@article{fdi:010048461,
  title = {{C}ontinental margin deformation along the {A}ndean subduction zone : thermo-mechanical models},
  author = {{G}erbault, {M}uriel and {C}embrano, {J}. and {M}podozis, {C}. and {F}arias, {M}. and {P}ardo, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {C}hilean {A}ndes extend north-{S}outh for about 3000 km over the subducting {N}azca plate, and show evidence of local rheological controls on first-order tectonic features. {H}ere, rheological parameters are tested with numerical models of a subduction driven by slab-pull and upper plate velocities, and which calculate the development of stress and strain over a typical period of 4 {M}yr. {T}he models test the effects of subduction interface strength, arc and fore-arc crust rheology. and arc temperature, on the development of superficial near-surface faulting as well as viscous shear zones in the mantle. {D}eformation geometries are controlled by the intersection of the subduction interface with continental rheological heterogeneities. {U}pper plate shortening and trench advance are both correlated, and favored, to a first-order by upper plate weakness, and to a second-order by interface strength. {I}n cases of a strong interface, a weak fore-arc crust is dragged downward by "tectonic erosion", a scenario for which indications are found along the northern {C}hilean margin. {I}n contrast for a resistant fore-arc, the slab-pull force transmits to the surface and produces topographic subsidence. {T}his process may explain present-day subsidence of the {S}alar de {A}tacama basin and/or the persistence of a {C}entral {D}epression. {S}pecific conditions for northern {C}hile produce a shear zone that propagates from the subduction zone in the mantle, through the {A}ltiplano lower crust into the {S}ub-{A}ndean crust, as proposed by previous studies. {M}odels with a weak interface in turn, allow buoyant subducted material to rise into the continental arc. in case of cessation of the slab-pull, this buoyant material may rise enough to change the stress state in the continental crust, and lead to back-arc opening. {I}n a case of young and hydrated oceanic plate forced by the slab-pull to subduct under a resistant continent, this plate is deviated and indented by the continental mantle, and stretches horizontally at similar to 100 km depth. {T}his situation might explain the flat {W}adati-{B}enioff zone of {C}entral {C}hile.},
  keywords = {{A}ndes subduction ; {T}hermo-mechanical models ; {I}nterface strength ; {T}rench motion ; {F}ore-arc deformation ; {F}lat slab},
  booktitle = {},
  journal = {{P}hysics of the {E}arth and {P}lanetary {I}nteriors},
  volume = {177},
  numero = {3-4},
  pages = {180--205},
  ISSN = {0031-9201},
  year = {2009},
  DOI = {10.1016/j.pepi.2009.09.001},
  URL = {https://www.documentation.ird.fr/hor/fdi:010048461},
}