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	Provedor de dados ArchiMer (2) Autor Deverchere, Jacques (2) Abtout, Abdeslem (1) Albaric, J. (1) Ebinger, C. (1) Gautier, S (1) Hamai, Lamine (1) Kianji, G. (1) Msabi, M. (1) Mulibo, G. (1) Muzuka, A. (1) Perrot, Julie (1) Petit, Carole (1) Peyrat, S. (1) Plasman, M. (1) Roecker, S. (1) Tiberi, C. (1) Wambura, R. Ferdinand (1) Yelles-chaouche, Abdelkarim (1) Mais... Palavra-chave Gravity anomalies and Earth structure (2) Africa (1) Continental margins: convergent (1) Crustal structure (1) Dynamics of lithosphere and mantle (1) Intra-plate processes (1) Joint inversion (1) Lithospheric flexure (1) Seismic tomography (1) Mais... Tipo do documento Text (2) Ano 2019 (1) 2015 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Flexural behaviour of the north Algerian margin and tectonic implications ArchiMer Hamai, Lamine; Petit, Carole; Abtout, Abdeslem; Yelles-chaouche, Abdelkarim; Deverchere, Jacques. The Algerian margin formed through back-arc opening of the Algerian basin (Mediterranean Sea) resulting from the roll-back of the Tethyan slab. Recent geophysical data acquired along the Algerian margin showed evidence of active or recent compressive deformation in the basin due to the ongoing Africa-Eurasia convergence. Published data from four wide-angle seismic profiles have allowed imaging the deep structure of the Algerian margin and its adjacent basins. In this study, we converted these velocity models into density models, then into isostatic anomalies. This allowed us to image an isostatic disequilibrium (relative to a local isostasy model) reaching a maximum amplitude at the margin toe. Converting isostatic anomalies into Moho depth variations... Tipo: Text Palavras-chave: Gravity anomalies and Earth structure; Continental margins: convergent; Dynamics of lithosphere and mantle; Lithospheric flexure; Crustal structure. Ano: 2015 URL: https://archimer.ifremer.fr/doc/00639/75137/75444.pdf Lithospheric modification by extension and magmatism at the craton-orogenic boundary: North Tanzania Divergence, East Africa ArchiMer Tiberi, C.; Gautier, S; Ebinger, C.; Roecker, S.; Plasman, M.; Albaric, J.; Deverchere, Jacques; Peyrat, S.; Perrot, Julie; Wambura, R. Ferdinand; Msabi, M.; Muzuka, A.; Mulibo, G.; Kianji, G.. We present a joint analysis of newly acquired gravity and teleseismic data in the North Tanzanian Divergence, where the lithospheric break-up is at its earliest stage. The impact of a mantle upwelling in more mature branches of the East African Rift has been extensively studied at a lithospheric scale. However, few studies have been completed that relate the deep-seated mantle anomaly detected in broad regional seismic tomography with the surface deformation observed in the thick Archaean Pan-African suture zone located in North Tanzania. Our joint inversion closes the gap between local and regional geophysical studies, providing velocity and density structures from the surface down to ca. 250 km depth with new details. Our results support the idea of a... Tipo: Text Palavras-chave: Gravity anomalies and Earth structure; Africa; Joint inversion; Seismic tomography; Intra-plate processes. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00637/74944/76038.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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