Fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western Barents Sea
27 pages, 14 figures, 4 tables, supporting information https://doi.org/10.1111/bre.12331 Using a combination of geophysical and geotechnical data from Storfjorden Trough Mouth Fan off southern Svalbard, we investigate the hydrogeology of the continental margin and how this is affected by Quaternary...
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European Association of Geoscientists and Engineers
2019
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Online Access: | http://hdl.handle.net/10261/184813 https://doi.org/10.1111/bre.12331 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/100005243 |
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ftcsic:oai:digital.csic.es:10261/184813 2024-02-11T10:02:28+01:00 Fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western Barents Sea Llopart, Jaume Urgeles, Roger Forsberg, Carl Fredrick Camerlenghi, Angelo Vanneste, Maarten Rebesco, Michele Lucchi, Renata G. Rüther, Denise C. Lantzsch, Hendrik United Nations Educational, Scientific and Cultural Organization Ministerio de Economía y Competitividad (España) International Union of Geological Sciences Programma Nazionale di Ricerche in Antartide 2019-06 http://hdl.handle.net/10261/184813 https://doi.org/10.1111/bre.12331 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/100005243 unknown European Association of Geoscientists and Engineers Postprint https://doi.org/10.1111/bre.12331 Sí issn: 0950-091X e-issn: 1365-2117 Basin Research 31(3): 487-513 (2019) http://hdl.handle.net/10261/184813 doi:10.1111/bre.12331 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/100005243 open artículo http://purl.org/coar/resource_type/c_6501 2019 ftcsic https://doi.org/10.1111/bre.1233110.13039/50110000332910.13039/100005243 2024-01-16T10:40:44Z 27 pages, 14 figures, 4 tables, supporting information https://doi.org/10.1111/bre.12331 Using a combination of geophysical and geotechnical data from Storfjorden Trough Mouth Fan off southern Svalbard, we investigate the hydrogeology of the continental margin and how this is affected by Quaternary glacial advances and retreats over the continental shelf. The geotechnical results show that plumites, deposited during the deglaciation, have high porosities, permeabilities and compressibilities with respect to glacigenic debris flows and tills. These results together with margin stratigraphic models obtained from seismic reflection data were used as input for numerical finite element models to understand focusing of interstitial fluids on glaciated continental margins. The modelled evolution of the Storfjorden TMF shows that tills formed on the shelf following the onset of glacial sedimentation (ca. 1.5 Ma) acted as aquitards and therefore played a significant role in decreasing the vertical fluid flow towards the sea floor and diverting it towards the slope. The model shows that high overpressure ratios (up to λ ca. 0.6) developed below the shelf edge and on the middle slope. A more detailed model for the last 220 kyrs accounting for ice loading during glacial maxima shows that the formation of these aquitards on the shelf focused fluid flow towards the most permeable plumite sediments on the slope. The less permeable glacigenic debris flows that were deposited during glacial maxima on the slope hinder fluid evacuation from plumites allowing high overpressure ratios (up to λ ca. 0.7) to develop in the shallowest plumite layers. These high overpressures likely persist to the Present and are a critical precondition for submarine slope failure This study is funded by the ‘Ministerio Economia y Competitividad’ through grants DEGLABAR, (CTM2010‐17386), CORIBAR‐ES (CTM2011‐14807‐E) and SVAIS (POL2006‐07390). UNESCO and IUGS are also acknowledged for funding through projects IGCP‐585 and IGCP‐640. The Italian ... Article in Journal/Newspaper Barents Sea Storfjorden Svalbard Digital.CSIC (Spanish National Research Council) Svalbard Barents Sea Basin Research 31 3 487 513 |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
description |
27 pages, 14 figures, 4 tables, supporting information https://doi.org/10.1111/bre.12331 Using a combination of geophysical and geotechnical data from Storfjorden Trough Mouth Fan off southern Svalbard, we investigate the hydrogeology of the continental margin and how this is affected by Quaternary glacial advances and retreats over the continental shelf. The geotechnical results show that plumites, deposited during the deglaciation, have high porosities, permeabilities and compressibilities with respect to glacigenic debris flows and tills. These results together with margin stratigraphic models obtained from seismic reflection data were used as input for numerical finite element models to understand focusing of interstitial fluids on glaciated continental margins. The modelled evolution of the Storfjorden TMF shows that tills formed on the shelf following the onset of glacial sedimentation (ca. 1.5 Ma) acted as aquitards and therefore played a significant role in decreasing the vertical fluid flow towards the sea floor and diverting it towards the slope. The model shows that high overpressure ratios (up to λ ca. 0.6) developed below the shelf edge and on the middle slope. A more detailed model for the last 220 kyrs accounting for ice loading during glacial maxima shows that the formation of these aquitards on the shelf focused fluid flow towards the most permeable plumite sediments on the slope. The less permeable glacigenic debris flows that were deposited during glacial maxima on the slope hinder fluid evacuation from plumites allowing high overpressure ratios (up to λ ca. 0.7) to develop in the shallowest plumite layers. These high overpressures likely persist to the Present and are a critical precondition for submarine slope failure This study is funded by the ‘Ministerio Economia y Competitividad’ through grants DEGLABAR, (CTM2010‐17386), CORIBAR‐ES (CTM2011‐14807‐E) and SVAIS (POL2006‐07390). UNESCO and IUGS are also acknowledged for funding through projects IGCP‐585 and IGCP‐640. The Italian ... |
author2 |
United Nations Educational, Scientific and Cultural Organization Ministerio de Economía y Competitividad (España) International Union of Geological Sciences Programma Nazionale di Ricerche in Antartide |
format |
Article in Journal/Newspaper |
author |
Llopart, Jaume Urgeles, Roger Forsberg, Carl Fredrick Camerlenghi, Angelo Vanneste, Maarten Rebesco, Michele Lucchi, Renata G. Rüther, Denise C. Lantzsch, Hendrik |
spellingShingle |
Llopart, Jaume Urgeles, Roger Forsberg, Carl Fredrick Camerlenghi, Angelo Vanneste, Maarten Rebesco, Michele Lucchi, Renata G. Rüther, Denise C. Lantzsch, Hendrik Fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western Barents Sea |
author_facet |
Llopart, Jaume Urgeles, Roger Forsberg, Carl Fredrick Camerlenghi, Angelo Vanneste, Maarten Rebesco, Michele Lucchi, Renata G. Rüther, Denise C. Lantzsch, Hendrik |
author_sort |
Llopart, Jaume |
title |
Fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western Barents Sea |
title_short |
Fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western Barents Sea |
title_full |
Fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western Barents Sea |
title_fullStr |
Fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western Barents Sea |
title_full_unstemmed |
Fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western Barents Sea |
title_sort |
fluid flow and pore pressure development throughout the evolution of a trough mouth fan, western barents sea |
publisher |
European Association of Geoscientists and Engineers |
publishDate |
2019 |
url |
http://hdl.handle.net/10261/184813 https://doi.org/10.1111/bre.12331 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/100005243 |
geographic |
Svalbard Barents Sea |
geographic_facet |
Svalbard Barents Sea |
genre |
Barents Sea Storfjorden Svalbard |
genre_facet |
Barents Sea Storfjorden Svalbard |
op_relation |
Postprint https://doi.org/10.1111/bre.12331 Sí issn: 0950-091X e-issn: 1365-2117 Basin Research 31(3): 487-513 (2019) http://hdl.handle.net/10261/184813 doi:10.1111/bre.12331 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/100005243 |
op_rights |
open |
op_doi |
https://doi.org/10.1111/bre.1233110.13039/50110000332910.13039/100005243 |
container_title |
Basin Research |
container_volume |
31 |
container_issue |
3 |
container_start_page |
487 |
op_container_end_page |
513 |
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1790598419576782848 |