Nocquet Jean-Mathieu auteur aut IRD Sue C. auteur aut IRD Walpersdorf A. auteur aut IRD Tran T. auteur aut IRD Lenotre N. auteur aut IRD Vernant P. auteur aut IRD Cushing M. auteur aut IRD Jouanne F. auteur aut IRD Masson F. auteur aut IRD Baize S. auteur aut IRD Chery J. auteur aut IRD van der Beek P. A. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Collisional mountain belts grow as a consequence of continental plate convergence and eventually disappear under the combined effects of gravitational collapse and erosion. Using a decade of GPS data, we show that the western Alps are currently characterized by zero horizontal velocity boundary conditions, offering the opportunity to investigate orogen evolution at the time of cessation of plate convergence. We find no significant horizontal motion within the belt, but GPS and levelling measurements independently show a regional pattern of uplift reaching similar to 2.5 mm/yr in the northwestern Alps. Unless a low viscosity crustal root under the northwestern Alps locally enhances the vertical response to surface unloading, the summed effects of isostatic responses to erosion and glaciation explain at most 60% of the observed uplift rates. Rock-uplift rates corrected from transient glacial isostatic adjustment contributions likely exceed erosion rates in the northwestern Alps. In the absence of active convergence, the observed surface uplift must result from deep-seated processes. specialized FRANCE ALPES 064 066 6 art. 28404 [6 p.] 2016 2045-2322 https://www.documentation.ird.fr/hor/fdi:010067643 10.1038/srep28404 2045-2322 [F B010067643] https://www.documentation.ird.fr/hor/fdi:010067643 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers16-08/010067643.pdf IRD - Base Horizon / Pleins textes 2016-09-05 2017-08-23 fdi:010067643 fre