A Continuous Seismostratigraphic Framework for the Western Svalbard-Barents Sea Margin Over the Last 2.7 Ma: Implications for the Late Cenozoic Glacial History of the Svalbard-Barents Sea Ice Sheet
International audience Here we present a high-resolution, continuous seismostratigraphic framework that for the first time, connects the over 1,000 km long western Svalbard-Barents Sea margin and covers the last ∼2.7 million years (Ma). By exploiting recent improvements in chronology, we establish a...
Published in: | Frontiers in Earth Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Online Access: | https://hal.univ-brest.fr/hal-03263849 https://doi.org/10.3389/feart.2021.656732 |
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ftanrparis:oai:HAL:hal-03263849v1 2024-09-15T17:57:41+00:00 A Continuous Seismostratigraphic Framework for the Western Svalbard-Barents Sea Margin Over the Last 2.7 Ma: Implications for the Late Cenozoic Glacial History of the Svalbard-Barents Sea Ice Sheet Alexandropoulou, Nikolitsa Winsborrow, Monica Andreassen, Karin Plaza-Faverola, Andreia Dessandier, Pierre-Antoine Mattingsdal, Rune Baeten, Nicole Knies, Jochen Laboratoire Environnement Profond (LEP) Etudes des Ecosystèmes Profonds (EEP) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Interdisciplinary Graduate School for the Blue planet ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) 2021-05-14 https://hal.univ-brest.fr/hal-03263849 https://doi.org/10.3389/feart.2021.656732 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/feart.2021.656732 hal-03263849 https://hal.univ-brest.fr/hal-03263849 doi:10.3389/feart.2021.656732 ISSN: 2296-6463 Frontiers in Earth Science https://hal.univ-brest.fr/hal-03263849 Frontiers in Earth Science, 2021, 9, pp.Article number 656732. ⟨10.3389/feart.2021.656732⟩ chronostratigraphy quaternary glacial intensification palaeo-ice streams Trough-Mouth Fan sedimentation rates Saalian Weichselian [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftanrparis https://doi.org/10.3389/feart.2021.656732 2024-07-12T11:07:32Z International audience Here we present a high-resolution, continuous seismostratigraphic framework that for the first time, connects the over 1,000 km long western Svalbard-Barents Sea margin and covers the last ∼2.7 million years (Ma). By exploiting recent improvements in chronology, we establish a set of reliable age fix-points from available boreholes along the margin. We then use a large 2-D seismic database to extend this consistent chronology from the Yermak Plateau and offshore western Svalbard, southwards to the Bear Island Trough-Mouth Fan. Based on this new stratigraphic framework we divide the seismic stratigraphy along the continental margin into three seismic units, and 12 regionally correlated seismic reflections, each with an estimated age assignment. We demonstrate one potential application of this framework by reconstructing the Svalbard-Barents Sea Ice Sheet evolution from the intensification of the northern hemisphere glaciation at ∼2.7 Ma to the Weichselian glaciations. Through seismic facies distribution and sedimentation rate fluctuations along the margin we distinguish three phases of glacial development. The higher temporal resolution provided by this new framework, allows us to document a clear two-step onset to glacial intensification in the region during phase 1, between ∼2.7 and 1.5 Ma. The initial step, between ∼2.7 and 2.58 Ma shows glacial expansion across Svalbard. The first indication of shelf-edge glaciation is on the Sjubrebanken Trough-Mouth Fan, northwestern Barents Sea after ∼2.58 Ma; whilst the second step, between ∼1.95 and 1.78 Ma shows glacial advances beyond Svalbard to the northwestern Barents Sea. Phase 2 is characterized by variations in sedimentation rates and the seismic facies are indicative for a regional glacial intensification for the whole Barents Sea-Svalbard region with widespread shelf-edge glaciations recorded at around ∼1.5 Ma. During Phase 3, the western Barents Sea margin is characterized by a dramatic increase in sedimentation rates, inferring once ... Article in Journal/Newspaper Barents Sea Bear Island Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau Portail HAL-ANR (Agence Nationale de la Recherche) Frontiers in Earth Science 9 |
institution |
Open Polar |
collection |
Portail HAL-ANR (Agence Nationale de la Recherche) |
op_collection_id |
ftanrparis |
language |
English |
topic |
chronostratigraphy quaternary glacial intensification palaeo-ice streams Trough-Mouth Fan sedimentation rates Saalian Weichselian [SDE]Environmental Sciences |
spellingShingle |
chronostratigraphy quaternary glacial intensification palaeo-ice streams Trough-Mouth Fan sedimentation rates Saalian Weichselian [SDE]Environmental Sciences Alexandropoulou, Nikolitsa Winsborrow, Monica Andreassen, Karin Plaza-Faverola, Andreia Dessandier, Pierre-Antoine Mattingsdal, Rune Baeten, Nicole Knies, Jochen A Continuous Seismostratigraphic Framework for the Western Svalbard-Barents Sea Margin Over the Last 2.7 Ma: Implications for the Late Cenozoic Glacial History of the Svalbard-Barents Sea Ice Sheet |
topic_facet |
chronostratigraphy quaternary glacial intensification palaeo-ice streams Trough-Mouth Fan sedimentation rates Saalian Weichselian [SDE]Environmental Sciences |
description |
International audience Here we present a high-resolution, continuous seismostratigraphic framework that for the first time, connects the over 1,000 km long western Svalbard-Barents Sea margin and covers the last ∼2.7 million years (Ma). By exploiting recent improvements in chronology, we establish a set of reliable age fix-points from available boreholes along the margin. We then use a large 2-D seismic database to extend this consistent chronology from the Yermak Plateau and offshore western Svalbard, southwards to the Bear Island Trough-Mouth Fan. Based on this new stratigraphic framework we divide the seismic stratigraphy along the continental margin into three seismic units, and 12 regionally correlated seismic reflections, each with an estimated age assignment. We demonstrate one potential application of this framework by reconstructing the Svalbard-Barents Sea Ice Sheet evolution from the intensification of the northern hemisphere glaciation at ∼2.7 Ma to the Weichselian glaciations. Through seismic facies distribution and sedimentation rate fluctuations along the margin we distinguish three phases of glacial development. The higher temporal resolution provided by this new framework, allows us to document a clear two-step onset to glacial intensification in the region during phase 1, between ∼2.7 and 1.5 Ma. The initial step, between ∼2.7 and 2.58 Ma shows glacial expansion across Svalbard. The first indication of shelf-edge glaciation is on the Sjubrebanken Trough-Mouth Fan, northwestern Barents Sea after ∼2.58 Ma; whilst the second step, between ∼1.95 and 1.78 Ma shows glacial advances beyond Svalbard to the northwestern Barents Sea. Phase 2 is characterized by variations in sedimentation rates and the seismic facies are indicative for a regional glacial intensification for the whole Barents Sea-Svalbard region with widespread shelf-edge glaciations recorded at around ∼1.5 Ma. During Phase 3, the western Barents Sea margin is characterized by a dramatic increase in sedimentation rates, inferring once ... |
author2 |
Laboratoire Environnement Profond (LEP) Etudes des Ecosystèmes Profonds (EEP) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Interdisciplinary Graduate School for the Blue planet ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) |
format |
Article in Journal/Newspaper |
author |
Alexandropoulou, Nikolitsa Winsborrow, Monica Andreassen, Karin Plaza-Faverola, Andreia Dessandier, Pierre-Antoine Mattingsdal, Rune Baeten, Nicole Knies, Jochen |
author_facet |
Alexandropoulou, Nikolitsa Winsborrow, Monica Andreassen, Karin Plaza-Faverola, Andreia Dessandier, Pierre-Antoine Mattingsdal, Rune Baeten, Nicole Knies, Jochen |
author_sort |
Alexandropoulou, Nikolitsa |
title |
A Continuous Seismostratigraphic Framework for the Western Svalbard-Barents Sea Margin Over the Last 2.7 Ma: Implications for the Late Cenozoic Glacial History of the Svalbard-Barents Sea Ice Sheet |
title_short |
A Continuous Seismostratigraphic Framework for the Western Svalbard-Barents Sea Margin Over the Last 2.7 Ma: Implications for the Late Cenozoic Glacial History of the Svalbard-Barents Sea Ice Sheet |
title_full |
A Continuous Seismostratigraphic Framework for the Western Svalbard-Barents Sea Margin Over the Last 2.7 Ma: Implications for the Late Cenozoic Glacial History of the Svalbard-Barents Sea Ice Sheet |
title_fullStr |
A Continuous Seismostratigraphic Framework for the Western Svalbard-Barents Sea Margin Over the Last 2.7 Ma: Implications for the Late Cenozoic Glacial History of the Svalbard-Barents Sea Ice Sheet |
title_full_unstemmed |
A Continuous Seismostratigraphic Framework for the Western Svalbard-Barents Sea Margin Over the Last 2.7 Ma: Implications for the Late Cenozoic Glacial History of the Svalbard-Barents Sea Ice Sheet |
title_sort |
continuous seismostratigraphic framework for the western svalbard-barents sea margin over the last 2.7 ma: implications for the late cenozoic glacial history of the svalbard-barents sea ice sheet |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.univ-brest.fr/hal-03263849 https://doi.org/10.3389/feart.2021.656732 |
genre |
Barents Sea Bear Island Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau |
genre_facet |
Barents Sea Bear Island Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau |
op_source |
ISSN: 2296-6463 Frontiers in Earth Science https://hal.univ-brest.fr/hal-03263849 Frontiers in Earth Science, 2021, 9, pp.Article number 656732. ⟨10.3389/feart.2021.656732⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/feart.2021.656732 hal-03263849 https://hal.univ-brest.fr/hal-03263849 doi:10.3389/feart.2021.656732 |
op_doi |
https://doi.org/10.3389/feart.2021.656732 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
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1810433827538993152 |