%0 Journal Article %T North Aegean core complexes, the gravity spreading of a thrust wedge %+ Géosciences Rennes (GR) %+ Physics of Geological Processes [Oslo] (PGP) %A Kydonakis, Konstantinos %A Brun, Jean-Pierre %A Sokoutis, Dimitrios %< avec comité de lecture %Z PL03435 %@ 0148-0227 %J Journal of Geophysical Research %I American Geophysical Union %V 120 %N 1 %P 595-616 %8 2015 %D 2015 %R 10.1002/2014JB011601 %Z Sciences of the Universe [physics]/Earth SciencesJournal articles %X The North Aegean core complexes developed in middle Eocene soon after the end of continentalblock convergence and piling up of the Hellenic Thrust Wedge. They formed during back-arc extension, drivenby the Hellenic slab rollback, at the back of the thrust wedge. A series of scaled laboratory experiments wasperformed to test whether the gravity spreading of a thrust wedge is a suitable process for the development ofthe North Aegean core complexes during back-arc extension. Wedge-shaped sand-siliconmodels with variableboundary displacement velocities and different geometries of the upper sand layer were used to study theeffects of variations in wedge rheology on the pattern of extension. The models exemplify that extension, eitherdistributed (wide rift mode) or localized (core complex mode), is always located at the wedge rear. Corecomplex development was favored in models with thicker brittle layer (higher frictional strength) and lowstretching rate (lower ductile strength). Both core complex location at the wedge rear and detachment locationand dip are interdependent and intrinsically related to the initial wedge shape of the extending system. Theexperimental model displays striking similarities with the extensional pattern of the North Aegean in terms of(i) location, size, and shape of core complexes as well as their sequence of development and (ii) detachmentlocation and dip. We conclude that it is the initial wedge geometry of the system and the weak nature of thecrust at the onset of extension that controlled the extensional pattern of the North Aegean domain. %G English %2 https://insu.hal.science/insu-01117882/document %2 https://insu.hal.science/insu-01117882/file/Kydonakis-JGR-2015.pdf %L insu-01117882 %U https://insu.hal.science/insu-01117882 %~ INSU %~ UNIV-RENNES1 %~ UR2-HB %~ CNRS %~ GR %~ OSUR %~ UR1-HAL %~ UR1-SDLM %~ UR1-SDLMJONCH %~ GR-3T %~ UNIV-RENNES2 %~ TEST-UNIV-RENNES %~ TEST-UR-CSS %~ UNIV-RENNES %~ INRAE %~ UR1-ENV