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Slope morphologies offshore Dakhla (SW-Moroccan margin) ArchiMer
Benabdellouahed, Massinissa; Baltzer, Agnes; Rabineau, Marina; Aslanian, Daniel; Sahabi, Mohamed; Germond, Fabien; Loubrieu, Benoit; Biari, Youssef.
This study explores a portion of the West African margin at the junction between two well- known segments offshore Dakhla and offshore Mauritania with destructional architecture characterized by giant slides. In between these two segments, the Dakhla segment has historically been described as a constructional section. During an oceanographic Dakhla cruise (2002), high resolution seismic data, swath bathymetry and imagery were acquired around latitude 23° N, offshore Dakhla,. This new data set reveals the existence of varied and complex morphologies on the continental slope, interpreted as a "shallot-shaped" canyon, seafloor depressions or pockmarks, ridges and scarps. These morphologies are interpreted as clues of sedimentary transfers and rupture...
Tipo: Text Palavras-chave: African margin; Bathymetry; Seismic interpretation; Pockmarks; Ridges; Scarps..
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00286/39736/38214.pdf
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Étude géologique et géophysique des marges continentales passives : exemple du Zaïre et de l'Angola ArchiMer
Moulin, Maryline.
The objective of the present work is to study the formation of the passive continental margins of the Central Segment of the South Atlantic, most particularly the Congo and Angola margins. We propose a combined approach, which integrates structural constraints based on geological cross-sections (based on seismic data) and global constraints based on plate kinematic reconstructions. The structural study is based on : i) MCS and refraction data collected during the ZaiAngo programme (a joint project conducted by Ifremer and Total) ; ii) proprietary, industrial seismic data (courtesy of Total) from the Angola margin and iii) on all available seismic lines from the Africa and Brazil conjugated margins, between Walvis Ridge and the Equatorial Fracture Zones....
Tipo: Text Palavras-chave: Seismic interpretation; Evolution model; Subsidence; Kinematic reconstruction; South and Equatorial Atlantic; Continental passive margin; Interprétation sismique; Modèle d'évolution; Subsidence; Cinématique; Atlantique Sud et Equatorial; Marge continentale passive.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/these-82.pdf
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