenetic alteration of foraminiferal calcite by using a single test approach when analysing delta O-18 and delta C-13. Paleotemperature ranges turned out to be comparable with modern subtropical regions with no cooling trend as was expected at this period following the Middle Miocene Climatic Optimum. However, we find an interesting offset between the benthic species temperature response that is likely related to the different life-strategies of those species. Based on a combination of mentioned proxies it was possible to partly reconstruct delta O-18(seawater) for the studied locality and compare it with Mg/Ca derived temperature to obtain a possible correlation between temperature and salinity. We also investigated differences in surface and bottom water hydrography in comparison with the Mediterranean, and distinguish their different hydrographies. In addition, it was possible to identify dissimilar origins of surface and bottom water masses based on comparison of their isotopic composition.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Palaeogeography, Palaeoclimatology, Palaeoecology

ISSN

0031-0182

e-ISSN

—

Svazek periodika

495

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

60-71

Kód UT WoS článku

000427344400006

EID výsledku v databázi Scopus

2-s2.0-85041631489