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
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 fi...
Published in: | Frontiers in Earth Science |
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Online Access: | http://dx.doi.org/10.3389/feart.2021.656732 https://www.frontiersin.org/articles/10.3389/feart.2021.656732/full |
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crfrontiers:10.3389/feart.2021.656732 2024-05-12T08:01:38+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 Norges Forskningsråd 2021 http://dx.doi.org/10.3389/feart.2021.656732 https://www.frontiersin.org/articles/10.3389/feart.2021.656732/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 9 ISSN 2296-6463 General Earth and Planetary Sciences journal-article 2021 crfrontiers https://doi.org/10.3389/feart.2021.656732 2024-04-18T07:55:37Z 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 again a regional glacial ... Article in Journal/Newspaper Barents Sea Bear Island Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau Frontiers (Publisher) Svalbard Barents Sea Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Bear Island ENVELOPE(-67.250,-67.250,-68.151,-68.151) Sjubrebanken ENVELOPE(10.500,10.500,79.333,79.333) Frontiers in Earth Science 9 |
institution |
Open Polar |
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Frontiers (Publisher) |
op_collection_id |
crfrontiers |
language |
unknown |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary 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 |
General Earth and Planetary Sciences |
description |
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 again a regional glacial ... |
author2 |
Norges Forskningsråd |
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 |
Frontiers Media SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/feart.2021.656732 https://www.frontiersin.org/articles/10.3389/feart.2021.656732/full |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) ENVELOPE(-67.250,-67.250,-68.151,-68.151) ENVELOPE(10.500,10.500,79.333,79.333) |
geographic |
Svalbard Barents Sea Yermak Plateau Bear Island Sjubrebanken |
geographic_facet |
Svalbard Barents Sea Yermak Plateau Bear Island Sjubrebanken |
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 |
Frontiers in Earth Science volume 9 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2021.656732 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
_version_ |
1798843743300747264 |