An imprint of the middle Miocene paleoceanologic and paleoclimatic events in a satellite sea during the Langhian: A case study from the Central Paratethys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15410%2F19%3A73596336" target="_blank" >RIV/61989592:15410/19:73596336 - isvavai.cz</a>

Výsledek na webu

<a href="http://geo.sav.sk/files/GC70_abstractbook.pdf" target="_blank" >http://geo.sav.sk/files/GC70_abstractbook.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

An imprint of the middle Miocene paleoceanologic and paleoclimatic events in a satellite sea during the Langhian: A case study from the Central Paratethys

Popis výsledku v původním jazyce

The Langhian Central Paratethys sea represents a unique marine environment influenced by many factors as global climatic events, the middle Langhian closure of the Indian-Mediterranean Gateway and the local tectonic events. The multiproxy paleontological and geochemical data confirmed an anti-estuarine circulation regime as the basic circulation pattern during the Langhian. This is supported by a similarity in hydrography of surficial waters (surface mixed layer) between the Paratethys and the Mediterranean Sea which is even more apparent in the upper Langhian. It evokes gradually increased inflow of warm surface water to the Paratethys which might increase terrestrial temperatures. This could explain the delayed onset of cooling after the Middle Miocene Climatic Optimum in the study area. The significant differences between the Burdigalian and Langhian terrestrial climate were recorded only in seasonality of precipitation what might suggest establishment of the monsoon-like climate due to e.g. formation of the Carpathian mountain ridge. Nevertheless, the isotopic data comparison revealed differences regarding the bottom waters, pointing to an existence of the Paratethyan bottom waters especially during the lower Langhian. In the upper Langhian, specificity of this water decreased. We explain this fact by regional shallowing which restricted formation of the Paratethyan bottom water and enabled their substitution by a derivative originating from the intensive inflowing of the Mediterranean surficial waters. This shallowing can be correlated with global Ser-1 sea-level fall. In the study area, the sea-level fall is accompanying by occurrence of euryhaline assemblages what evokes its possible correlation with the Wieliczkian Salinity Crisis. The cyclical changes triggered by Milankovitch processes are clearly pronounced in both marine and terrestrial biotops. In marine realm, the cyclical changes reflected variation in intensity of primary productivity which might be connected with cyclical changes of intensity of water masses circulation.

Název v anglickém jazyce

An imprint of the middle Miocene paleoceanologic and paleoclimatic events in a satellite sea during the Langhian: A case study from the Central Paratethys

Popis výsledku anglicky

The Langhian Central Paratethys sea represents a unique marine environment influenced by many factors as global climatic events, the middle Langhian closure of the Indian-Mediterranean Gateway and the local tectonic events. The multiproxy paleontological and geochemical data confirmed an anti-estuarine circulation regime as the basic circulation pattern during the Langhian. This is supported by a similarity in hydrography of surficial waters (surface mixed layer) between the Paratethys and the Mediterranean Sea which is even more apparent in the upper Langhian. It evokes gradually increased inflow of warm surface water to the Paratethys which might increase terrestrial temperatures. This could explain the delayed onset of cooling after the Middle Miocene Climatic Optimum in the study area. The significant differences between the Burdigalian and Langhian terrestrial climate were recorded only in seasonality of precipitation what might suggest establishment of the monsoon-like climate due to e.g. formation of the Carpathian mountain ridge. Nevertheless, the isotopic data comparison revealed differences regarding the bottom waters, pointing to an existence of the Paratethyan bottom waters especially during the lower Langhian. In the upper Langhian, specificity of this water decreased. We explain this fact by regional shallowing which restricted formation of the Paratethyan bottom water and enabled their substitution by a derivative originating from the intensive inflowing of the Mediterranean surficial waters. This shallowing can be correlated with global Ser-1 sea-level fall. In the study area, the sea-level fall is accompanying by occurrence of euryhaline assemblages what evokes its possible correlation with the Wieliczkian Salinity Crisis. The cyclical changes triggered by Milankovitch processes are clearly pronounced in both marine and terrestrial biotops. In marine realm, the cyclical changes reflected variation in intensity of primary productivity which might be connected with cyclical changes of intensity of water masses circulation.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the Geologica Carpathica 70 Conference

ISBN

978-80-85754-42-1

ISSN

1335-0552

e-ISSN

1336-8052

Počet stran výsledku

4

Strana od-do

126-129

Název nakladatele

Earth Science Institute of the Slovak Academy of Sciences

Místo vydání

Bratislava

Místo konání akce

Smolenice

Datum konání akce

9. 10. 2019

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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