@article{fdi:010068176,
  title = {{S}ubduction of seafloor asperities revealed by a detailed stratigraphic analysis of the active margin shelf sediments of {C}entral {E}cuador},
  author = {{P}roust, {J}. {N}. and {M}artillo, {C}. and {M}ichaud, {F}. and {C}ollot, {J}ean-{Y}ves and {D}auteuil, {O}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he uplift of the coastal cordillera of central {E}cuador is a likely consequence of the subduction of the {C}arnegie {R}idge, a 400-km-long and 2-km-high topographic asperity. {T}his study aims at analyzing the impact of the subduction of the {C}arnegie {R}idge on the continental shelf sedimentation during the {Q}uaternary. {W}e interpret high-resolution (50-450 {H}z frequency) multi-channel (72 channels) and single-channel ({S}parker) seismic data, piston cores, sediment profiles (3.5 k{H}z), and high-resolution multibeam bathymetry acquired during the {ATACAMES} cruise with the {RV} {L}'{A}talante in 2012. {I}n the {L}a {P}lata {I}sland-{C}abo {S}an {L}orenzo {P}eninsula region, the results show a full and detailed record of the last ten {Q}uaternary sedimentary sequences deposited in intra-shelf basins, at and-just seaward of the shelf break. {T}hese 100-ka-scale sequences are tied to piston core data, to well-dated {Q}uaternary onshore exposures and to a flight of coastal marine terraces on {C}abo {S}an {L}orenzo {P}eninsula and {L}a {P}lata {I}sland. {T}hese sequences correlate with the global ice volume and deep marine temperature changes (d180) for the last 0.7 {M}a, which points to a strict climatic control on depositional sequence development and preservation. {H}owever, the subsidence of the continental shelf acoustic basement, estimated by the stepwise backstripping of the sedimentary record, exhibits a complex deformation pattern with uplifting and subsiding regions. {D}eep marine seismic data, currently under processing, show evidence for a subducted seamount beneath {L}a {P}lata {I}sland and {GPS} data indicate an importantinterplate coupling in the same area with the potential to generate a {M}w 7-7.5 earthquake. {T}he pattern of the continental shelf deformation is consistent with the shape of this seamount. {W}e tested the hypothesis of a link between the margin deformation and the subduction of the sea mount, by comparing a stepwise subduction of the seamount to the palinspastic restoration of the deformation of the continental shelf for the last 1 {M}a. {T}his comparison shows that the collision probably started c.500 ka ago, together with the syntectonic sedimentation, and drastically slowed down by c.50 ka, with the sealing of most of the deformation on the shelf.},
  keywords = {{A}ctive margin ; {S}eamount subduction ; {Q}uaternary stratigraphy ; {E}cuador ; {C}ontinental shelf ; {EQUATEUR}},
  booktitle = {},
  journal = {{M}arine {G}eology},
  volume = {380},
  numero = {},
  pages = {345--362},
  ISSN = {0025-3227},
  year = {2016},
  DOI = {10.1016/j.margeo.2016.03.014},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068176},
}