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Geosciences -Environnement- Toulouse |  |
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Geosciences -Environnement- Toulouse | |
| HAL: insu-00682067, version 1 |
| DOI: 10.1007/978-94-007-2162-3_30 |
| Detailed view |  Export this paper |
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| Submarine Mass Movements and Their Consequences, Yasuhiro Yamada, Kiichiro Kawamura, Ken Ikehara, Yujiro Ogawa, Roger Urgeles, David Mosher, Jason Chaytor and Michael Strasser (Ed.) (2012) pp.331-339 |
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| Mass Movements in a Transform Margin Setting: The Example of the Eastern Demerara Rise |
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| France Pattier 1, 2Lies Loncke 2 |
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| (2012) |
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| The eastern Demerara Rise located offshore French Guiana was surveyed in 2003 (GUYAPLAC cruise, part of the French EXTRAPLAC program) using multibeam bathymetry and imagery, 6-channel seismic data and 3-5 kHz echosounding. Analysis of seismic data shows that the flank of the Demerara Rise endures repetitive sliding of its Paleogene to Neogene sedimentary cover towards the ocean. Fluid escapes seem to be closely associated with the activity of those slides and deep faults seems to impact the location of the main headscarp. We suspect fluid overpressures and the specific architecture of transform boundaries ("free border") to be key parameters in the development of wide MTD's retrogressively eroding the eastern Demerara Rise. |
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| 1: | Géosciences Marines |
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Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
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| 2: | Centre de formation et de recherche sur l'environnement marin (CEFREM) |
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CNRS : UMR5110 – INSU – Université de Perpignan |
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| 3: | Géosystèmes |
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Université Lille I - Sciences et technologies – CNRS : FRE3298 |
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| 4: | Laboratoire des Mécanismes et Transfert en Géologie (LMTG) |
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CNRS : UMR5563 – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III – Institut de recherche pour le développement [IRD] : UMR154 |
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| 5: | Institut des sciences de la Terre (ISTerre) |
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CNRS : UMR5275 – IFSTTAR – Université de Savoie – Université Joseph Fourier - Grenoble I – INSU – OSUG – Institut de recherche pour le développement [IRD] : UR219 |
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| Tectonique reliefs et bassins |
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| subject | : | Sciences of the Universe/Earth Sciences/Geomorphology |
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| Transform margin – MTD's – Demerara Rise – Fluid escapes |
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| insu-00682067, version 1 | |
| http://hal-insu.archives-ouvertes.fr/insu-00682067 | |
| oai:hal-insu.archives-ouvertes.fr:insu-00682067 | |
| From: Pascale Talour | |
| Submitted on: Friday, 23 March 2012 13:39:12 | |
| Updated on: Friday, 23 March 2012 13:39:12 | |
