Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F14%3A10288477" target="_blank" >RIV/00216208:11310/14:10288477 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/14:00428331 RIV/61989100:27350/14:86090251

Výsledek na webu

<a href="http://dx.doi.org/10.3402/polar.v33.19714" target="_blank" >http://dx.doi.org/10.3402/polar.v33.19714</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3402/polar.v33.19714" target="_blank" >10.3402/polar.v33.19714</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia)

Popis výsledku v původním jazyce

The Jurassic/Cretaceous transition was accompanied by significant changes in palaeoceanography and palaeoenvironments in the Tethyan Realm, but outside the Tethys such data are very scarce. Here we present results of a study of the most complete sectionin the Panboreal Superrealm, the Nordvik section. Belemnite d18O data show an irregular decrease from values reaching up to +1.6 %o in the Middle Oxfordian and from +0.8 to -1.7 %o in the basal Ryazanian, indicating a prolonged warming. The biodiversitychanges were strongly related to sea-level oscillations, showing a relatively low belemnite and high ammonite diversity during sea-level rise, accompanied by a decrease of the macrobenthos taxonomical richness. The most prominent sea-level rise is markedby the occurrence of open sea ammonites with Pacific affinities. Peak abundances of spores and prasinophytes correlate with a negative excursion in organic carbon d13C near the J/K boundary and could reflect blooms of green algae caused

Název v anglickém jazyce

Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia)

Popis výsledku anglicky

The Jurassic/Cretaceous transition was accompanied by significant changes in palaeoceanography and palaeoenvironments in the Tethyan Realm, but outside the Tethys such data are very scarce. Here we present results of a study of the most complete sectionin the Panboreal Superrealm, the Nordvik section. Belemnite d18O data show an irregular decrease from values reaching up to +1.6 %o in the Middle Oxfordian and from +0.8 to -1.7 %o in the basal Ryazanian, indicating a prolonged warming. The biodiversitychanges were strongly related to sea-level oscillations, showing a relatively low belemnite and high ammonite diversity during sea-level rise, accompanied by a decrease of the macrobenthos taxonomical richness. The most prominent sea-level rise is markedby the occurrence of open sea ammonites with Pacific affinities. Peak abundances of spores and prasinophytes correlate with a negative excursion in organic carbon d13C near the J/K boundary and could reflect blooms of green algae caused

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

<a href="/cs/project/GA205%2F07%2F1365" target="_blank" >GA205/07/1365: Integrovaná statigrafie a geochemie hraničního intervalu jura/křída tethydní a boreální oblasti</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Polar Research

ISSN

0800-0395

e-ISSN

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Svazek periodika

33

Číslo periodika v rámci svazku

březen

Stát vydavatele periodika

NO - Norské království

Počet stran výsledku

19

Strana od-do

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Kód UT WoS článku

000333596900001

EID výsledku v databázi Scopus

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