@article{fdi:010063141,
  title = {{F}ore arc tectonothermal evolution of the {E}l {O}ro metamorphic province ({E}cuador) during the {M}esozoic},
  author = {{R}iel, {N}. and {M}artelat, {J}. {E}. and {G}uillot, {S}. and {J}aillard, {E}tienne and {M}onie, {P}. and {Y}uquilema, {J}. and {D}uclaux, {G}. and {M}ercier, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {E}l {O}ro metamorphic province of {SW} {E}cuador is a composite massif made of juxtaposed terranes of both continental and oceanic affinity that has been located in a fore-arc position since {L}ate {P}aleozoic times. {V}arious geochemical, geochronological, and metamorphic studies have been undertaken on the {E}l {O}ro metamorphic province, providing an understanding of the origin and age of the distinct units. {H}owever, the internal structures and geodynamic evolution of this area remain poorly understood. {O}ur structural analysis and thermal modeling in the {E}l {O}ro metamorphic province show that this fore-arc zone underwent four main geological events. (1) {D}uring {T}riassic times (230-225{M}a), the emplacement of the {P}iedras gabbroic unit at crustal-root level (similar to 9kbar) triggered partial melting of the metasedimentary sequence under an {E}-{W} extensional regime at pressure-temperature conditions ranging from 4.5 to 8.5kbar and from 650 to 900 degrees {C} for the migmatitic unit. (2) {A}t 226{M}a, the tectonic underplating of the {A}renillas-{P}anupali oceanic unit (9kbar and 300 degrees {C}) thermally sealed the fore-arc region. (3) {A}round the {J}urassic-{C}retaceous boundary, the shift from trench-normal to trench-parallel subduction triggered the exhumation and underplating of the high-pressure, oceanic {R}aspas {O}phiolitic {C}omplex (18kbar and 600 degrees {C}) beneath the {E}l {O}ro {G}roup (130-120{M}a). {T}his was followed by the opening of a {NE}-{SW} pull-apart basin, which tilted the massif along an {E}-{W} subhorizontal axis (110{M}a). (4) {I}n {L}ate {C}retaceous times, an {N}-{S} compressional event generated heterogeneous deformation due to the presence of the {C}retaceous {C}elica volcanic arc, which acted as a buttress and predominantly affected the central and eastern part of the massif.},
  keywords = {{E}l {O}ro ; structural study ; fore arc ; {T}riassic times ; {E}cuador ; {S}outh {A}merica ; {EQUATEUR}},
  booktitle = {},
  journal = {{T}ectonics},
  volume = {33},
  numero = {10},
  pages = {1989--2012},
  ISSN = {0278-7407},
  year = {2014},
  DOI = {10.1002/2014tc003618},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063141},
}