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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ftjpolarres:oai:journals.openacademia.net:article/3194 2024-06-23T07:49:46+00:00 Palaeoenvironments and palaeoceanography changes across the Jurassic/Cretaceous boundary in the Arctic realm: case study of the Nordvik section (north Siberia, Russia) Zakharov, Victor A. Rogov, Mikhail A. Dzyuba, Oksana S. Žák, Karel Košt’ák, Martin Pruner, Petr Skupien, Petr Chadima, Martin Mazuch, Martin Nikitenko, Boris L. 2014-03-25 application/pdf text/html application/epub+zip text/plain https://polarresearch.net/index.php/polar/article/view/3194 https://doi.org/10.3402/polar.v33.19714 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3194/pdf_1 https://polarresearch.net/index.php/polar/article/view/3194/html https://polarresearch.net/index.php/polar/article/view/3194/epub https://polarresearch.net/index.php/polar/article/view/3194/xml https://polarresearch.net/index.php/polar/article/view/3194 doi:10.3402/polar.v33.19714 Polar Research; Vol 33 (2014) 1751-8369 Biodiversity stable isotopes J/K boundary Arctic Realm palaeoceanography info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftjpolarres https://doi.org/10.3402/polar.v33.19714 2024-06-13T23:33:00Z 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.Keywords: Biodiversity; stable isotopes; J/K boundary; Arctic Realm; palaeoceanography(Published: 25 March 2014)Citation: Polar Research 2014, 33, 19714, http://dx.doi.org/10.3402/polar.v33.19714 Article in Journal/Newspaper Arctic Polar Research Siberia Polar Research Arctic Pacific Polar Research 33 1 19714 |
institution |
Open Polar |
collection |
Polar Research |
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ftjpolarres |
language |
English |
topic |
Biodiversity stable isotopes J/K boundary Arctic Realm palaeoceanography |
spellingShingle |
Biodiversity stable isotopes J/K boundary Arctic Realm palaeoceanography Zakharov, Victor A. Rogov, Mikhail A. Dzyuba, Oksana S. Žák, Karel Košt’ák, Martin Pruner, Petr Skupien, Petr Chadima, Martin Mazuch, Martin Nikitenko, Boris L. 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 |
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.Keywords: Biodiversity; stable isotopes; J/K boundary; Arctic Realm; palaeoceanography(Published: 25 March 2014)Citation: Polar Research 2014, 33, 19714, http://dx.doi.org/10.3402/polar.v33.19714 |
format |
Article in Journal/Newspaper |
author |
Zakharov, Victor A. Rogov, Mikhail A. Dzyuba, Oksana S. Žák, Karel Košt’ák, Martin Pruner, Petr Skupien, Petr Chadima, Martin Mazuch, Martin Nikitenko, Boris L. |
author_facet |
Zakharov, Victor A. Rogov, Mikhail A. Dzyuba, Oksana S. Žák, Karel Košt’ák, Martin Pruner, Petr Skupien, Petr Chadima, Martin Mazuch, Martin Nikitenko, Boris L. |
author_sort |
Zakharov, Victor A. |
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://polarresearch.net/index.php/polar/article/view/3194 https://doi.org/10.3402/polar.v33.19714 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Polar Research Siberia |
genre_facet |
Arctic Polar Research Siberia |
op_source |
Polar Research; Vol 33 (2014) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3194/pdf_1 https://polarresearch.net/index.php/polar/article/view/3194/html https://polarresearch.net/index.php/polar/article/view/3194/epub https://polarresearch.net/index.php/polar/article/view/3194/xml https://polarresearch.net/index.php/polar/article/view/3194 doi:10.3402/polar.v33.19714 |
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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1802640447822102528 |