Sediment properties in submarine mass-transport deposits using seismic and rock-physics off NW Barents Sea
15 pages, 16 figures, 1 table, supplementary material https://doi.org/10.1016/j.margeo.2017.11.013 Submarine mass movements may have profound effects on the morphology and stratigraphic architecture of continental margins. Furthermore, they can represent a threat to human life and infrastructures, a...
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Online Access: | http://hdl.handle.net/10261/175003 https://doi.org/10.1016/j.margeo.2017.11.013 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100002809 |
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ftcsic:oai:digital.csic.es:10261/175003 2024-02-11T10:02:26+01:00 Sediment properties in submarine mass-transport deposits using seismic and rock-physics off NW Barents Sea Madrussani, Gianni Rossi, Giuliana Rebesco, Michele Picotti, Stefano Urgeles, Roger Llopart, Jaume Ministerio de Economía y Competitividad (España) Generalitat de Catalunya 2018-08 http://hdl.handle.net/10261/175003 https://doi.org/10.1016/j.margeo.2017.11.013 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100002809 unknown Elsevier https://doi.org/10.1016/j.margeo.2017.11.013 Sí doi:10.1016/j.margeo.2017.11.013 issn: 0025-3227 Marine Geology 402: 264- 278 (2018) http://hdl.handle.net/10261/175003 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100002809 open Travel-time and attenuation tomography Rock physics Mass-transport deposits NW Barents Sea margin artículo http://purl.org/coar/resource_type/c_6501 2018 ftcsic https://doi.org/10.1016/j.margeo.2017.11.01310.13039/50110000332910.13039/501100002809 2024-01-16T10:35:29Z 15 pages, 16 figures, 1 table, supplementary material https://doi.org/10.1016/j.margeo.2017.11.013 Submarine mass movements may have profound effects on the morphology and stratigraphic architecture of continental margins. Furthermore, they can represent a threat to human life and infrastructures, and also have implications for hydrocarbon exploration/production. In polar regions, they are one of the predominant sedimentary processes on the continental slope. Exploration seismology has been widely employed to study mass-transport deposits (landslides, glacigenic debris flows, mass flows, etc.), which are usually characterized by chaotic reflections. In this study, we analyse a seismic profile acquired in the southern part of the Storfjorden trough mouth fan (NW Barents Sea margin), showing the presence of two submarine mass-transport deposits (MTDs). A giant MTD (PLS-1) is located on the lower continental slope at 2.6–3 km depth, while a more recent MTD (PLS-2) occurs at 1.9–2.4 km depth. Velocity and attenuation seismic tomography, seismic attributes analyses and rock-physics models reveal distinct petrophysical properties for PLS-1 and PLS-2. Despite the known influence of burial depth(s), fluid flow content, and compaction on the internal character of MTDs, the two deposits studied here, in fact, show distinct petrophysical characteristics that reflect lithological variations - more than to any other control. These results suggest different source areas for the two MTDs. The inferred coarser sediment in PLS-1 indicates provenance from areas with abundant glacigenic debris flows, (such as the Bjørnøya Trough-Mouth Fan). Conversely, the finer, relatively fluid-rich sediments of PLS-2 that underwent little translation could have an origin in the area between trough-mouth fans. Here, slow-moving ice resulted in a relatively scarce release of subglacial debris at the shelf edge and the continental slope was subject to enhanced erosion and degradation with a comparatively higher production of relatively ... Article in Journal/Newspaper Barents Sea Bjørnøya Digital.CSIC (Spanish National Research Council) Barents Sea Bjørnøya ENVELOPE(-67.250,-67.250,-68.151,-68.151) Marine Geology 402 264 278 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Travel-time and attenuation tomography Rock physics Mass-transport deposits NW Barents Sea margin |
spellingShingle |
Travel-time and attenuation tomography Rock physics Mass-transport deposits NW Barents Sea margin Madrussani, Gianni Rossi, Giuliana Rebesco, Michele Picotti, Stefano Urgeles, Roger Llopart, Jaume Sediment properties in submarine mass-transport deposits using seismic and rock-physics off NW Barents Sea |
topic_facet |
Travel-time and attenuation tomography Rock physics Mass-transport deposits NW Barents Sea margin |
description |
15 pages, 16 figures, 1 table, supplementary material https://doi.org/10.1016/j.margeo.2017.11.013 Submarine mass movements may have profound effects on the morphology and stratigraphic architecture of continental margins. Furthermore, they can represent a threat to human life and infrastructures, and also have implications for hydrocarbon exploration/production. In polar regions, they are one of the predominant sedimentary processes on the continental slope. Exploration seismology has been widely employed to study mass-transport deposits (landslides, glacigenic debris flows, mass flows, etc.), which are usually characterized by chaotic reflections. In this study, we analyse a seismic profile acquired in the southern part of the Storfjorden trough mouth fan (NW Barents Sea margin), showing the presence of two submarine mass-transport deposits (MTDs). A giant MTD (PLS-1) is located on the lower continental slope at 2.6–3 km depth, while a more recent MTD (PLS-2) occurs at 1.9–2.4 km depth. Velocity and attenuation seismic tomography, seismic attributes analyses and rock-physics models reveal distinct petrophysical properties for PLS-1 and PLS-2. Despite the known influence of burial depth(s), fluid flow content, and compaction on the internal character of MTDs, the two deposits studied here, in fact, show distinct petrophysical characteristics that reflect lithological variations - more than to any other control. These results suggest different source areas for the two MTDs. The inferred coarser sediment in PLS-1 indicates provenance from areas with abundant glacigenic debris flows, (such as the Bjørnøya Trough-Mouth Fan). Conversely, the finer, relatively fluid-rich sediments of PLS-2 that underwent little translation could have an origin in the area between trough-mouth fans. Here, slow-moving ice resulted in a relatively scarce release of subglacial debris at the shelf edge and the continental slope was subject to enhanced erosion and degradation with a comparatively higher production of relatively ... |
author2 |
Ministerio de Economía y Competitividad (España) Generalitat de Catalunya |
format |
Article in Journal/Newspaper |
author |
Madrussani, Gianni Rossi, Giuliana Rebesco, Michele Picotti, Stefano Urgeles, Roger Llopart, Jaume |
author_facet |
Madrussani, Gianni Rossi, Giuliana Rebesco, Michele Picotti, Stefano Urgeles, Roger Llopart, Jaume |
author_sort |
Madrussani, Gianni |
title |
Sediment properties in submarine mass-transport deposits using seismic and rock-physics off NW Barents Sea |
title_short |
Sediment properties in submarine mass-transport deposits using seismic and rock-physics off NW Barents Sea |
title_full |
Sediment properties in submarine mass-transport deposits using seismic and rock-physics off NW Barents Sea |
title_fullStr |
Sediment properties in submarine mass-transport deposits using seismic and rock-physics off NW Barents Sea |
title_full_unstemmed |
Sediment properties in submarine mass-transport deposits using seismic and rock-physics off NW Barents Sea |
title_sort |
sediment properties in submarine mass-transport deposits using seismic and rock-physics off nw barents sea |
publisher |
Elsevier |
publishDate |
2018 |
url |
http://hdl.handle.net/10261/175003 https://doi.org/10.1016/j.margeo.2017.11.013 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100002809 |
long_lat |
ENVELOPE(-67.250,-67.250,-68.151,-68.151) |
geographic |
Barents Sea Bjørnøya |
geographic_facet |
Barents Sea Bjørnøya |
genre |
Barents Sea Bjørnøya |
genre_facet |
Barents Sea Bjørnøya |
op_relation |
https://doi.org/10.1016/j.margeo.2017.11.013 Sí doi:10.1016/j.margeo.2017.11.013 issn: 0025-3227 Marine Geology 402: 264- 278 (2018) http://hdl.handle.net/10261/175003 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100002809 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.margeo.2017.11.01310.13039/50110000332910.13039/501100002809 |
container_title |
Marine Geology |
container_volume |
402 |
container_start_page |
264 |
op_container_end_page |
278 |
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1790598385704632320 |