Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia)
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 section in the Panboreal Superrealm, the Nordvik secti...
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Norwegian Polar Institute
2014
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Online Access: | https://doi.org/10.3402/polar.v33.19714 https://doaj.org/article/97bb5ba64e3c4536a931357ee98b1812 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:97bb5ba64e3c4536a931357ee98b1812 2023-05-15T14:56:08+02:00 Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia) Victor A. Zakharov Mikhail A. Rogov Oksana S. Dzyuba Karel Žák Martin Košt’ák Petr Pruner Petr Skupien Martin Chadima Martin Mazuch Boris L. Nikitenko 2014-03-01 https://doi.org/10.3402/polar.v33.19714 https://doaj.org/article/97bb5ba64e3c4536a931357ee98b1812 en eng Norwegian Polar Institute 0800-0395 1751-8369 doi:10.3402/polar.v33.19714 https://doaj.org/article/97bb5ba64e3c4536a931357ee98b1812 undefined Polar Research, Vol 33, Iss 0, Pp 1-19 (2014) Biodiversity stable isotopes J/K boundary Arctic Realm palaeoceanography geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.3402/polar.v33.19714 2023-01-22T18:19:42Z 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 section in the Panboreal Superrealm, the Nordvik section. Belemnite δ18O data show an irregular decrease from values reaching up to +1.6‰ in the Middle Oxfordian and from +0.8 to −1.7‰ in the basal Ryazanian, indicating a prolonged warming. The biodiversity changes 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 marked by the occurrence of open sea ammonites with Pacific affinities. Peak abundances of spores and prasinophytes correlate with a negative excursion in organic carbon δ13C near the J/K boundary and could reflect blooms of green algae caused by disturbance of the marine ecosystem. Article in Journal/Newspaper Arctic Polar Research Siberia Unknown Arctic Pacific Polar Research 33 1 19714 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Biodiversity stable isotopes J/K boundary Arctic Realm palaeoceanography geo |
spellingShingle |
Biodiversity stable isotopes J/K boundary Arctic Realm palaeoceanography geo Victor A. Zakharov Mikhail A. Rogov Oksana S. Dzyuba Karel Žák Martin Košt’ák Petr Pruner Petr Skupien Martin Chadima Martin Mazuch Boris L. Nikitenko Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia) |
topic_facet |
Biodiversity stable isotopes J/K boundary Arctic Realm palaeoceanography geo |
description |
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 section in the Panboreal Superrealm, the Nordvik section. Belemnite δ18O data show an irregular decrease from values reaching up to +1.6‰ in the Middle Oxfordian and from +0.8 to −1.7‰ in the basal Ryazanian, indicating a prolonged warming. The biodiversity changes 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 marked by the occurrence of open sea ammonites with Pacific affinities. Peak abundances of spores and prasinophytes correlate with a negative excursion in organic carbon δ13C near the J/K boundary and could reflect blooms of green algae caused by disturbance of the marine ecosystem. |
format |
Article in Journal/Newspaper |
author |
Victor A. Zakharov Mikhail A. Rogov Oksana S. Dzyuba Karel Žák Martin Košt’ák Petr Pruner Petr Skupien Martin Chadima Martin Mazuch Boris L. Nikitenko |
author_facet |
Victor A. Zakharov Mikhail A. Rogov Oksana S. Dzyuba Karel Žák Martin Košt’ák Petr Pruner Petr Skupien Martin Chadima Martin Mazuch Boris L. Nikitenko |
author_sort |
Victor A. Zakharov |
title |
Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia) |
title_short |
Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia) |
title_full |
Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia) |
title_fullStr |
Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia) |
title_full_unstemmed |
Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia) |
title_sort |
palaeoenvironments and palaeoceanography changes across the jurassic/cretaceous boundary in the arctic realm: case study of the nordvik section (north siberia, russia) |
publisher |
Norwegian Polar Institute |
publishDate |
2014 |
url |
https://doi.org/10.3402/polar.v33.19714 https://doaj.org/article/97bb5ba64e3c4536a931357ee98b1812 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Polar Research Siberia |
genre_facet |
Arctic Polar Research Siberia |
op_source |
Polar Research, Vol 33, Iss 0, Pp 1-19 (2014) |
op_relation |
0800-0395 1751-8369 doi:10.3402/polar.v33.19714 https://doaj.org/article/97bb5ba64e3c4536a931357ee98b1812 |
op_rights |
undefined |
op_doi |
https://doi.org/10.3402/polar.v33.19714 |
container_title |
Polar Research |
container_volume |
33 |
container_issue |
1 |
container_start_page |
19714 |
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1766328169273491456 |