@article{PAR00013847, title = {{S}ynconvergence flow inside and at the margin of orogenic plateaus : lithospheric-scale experimental approach}, author = {{B}ajolet, {F}. and {C}hardon, {D}ominique and {M}artinod, {J}. and {G}apais, {D}. and {K}ermarrec, {J}. {J}.}, editor = {}, language = {{ENG}}, abstract = {{T}his study investigates three-dimensional flow modes of orogenic plateaus by means of physical modeling. {E}xperiments consist of shortening two contiguous lithospheres of contrasting strength, one being a weak plateau-type lithosphere and the other a strong craton-type lithosphere. {T}he lateral boundaries are either totally confined or allow escape toward a lateral foreland on one side. {T}wo synconvergence flow regimes are distinguished, which are governed by the balance between the gravity potential and the strength of the plateau crust and the resistance of its lateral foreland. {T}he first regime implies transversal (orogen-normal) injection of plateau lower crust into the collision zone as a result of confinement of the plateau by an increasingly stiffer lateral boundary. {A}s a precursor mechanism to channel flow, transversal injection responds to downward thickening of the plateau crust that is forcedly extruded into the orogenic wedge. {T}he second regime is that of collapse-driven lateral escape of the plateau. {T}his regime is established after a threshold is attained in the interplate coupling in the collision zone, which allows the gravity potential of the plateau to overcome the resistance of its lateral boundary. {U}nder the collapse-driven escape regime (orogen parallel), such as that governing {T}ibet during the last 13{M}a, most of the convergence in the plateau and the top and rear of the collisional wedge is transformed into lateral flow and extension.}, keywords = {crustal flow ; analog modeling ; lateral escape ; extrusion tectonics ; orogenic plateau ; hot orogen}, booktitle = {}, journal = {{J}ournal of {G}eophysical {R}esearch. {S}olid {E}arth}, volume = {120}, numero = {9}, pages = {6634--6657}, ISSN = {2169-9313}, year = {2015}, DOI = {10.1002/2015jb012110}, URL = {https://www.documentation.ird.fr/hor/{PAR}00013847}, }