@article{fdi:010071989,
  title = {{W}hy is there no {C}oastal {C}ordillera at the {A}rica {B}end ({W}estern {C}entral {A}ndes) ?},
  author = {{M}adella, {A}. and {D}elunel, {R}. and {A}udin, {L}aurence and {S}chlunegger, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he architecture of the {W}estern {A}ndes is remarkably constant between southern {P}eru and northern {C}hile. {A}n exception, however, is present near {A}rica at 18 degrees {S}, where the {A}ndes change their strike direction by ca. 50 degrees and the {C}oastal {C}ordillera is absent over an along-strike width of 50km. {A}lthough this feature has been mentioned in several previous studies, no effort has been made yet to describe and explain this peculiar morphology of the {W}estern {C}entral {A}ndean forearc. {H}ere, we propose a large-scale model to explain the {M}yr-long low uplift rate of the {A}rica {B}end concerning seismic coupling and continental wedge-top basin evolution. {N}ew geomorphic and sedimentologic data are integrated with seismicity and structural data from the literature to interpret the post-{O}ligocene pattern of uplift, erosion and sediment transport to the trench. {R}esults show that the {A}rica {B}end has been marked by exceptionally low coastal uplift rates over post-{O}ligocene timescales. {I}n addition, this uplift anomaly at the {A}rica {B}end correlates with relatively high sediment discharge to the corresponding trench segment since late {O}ligocene time. {W}e interpret that before 25{M}a, the forming seaward concavity of the subduction zone induced trench-parallel extension at the curvature apex of the overriding forearc. {T}he subsequent low uplift rate would have then triggered a feedback mechanism, where the interplay between relatively low interplate friction, low coastal uplift and relatively high sediment discharge favoured {M}yr-long relative subsidence at the {A}rica {B}end, in contrast to {M}yr-long uplift of the {C}oastal {C}ordillera north and south of it.},
  keywords = {{PEROU} ; {CHILI}, {ANDES}},
  booktitle = {},
  journal = {{B}asin {R}esearch},
  volume = {30},
  numero = {{S}1},
  pages = {248--268},
  ISSN = {0950-091{X}},
  year = {2018},
  DOI = {10.1111/bre.12218},
  URL = {https://www.documentation.ird.fr/hor/fdi:010071989},
}