Post-rift uplift of the Dhofar margin (Gulf of Aden)

François Bache (1) , Sylvie Leroy (1) , Céline Beaurion (1) , Jérémy Robinet (1, 2) , Christian Gorini (1) , F. Lucazeau (3) , P. Razin (2) , Elia d'Acremont (1) , K. Al-Toubi (4)

1 iSTeP - Institut des Sciences de la Terre de Paris
2 EGID - Environnement, Géo-ingénierie et Développement
3 IPGP - Institut de Physique du Globe de Paris
4 Earthquake Monitoring Center

An investigation of the sedimentation pattern along the Dhofar margin allows us to describe its late-stage evolution. After the accumulation of a thick post-rift sedimentary succession, two debris flow events occurred at the foot of the slope. The first event, affecting a wide area of the margin, marks a major change in sedimentation. The second event is associated with a shift of sedimentary deposition from the slope toward the basin. This latter debris flow was caused by an uplift phase, and highlights two distinct deformational styles in the eastern and western part of the Dhofar margin. Both events occurred very late in the history of the margin, at least 7.6 Ma after the end of the rifting phase (35-17.6 Ma).

Domaines: Sciences de la Terre

François Bache, Sylvie Leroy, Céline Beaurion, Jérémy Robinet, Christian Gorini, et al.. Post-rift uplift of the Dhofar margin (Gulf of Aden). Terra Nova, 2011, 23, pp.11-18. ⟨10.1111/j.1365-3121.2010.00975.x⟩. ⟨hal-00577734⟩