FN Archimer Export Format PT J TI The Esmeraldas Canyon: a helpful marker of the Pliocene‐Pleistocene tectonic deformation of the north Ecuador southwest Colombia convergent margin BT AF Collot, Jean-Yves Ratzov, Gueorgui Silva, P. Proust, J.‐N. Migeon, Sebastien Hernandez, M.‐J. Michaud, F. Pazmino, A. Barba Castillo, D. Alvarado, A. Khumara, S. AS 1:1;2:9;3:2;4:1,3;5:4,9;6:4,5,9;7:4,9;8:6;9:7;10:2;11:1,8; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:; C1 Université Côte d'Azur, IRD, CNRS, Observatoire de la Côte d'Azur Valbonne, France Instituto GeofísicoEscuela Politécnica Nacional Quito ,Ecuador Université de Rennes, CNRS, UMR6118, Geosciences Rennes, France Sorbonne Université, France Departamento de GeologíaEscuela Politécnica Nacional Quito, Ecuador Instituto Oceanográfico de la Armada del Ecuador Guayaquil, Ecuador Petroamazonas EP Quito ,Ecuador Escuela de GeologíaUniversidad Industrial de Santander Bucaramanga ,Colombia C2 IRD, FRANCE IGEPN, ECUADOR UNIV RENNES, FRANCE UNIV PARIS 06, FRANCE ECOLE POLYTECH QUITO, ECUADOR INOCAR, ECUADOR PETROAMAZONAS, ECUADOR UNIV INDUST SANTANDER, COLOMBIA UNIV NICE, FRANCE IF 3.543 TC 13 UR https://archimer.ifremer.fr/doc/00509/62060/66236.pdf LA English DT Article CR AMADEUS ATACAMES-EQUA ESMERALDAS BO L'Atalante DE ;convergent margin tectonics;submarine canyon;fore-arc basin;natural hazards;paleoseismology AB Deciphering the migration pattern of the Esmeraldas submarine Canyon (EC) and its history of cut‐and‐fill allows constraining the Pliocene‐Pleistocene tectonic evolution of the Ecuador‐Colombia convergent margin. Swath bathymetry, multichannel seismic reflection and chronological data show that the EC is a 143‐km–long, shelf‐incising, river‐connected canyon that started incising slope apron deposits in the Manglares fore‐arc basin ~ 5.3 Ma ago. The EC inception appears contemporaneous with the subduction of the Carnegie Ridge that is believed to have initiated 5‐6 Myr ago and is considered an indirect cause of the EC formation. During its two‐stage left‐lateral migration, the EC upper‐half scoured deep incisions providing evidences for uplift episodes in the Manglares basin that are correlated with mid‐Pliocene and Pleistocene regional tectonic events. Glacio‐eustatic variations contributed significantly to shape the EC and its upslope tributaries by increasing the rate of canyon incision during rapid sea level falls. Faults, folds and diapirs have structurally controlled the location of the EC and of its tributary canyons, including the Ancon Canyon, which served as the main spillway of the Manglares basin prior to be cut from its source ~170 kyr ago by the growth of a fault‐related anticline. The margin wedge that hosts the EC is highly unstable as it is cut by active faults and shaken by large subduction earthquakes. Several mass transport deposits have dammed the EC, one of them between >~65 and ~37 kyr causing an impoverishment of detrital material in the trench sedimentation and a possible interruption of the paleoseismological record. PY 2019 PD AUG SO Tectonics SN 0278-7407 PU American Geophysical Union (AGU) VL 38 IS 8 UT 000497850300026 BP 3140 EP 3166 DI 10.1029/2019TC005501 ID 62060 ER EF