@article{fdi:010041606,
  title = {{C}ounterclockwise rotation of late {E}ocene-{O}ligocene fore-arc deposits in southern {P}eru and its significance for oroclinal bending in the central {A}ndes},
  author = {{R}operch, {P}ierrick and {S}emp{\'e}r{\'e}, {T}hierry and {M}acedo, {O}. and {A}rriagada, {C}. and {F}ornari, {M}ichel and {T}apia, {C}. and {G}arcia, {M}. and {L}aj, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he results of a paleomagnetic study along the fore arc of southern {P}eru (15-18 degrees {S}) and northern {C}hile (18-19 degrees {S}) are reported from middle to late {M}iocene ignimbrites (7 sites), late {O}ligocene to early {M}iocene ignimbrites (72 sites), {P}aleogene sediments (20 sites), and {M}esozoic and {P}aleocene volcanics and intrusions (31 sites). {C}omparison of locality-mean directions with expected paleomagnetic directions indicates vertical axis rotations ranging from 5.2 +/- 11.3 degrees clockwise to 55.6 +/- 7.0 degrees counterclockwise. {S}patially, the magnitude of counterclockwise rotations increases northward from similar to 0 degrees within the {C}hilean fore arc south of 18 degrees 30'{S} to >45 degrees north of 16 degrees 30'{S}. {I}n southern {P}eru, paleomagnetic rotations recorded in {P}aleogene red beds decrease from late {E}ocene to late {O}ligocene, whereas {M}iocene ignimbrites display no evidence of rotation. {T}hese new results confirm that the rotations recorded in the fore arc of southern {P}eru were acquired at least before similar to 15 {M}a, and probably before 25 {M}a, and thus prior to the late {N}eogene shortening of the sub-{A}ndes. {T}he onset of major {A}ndean shortening in the {E}astern {C}ordillera during the latest {E}ocene-earliest {O}ligocene is interpreted to have triggered the bending of the {P}eruvian fore arc. {T}he region of the {P}eruvian fore arc with the largest rotations appears to be the fore-arc counterpart of the {A}bancay deflection, a remarkable {NE}-{SW} offset in the axis of the {E}astern {C}ordillera induced by a major regional preorogenic structure. {W}e underline that the {A}bancay deflection should be seen as the northwestern boundary, and therefore as a key element, of the {B}olivian {O}rocline.},
  keywords = {},
  booktitle = {},
  journal = {{T}ectonics},
  volume = {25},
  numero = {3},
  pages = {art. no. {TC}3010 {NIL}_45--{NIL}_73},
  ISSN = {0278-7407},
  year = {2006},
  DOI = {10.1029/2005{TC}001882},
  URL = {https://www.documentation.ird.fr/hor/fdi:010041606},
}