Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area
Accepted manuscript version. Published version available at https://doi.org/10.1016/j.margeo.2018.03.002 . Accepted manuscript version, licensed CC BY-NC-ND 4.0. Recent developments in seismic acquisition systems and seismic data visualization have contributed to improve the imaging of seismic geomo...
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Online Access: | https://hdl.handle.net/10037/13354 https://doi.org/10.1016/j.margeo.2018.03.002 |
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ftunivtroemsoe:oai:munin.uit.no:10037/13354 2023-05-15T14:27:45+02:00 Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area Bellwald, Benjamin Planke, Sverre Piasecka, Emilia Daria Matar, M.A. Andreassen, Karin 2018-03-07 https://hdl.handle.net/10037/13354 https://doi.org/10.1016/j.margeo.2018.03.002 eng eng Elsevier Marine Geology info:eu-repo/grantAgreement/EC/FP7-PEOPLE/317217/EU/GLANAM (Glaciated North Atlantic Margins)/GLANAM/ info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Bellwald, B., Planke, S., Piasecka, E.D., Matar, M.A. & Andreassen, K. (2018). Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area. Marine Geology, 402, 165-183. https://doi.org/10.1016/j.margeo.2018.03.002 FRIDAID 1573780 doi:10.1016/j.margeo.2018.03.002 0025-3227 1872-6151 https://hdl.handle.net/10037/13354 openAccess VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 High-resolution 3D seismic Barents Sea Shear margin moraine Mega-scale glacial lineations Iceberg ploughmarks Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe https://doi.org/10.1016/j.margeo.2018.03.002 2021-06-25T17:55:51Z Accepted manuscript version. Published version available at https://doi.org/10.1016/j.margeo.2018.03.002 . Accepted manuscript version, licensed CC BY-NC-ND 4.0. Recent developments in seismic acquisition systems and seismic data visualization have contributed to improve the imaging of seismic geomorphologies over a broad range of topics. This study focuses on a new high-resolution P-Cable 3D seismic cube located in the Hoop area in the SW Barents Sea. The scientific motivations of the study are (1) to document glacial landforms on a meter-scale, (2) to study the link of these landforms with the subsurface, and (3) to understand ice-stream dynamics by detailed interpretation of main horizons, including the seabed, intra-glacial horizons, and Upper Regional Unconformity (URU). The horizons are assessed using the concept of seismic geomorphology, and compared with interpretations derived from conventional 3D seismic and state-of-the-art multibeam echosounder technologies to discuss the benefits and limitations of the different geophysical technologies. A well-defined intra-glacial seismic reflection is imaged in the eastern part of the P-Cable cube. This reflection has an overall NE-trending ridge-shaped morphology, which is up to 50 m high and 5–10 km wide, and interpreted as a shear margin moraine. The top of the moraine displays well-defined iceberg ploughmarks and clear slope failure events along its eastern flank. The seabed geomorphology, which has been directly shaped by glacial processes related to multiple phases of ice streaming, appears to be influenced by the buried shear margin moraine. Mega-scale glacial lineations (MSGLs) indicative of fast-flowing ice streams characterize the seabed west of the moraine. Infilled MSGLs and different sets of iceberg ploughmarks with large berms dominate the seabed geomorphology above the moraine. The seabed east of the moraine, characterized by a smooth morphology and few pockmarks, is inferred to reflect more slowly-moving ice. Not resolved by other geophysical techniques, seismic attribute maps of P-Cable 3D allowed the identification of smaller ploughmarks and corrugated ridges related to paleo tides. Eroded by the larger iceberg ploughmarks, these small ploughmarks are suggested to be linked to an earlier rapid disintegration of the Barents Sea Ice Stream. The new high-resolution 3D seismic data have led to the development of a revised ice-stream model of the Barents Sea, linking the glacial deposits to different ice stream events. Article in Journal/Newspaper Arctic Barents Sea Sea ice University of Tromsø: Munin Open Research Archive Barents Sea Marine Geology 402 165 183 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 High-resolution 3D seismic Barents Sea Shear margin moraine Mega-scale glacial lineations Iceberg ploughmarks |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 High-resolution 3D seismic Barents Sea Shear margin moraine Mega-scale glacial lineations Iceberg ploughmarks Bellwald, Benjamin Planke, Sverre Piasecka, Emilia Daria Matar, M.A. Andreassen, Karin Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 High-resolution 3D seismic Barents Sea Shear margin moraine Mega-scale glacial lineations Iceberg ploughmarks |
description |
Accepted manuscript version. Published version available at https://doi.org/10.1016/j.margeo.2018.03.002 . Accepted manuscript version, licensed CC BY-NC-ND 4.0. Recent developments in seismic acquisition systems and seismic data visualization have contributed to improve the imaging of seismic geomorphologies over a broad range of topics. This study focuses on a new high-resolution P-Cable 3D seismic cube located in the Hoop area in the SW Barents Sea. The scientific motivations of the study are (1) to document glacial landforms on a meter-scale, (2) to study the link of these landforms with the subsurface, and (3) to understand ice-stream dynamics by detailed interpretation of main horizons, including the seabed, intra-glacial horizons, and Upper Regional Unconformity (URU). The horizons are assessed using the concept of seismic geomorphology, and compared with interpretations derived from conventional 3D seismic and state-of-the-art multibeam echosounder technologies to discuss the benefits and limitations of the different geophysical technologies. A well-defined intra-glacial seismic reflection is imaged in the eastern part of the P-Cable cube. This reflection has an overall NE-trending ridge-shaped morphology, which is up to 50 m high and 5–10 km wide, and interpreted as a shear margin moraine. The top of the moraine displays well-defined iceberg ploughmarks and clear slope failure events along its eastern flank. The seabed geomorphology, which has been directly shaped by glacial processes related to multiple phases of ice streaming, appears to be influenced by the buried shear margin moraine. Mega-scale glacial lineations (MSGLs) indicative of fast-flowing ice streams characterize the seabed west of the moraine. Infilled MSGLs and different sets of iceberg ploughmarks with large berms dominate the seabed geomorphology above the moraine. The seabed east of the moraine, characterized by a smooth morphology and few pockmarks, is inferred to reflect more slowly-moving ice. Not resolved by other geophysical techniques, seismic attribute maps of P-Cable 3D allowed the identification of smaller ploughmarks and corrugated ridges related to paleo tides. Eroded by the larger iceberg ploughmarks, these small ploughmarks are suggested to be linked to an earlier rapid disintegration of the Barents Sea Ice Stream. The new high-resolution 3D seismic data have led to the development of a revised ice-stream model of the Barents Sea, linking the glacial deposits to different ice stream events. |
format |
Article in Journal/Newspaper |
author |
Bellwald, Benjamin Planke, Sverre Piasecka, Emilia Daria Matar, M.A. Andreassen, Karin |
author_facet |
Bellwald, Benjamin Planke, Sverre Piasecka, Emilia Daria Matar, M.A. Andreassen, Karin |
author_sort |
Bellwald, Benjamin |
title |
Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area |
title_short |
Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area |
title_full |
Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area |
title_fullStr |
Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area |
title_full_unstemmed |
Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area |
title_sort |
ice-stream dynamics of the sw barents sea revealed by high-resolution 3d seismic imaging of glacial deposits in the hoop area |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/13354 https://doi.org/10.1016/j.margeo.2018.03.002 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Arctic Barents Sea Sea ice |
genre_facet |
Arctic Barents Sea Sea ice |
op_relation |
Marine Geology info:eu-repo/grantAgreement/EC/FP7-PEOPLE/317217/EU/GLANAM (Glaciated North Atlantic Margins)/GLANAM/ info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Bellwald, B., Planke, S., Piasecka, E.D., Matar, M.A. & Andreassen, K. (2018). Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area. Marine Geology, 402, 165-183. https://doi.org/10.1016/j.margeo.2018.03.002 FRIDAID 1573780 doi:10.1016/j.margeo.2018.03.002 0025-3227 1872-6151 https://hdl.handle.net/10037/13354 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1016/j.margeo.2018.03.002 |
container_title |
Marine Geology |
container_volume |
402 |
container_start_page |
165 |
op_container_end_page |
183 |
_version_ |
1766301651028672512 |