Ice-sheet dynamics through the Quaternary on the mid-Norwegian continental margin inferred from 3D seismic data
Reconstructing the evolution of ice sheets is critical to our understanding of the global environmental system, but most detailed palaeo-glaciological reconstructions have hitherto focused on the very recent history of ice sheets. Here, we present a three-dimensional (3D) reconstruction of the chang...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/262856 2024-02-04T10:00:22+01:00 Ice-sheet dynamics through the Quaternary on the mid-Norwegian continental margin inferred from 3D seismic data Montelli, A Dowdeswell, JA Ottesen, D Johansen, SE 2017-02 application/pdf https://www.repository.cam.ac.uk/handle/1810/262856 https://doi.org/10.17863/CAM.8147 eng eng Elsevier http://dx.doi.org/10.1016/j.marpetgeo.2016.12.002 Marine and Petroleum Geology https://www.repository.cam.ac.uk/handle/1810/262856 doi:10.17863/CAM.8147 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Fennoscandian Ice Sheet glacial geomorphology ice stream marine geology palaeo-glaciology seismic stratigraphy Article 2017 ftunivcam https://doi.org/10.17863/CAM.8147 2024-01-11T23:30:36Z Reconstructing the evolution of ice sheets is critical to our understanding of the global environmental system, but most detailed palaeo-glaciological reconstructions have hitherto focused on the very recent history of ice sheets. Here, we present a three-dimensional (3D) reconstruction of the changing nature of ice-sheet derived sedimentary architecture through the Quaternary Ice Age of almost 3 Ma. An extensive geophysical record documents a marine-terminating, calving Fennoscandian Ice Sheet (FIS) margin present periodically on the mid-Norwegian shelf since the beginning of the Quaternary. Spatial and temporal variability of the FIS is illustrated by the gradual development of fast-flowing ice streams and associated intensification of focused glacial erosion and sedimentation since that time. Buried subglacial landforms reveal a complex and dynamic ice sheet, with converging palaeo-ice streams and several flow-switching events that may reflect major changes in topography and basal thermal regime. Lack of major subglacial meltwater channels suggests a largely distributed drainage system beneath the marine-terminating part of the FIS. This palaeo-environmental examination of the FIS provides a useful framework for ice-sheet modelling and shows that fragmentary preservation of buried surfaces and variability of ice-sheet dynamics should be taken into account when reconstructing glacial history from spatially limited datasets. Doctoral funding for A.M. was from the Gates Cambridge Trust. Datasets were provided by the Norwegian Petroleum Directorate (NPD), and Norwegian University of Science & Technology (NTNU) from the Schlumberger Petrel Ready Database. Authors would like to thank Schlumberger® for the dataset and access to the Petrel Schlumberger® Software that was provided by NTNU Department of Geophysics and Petroleum Engineering. Article in Journal/Newspaper Fennoscandian Ice Sheet Apollo - University of Cambridge Repository |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
Fennoscandian Ice Sheet glacial geomorphology ice stream marine geology palaeo-glaciology seismic stratigraphy |
spellingShingle |
Fennoscandian Ice Sheet glacial geomorphology ice stream marine geology palaeo-glaciology seismic stratigraphy Montelli, A Dowdeswell, JA Ottesen, D Johansen, SE Ice-sheet dynamics through the Quaternary on the mid-Norwegian continental margin inferred from 3D seismic data |
topic_facet |
Fennoscandian Ice Sheet glacial geomorphology ice stream marine geology palaeo-glaciology seismic stratigraphy |
description |
Reconstructing the evolution of ice sheets is critical to our understanding of the global environmental system, but most detailed palaeo-glaciological reconstructions have hitherto focused on the very recent history of ice sheets. Here, we present a three-dimensional (3D) reconstruction of the changing nature of ice-sheet derived sedimentary architecture through the Quaternary Ice Age of almost 3 Ma. An extensive geophysical record documents a marine-terminating, calving Fennoscandian Ice Sheet (FIS) margin present periodically on the mid-Norwegian shelf since the beginning of the Quaternary. Spatial and temporal variability of the FIS is illustrated by the gradual development of fast-flowing ice streams and associated intensification of focused glacial erosion and sedimentation since that time. Buried subglacial landforms reveal a complex and dynamic ice sheet, with converging palaeo-ice streams and several flow-switching events that may reflect major changes in topography and basal thermal regime. Lack of major subglacial meltwater channels suggests a largely distributed drainage system beneath the marine-terminating part of the FIS. This palaeo-environmental examination of the FIS provides a useful framework for ice-sheet modelling and shows that fragmentary preservation of buried surfaces and variability of ice-sheet dynamics should be taken into account when reconstructing glacial history from spatially limited datasets. Doctoral funding for A.M. was from the Gates Cambridge Trust. Datasets were provided by the Norwegian Petroleum Directorate (NPD), and Norwegian University of Science & Technology (NTNU) from the Schlumberger Petrel Ready Database. Authors would like to thank Schlumberger® for the dataset and access to the Petrel Schlumberger® Software that was provided by NTNU Department of Geophysics and Petroleum Engineering. |
format |
Article in Journal/Newspaper |
author |
Montelli, A Dowdeswell, JA Ottesen, D Johansen, SE |
author_facet |
Montelli, A Dowdeswell, JA Ottesen, D Johansen, SE |
author_sort |
Montelli, A |
title |
Ice-sheet dynamics through the Quaternary on the mid-Norwegian continental margin inferred from 3D seismic data |
title_short |
Ice-sheet dynamics through the Quaternary on the mid-Norwegian continental margin inferred from 3D seismic data |
title_full |
Ice-sheet dynamics through the Quaternary on the mid-Norwegian continental margin inferred from 3D seismic data |
title_fullStr |
Ice-sheet dynamics through the Quaternary on the mid-Norwegian continental margin inferred from 3D seismic data |
title_full_unstemmed |
Ice-sheet dynamics through the Quaternary on the mid-Norwegian continental margin inferred from 3D seismic data |
title_sort |
ice-sheet dynamics through the quaternary on the mid-norwegian continental margin inferred from 3d seismic data |
publisher |
Elsevier |
publishDate |
2017 |
url |
https://www.repository.cam.ac.uk/handle/1810/262856 https://doi.org/10.17863/CAM.8147 |
genre |
Fennoscandian Ice Sheet |
genre_facet |
Fennoscandian Ice Sheet |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/262856 doi:10.17863/CAM.8147 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.8147 |
_version_ |
1789965628099002368 |