%0 Journal Article %T Large-scale flexuring and antithetic extensional faulting along a nascent plate boundary in the SE Afar rift %+ Domaines Océaniques (LDO) %+ Institut Des Sciences de la Terre %A Le Gall, Bernard %A Daoud, Mohamed Ahmed %A Rolet, Joël %A Moussa Egueh, Nima %Z CERD and MAWARI program %Z The definitive version is available at www.blackwell-synergy.com %< avec comité de lecture %@ 0954-4879 %J Terra Nova %I Wiley-Blackwell %V 23 %N 6 %P 416-420 %8 2011-10-18 %D 2011 %R 10.1111/j.1365-3121.2011.01029.x %Z Sciences of the Universe [physics]/Earth Sciences/Tectonics %Z Environmental Sciences/Global ChangesJournal articles %X New structural data from the SE Afar margin in Djibouti lead us to discriminate two recent (<1 Ma) extensional fault networks between the Afar accreted crust, and the South Danakil block to the east. Emphasis is placed on the N-S-oriented Makarassou fault system which dissects the prominent westward-(riftward-)facing topographic flexure between the two structural domains. The most striking characteristic of the Makarassou fault belt is a closely spaced network of continentward-dipping extensional faults, bounding domino blocks of 3-1 Ma tilted lavas of the Stratoid series. The Makarassou fault-flexure system is interpreted as an extensional faulted monocline that developed in response to differential subsidence and crustal downwarping of the Afar magmatically accreted transitional crust. Large-scale flexuring and associated structures along the eastern flank of the Asal-Manda-Inakir incipient plate boundary are regarded as indicative of a nascent volcanic rifted margin in SE Afar. %G English %2 https://insu.hal.science/insu-00635012/document %2 https://insu.hal.science/insu-00635012/file/TER-2011-0057-1.pdf %L insu-00635012 %U https://insu.hal.science/insu-00635012 %~ SDE %~ INSU %~ UNIV-BREST %~ CNRS %~ GIP-BE %~ LGO %~ CMM %~ GEO-OCEAN