Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Geophysical Journal International 65-77 Image processing Continental margins: convergent Continental margins: divergent Africa Europe LIBYE MEDITERRANEE 2011 fdi:010053415 ENG Geophysical Journal International 0956-540X ISI:000288455500004 1 10.1111/j.1365-246X.2011.04928.x https://www.documentation.ird.fr/hor/fdi:010053415 https://www.documentation.ird.fr/intranet/publi/2011/04/010053415.pdf 185 Horizon (IRD) Off northwest Libya the Cyrenaica foreland basin domain and its Pan-African continental crust, which constitute the African promontory, are overthrusted by the Mediterranean Ridge Complex. The thrust belt contact and its seismic stratigraphy have been analysed using pre-stack depth-migrated multichannel seismic (MCS) lines recorded during the MEDISIS survey (2002). The geometry and sedimentary distribution analysis through the wedge-top depocentres allow reconstruction of schematic cross-sections of the tectono-sedimentary wedge that includes two major thrust sequences separated by an apparently poorly deformed transition zone. Based on time-space variation of several piggyback basins, we propose that these thrust sequences relate to distinct phases of shortening. (1) A first event, which probably occurred just prior to the Messinian crisis in latest Miocene (Tortonian times?) and (2) A second event, that has finally led to the present-day overthrusting of the Mediterranean Ridge over the Libyan continental slope. 066 UR082 Cameroun