Borderie S. auteur aut IRD Vendeville B. C. auteur aut IRD Graveleau F. auteur aut IRD Witt C. auteur aut IRD Dubois P. auteur aut IRD Baby Patrice auteur aut IRD Calderon Y. auteur aut IRD text journalArticle eng text/pdf born digital access The Huallaga Basin is a deformed foreland basin located in North Peru. The basin comprises several syntectonic depocenters. The most significant is the Biabo Syncline located at the back of the Chazuta Thrust, a long, flat-floored thrust detaching on an evaporitic decollement, which has accommodated more than 40 km of horizontal displacement. The hangingwall of the Chazuta Thrust has remained remarkably intact with little or no internal deformation and has incorporated a large volume of evaporites at its base. In order to unravel the formation and evolution of this thrust, we conducted a series of physical experiments that tested the role of various parameters. The goal is to investigate a system in which most of the deformation is accommodated in the frontal part of the chain (Chazuta Thrust), whereas deformation of the thrust sheet itself remains minor. Results from our experimental investigations suggest that the three key parameters that have allowed for such a long-lived, large-slip frontal thrust to operate are (1) the wedge-shaped syn-kinematic sedimentation, (2) the presence of the Biabo Syncline, which acted as a bulldozer pushing the evaporites forward, forcing their distal inflation and (3) the erosion at the front that favored farther advance of the frontal thrust, dragging passively large volumes of evaporites along with it. specialized Huallaga Basin Chazuta thrust Evaporitic decollement Analogue modeling Strain localization Surface processes PEROU HUALLAGA BASSIN 064 066 020 123 1-17 2019 0191-8141 https://www.documentation.ird.fr/hor/fdi:010075670 10.1016/j.jsg.2019.03.002 0191-8141 [F B010075670] https://www.documentation.ird.fr/hor/fdi:010075670 https://www.documentation.ird.fr/intranet/publi/2019/05/010075670.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2019-06-04 2025-02-24 fdi:010075670 fre