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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Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media
2021
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Subjects: | |
Online Access: | https://hdl.handle.net/10037/21806 https://doi.org/10.3389/feart.2021.656732 |
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ftunivtroemsoe:oai:munin.uit.no:10037/21806 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 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 |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 |
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 intensification. Our new stratigraphic framework allows for the first time differentiation of the sediments deposited on the slope during Early Saalian (∼0.4 and 0.2 Ma), Late Saalian (∼0.2 and 0.13 Ma), and Weichselian (<∼0.123 Ma) periods, providing new insights into the Barents Sea glaciations over the last ∼0.42 Ma. |
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 |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/21806 https://doi.org/10.3389/feart.2021.656732 |
long_lat |
ENVELOPE(-67.250,-67.250,-68.151,-68.151) ENVELOPE(10.500,10.500,79.333,79.333) ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Barents Sea Bear Island Sjubrebanken Svalbard Yermak Plateau |
geographic_facet |
Barents Sea Bear Island Sjubrebanken Svalbard Yermak Plateau |
genre |
Arctic Barents Sea Bear Island Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau |
genre_facet |
Arctic Barents Sea Bear Island Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau |
op_relation |
Frontiers in Earth Science info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Alexandropoulou N, Winsborrow M, Andreassen K, Plaza-Faverola A, Dessandier P, Mattingsdal R, Baeten NJ, Knies J. 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. Frontiers in Earth Science. 2021;9:1-19 FRIDAID 1910408 doi:10.3389/feart.2021.656732 2296-6463 https://hdl.handle.net/10037/21806 |
op_rights |
openAccess Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.3389/feart.2021.656732 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
_version_ |
1766301484730810368 |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/21806 2023-05-15T14:27:39+02:00 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 2021-05-14 https://hdl.handle.net/10037/21806 https://doi.org/10.3389/feart.2021.656732 eng eng Frontiers Media Frontiers in Earth Science info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Alexandropoulou N, Winsborrow M, Andreassen K, Plaza-Faverola A, Dessandier P, Mattingsdal R, Baeten NJ, Knies J. 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. Frontiers in Earth Science. 2021;9:1-19 FRIDAID 1910408 doi:10.3389/feart.2021.656732 2296-6463 https://hdl.handle.net/10037/21806 openAccess Copyright 2021 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.3389/feart.2021.656732 2021-07-07T22:52:36Z 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 intensification. Our new stratigraphic framework allows for the first time differentiation of the sediments deposited on the slope during Early Saalian (∼0.4 and 0.2 Ma), Late Saalian (∼0.2 and 0.13 Ma), and Weichselian (<∼0.123 Ma) periods, providing new insights into the Barents Sea glaciations over the last ∼0.42 Ma. Article in Journal/Newspaper Arctic Barents Sea Bear Island Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau University of Tromsø: Munin Open Research Archive Barents Sea Bear Island ENVELOPE(-67.250,-67.250,-68.151,-68.151) Sjubrebanken ENVELOPE(10.500,10.500,79.333,79.333) Svalbard Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Frontiers in Earth Science 9 |