@article{fdi:010092191,
  title = {{D}id the evolution from oblique to normal convergence contribute to the {A}ndean building ?},
  author = {{J}aillard, {E}tienne},
  editor = {},
  language = {{ENG}},
  abstract = {{A}lthough submitted to subduction since at least the {T}riassic (approximate to 230 {M}a), the {A}ndean active margin changed in the {L}ate {C}retaceous (approximate to 80 {M}a) from a mainly extension-dominated, marine area to a compressively deformed, mainly emergent zone. {A}t the same time and until the {M}iocene, convergence direction of the {F}arallo<acute accent>n plate evolved step after step from strongly oblique, to almost orthogonal to the {A}ndean margin. {I} propose that these major changes are related to each other. {C}hange in a subduction system from an oblique to a more normal convergence direction geometrically implies a decrease in the distance necessary to acquire the dip of the subduction zone. {T}his triggers an increase in the deformation rate of the subducting slab, and therefore, an increase of its elastic modulus, i.e. an increase of forces resisting bending. {T}his should trigger, either the more rapid bending of the subducting slab, or the contractional deformation and subduction erosion of the upper plate. {B}ecause the oceanic lithosphere is mechanically stronger than the continental lithosphere, the second consequence is more probable, and would cause the flattening of the subduction zone, and therefore, subduction erosion of the upper plate. {S}ubduction erosion would explain the periodic compressional deformation and subsequent subsidence observed in the forearc zones, while flattening of the subducting slab would explain the landward migration and widening of the magmatic arc, observed on the {P}eruvian-{E}cuadorian margin during the {L}ate {C}retaceous-{P}aleogene (approximate to 80, 55-60, approximate to 40 and approximate to 25 {M}a). {F}rom the {N}eogene onwards, the direction of ocean-continent convergence did not change significantly, and contractional deformation may be interpreted as almost continuous.},
  keywords = {{T}ectono-sedimentary evolution ; {S}ubduction direction ; {K}inematic change ; {T}ectonic deformation ; {A}ccretion of oceanic material ; {PEROU} ; {EQUATEUR} ; {ANDES}},
  booktitle = {},
  journal = {{J}ournal of {S}outh {A}merican {E}arth {S}ciences},
  volume = {152},
  numero = {},
  pages = {105312 [14 ]},
  ISSN = {0895-9811},
  year = {2025},
  DOI = {10.1016/j.jsames.2024.105312},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092191},
}