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	Provedor de dados 5 (3) Autor Watremez, Louise (3) Leroy, Sylvie (2) Al-lazki, A. (1) Aslanian, Daniel (1) Cannat, Mathilde (1) D'Acremont, E. (1) De Clarens, Philippe (1) Ebinger, C. (1) Evain, Mikael (1) Lepretre, Angelique (1) Lucazeau, F. (1) Momoh, Ekeabino (1) Moulin, Maryline (1) Rouzo, Stephane (1) Schnurle, Philippe (1) Singh, Satish C. (1) Thompson, Joseph Offei (1) Unternehr, P. (1) Verrier, Fanny (1) Mais... Palavra-chave 3-D seismic (1) Amagmatic (1) Continental margins: divergent (1) Controlled source seismology (1) Crustal structure (1) Damage zone (1) Detachment fault (1) Indian Ocean (1) Tomography (1) Ultraslow mid-ocean ridge (1) Mais... Tipo do documento Text (3) Ano 2021 (1) 2017 (1) 2011 (1) País France (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Crustal structure of the East-African Limpopo Margin, a strike-slip rifted corridor along the continental Mozambique Coastal Plain and North-Natal Valley 5 Evain, Mikael; Schnurle, Philippe; Lepretre, Angelique; Verrier, Fanny; Watremez, Louise; Thompson, Joseph Offei; De Clarens, Philippe; Aslanian, Daniel; Moulin, Maryline. Deep seismic acquisitions and a new kinematic study recently highlighted the presence of continental crust in both the southern Mozambique's Coastal Plain (MCP) and further offshore in the North Natal Valley (NNV). Such findings falsify previous geodynamic scenarios based on the kinematic overlap between Antarctica and Africa plates, thus profoundly impacting our understanding East-Gondwana break-up. Using an updated position of Antarctica with respect to Africa this study reconsider the formation mechanism of East-African margins and most specifically of the Limpopo margin (LM). Coincident wide-angle and multi-channel seismic data acquired within the PAMELA project are processed to image the sedimentary and deep crustal structure along a profile that runs... Tipo: Text Ano: 2021 URL: https://archimer.ifremer.fr/doc/00678/79004/81397.pdf Quasi-3D seismic reflection imaging, and wide-angle velocity structure of nearly amagmatic oceanic lithosphere at the ultra-slow spreading Southwest Indian Ridge 5 Momoh, Ekeabino; Cannat, Mathilde; Watremez, Louise; Leroy, Sylvie; Singh, Satish C.. We present results from 3D processing of 2D seismic data shot along 100 m-spaced profiles in a 1.8 km wide by 24 km long box during the SISMOSMOOTH 2014 cruise. The study is aimed at understanding the oceanic crust formed at an end-member mid-ocean ridge environment of nearly zero melt supply. Three distinct packages of reflectors are imaged: (1) south-facing reflectors which we propose correspond to the damage zone induced by the active axial detachment fault. Reflectors in the damage zone have dips up to 60° and are visible down to 5 km below the seafloor; (2) series of north-dipping reflectors in the hanging wall of the detachment fault. These reflectors may correspond to damage zone inherited from a previous, north-dipping detachment fault, or small... Tipo: Text Palavras-chave: Amagmatic; Ultraslow mid-ocean ridge; 3-D seismic; Tomography; Detachment fault; Damage zone. Ano: 2017 URL: https://archimer.ifremer.fr/doc/00411/52215/52943.pdf The crustal structure of the north-eastern Gulf of Aden continental margin: insights from wide-angle seismic data 5 Watremez, Louise; Leroy, Sylvie; Rouzo, Stephane; D'Acremont, E.; Unternehr, P.; Ebinger, C.; Lucazeau, F.; Al-lazki, A.. P>The wide-angle seismic (WAS) and gravity data of the Encens survey allow us to determine the deep crustal structure of the north-eastern Gulf of Aden non-volcanic passive margin. The Gulf of Aden is a young oceanic basin that began to open at least 17.6 Ma ago. Its current geometry shows first- and second-order segmentation: our study focusses on the Ashawq-Salalah second-order segment, between Alula-Fartak and Socotra-Hadbeen fracture zones. Modelling of the WAS and gravity data (three profiles across and three along the margin) gives insights into the first- and second-order structures. (1) Continental thinning is abrupt (15-20 km thinning across 50-100 km distance). It is accommodated by several tilted blocks. (2) The ocean-continent transition... Tipo: Text Palavras-chave: Controlled source seismology; Continental margins: divergent; Crustal structure; Indian Ocean. Ano: 2011 URL: http://archimer.ifremer.fr/doc/00200/31102/29507.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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