@article{fdi:010053707,
  title = {{I}maging the seismic crustal structure of the western {M}exican margin between 19 degrees {N} and 21 degrees {N}},
  author = {{B}artolome, {R}. and {D}anobeitia, {J}. and {M}ichaud, {F}ran{\c{c}}ois and {C}ordoba, {D}. and {D}elgado-{A}rgote, {L}. {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}hree thousand kilometres of multichannel ({MCS}) and wide-angle seismic profiles, gravity and magnetic, multibeam bathymetry and backscatter data were recorded in the offshore area of the west coast of {M}exico and the {G}ulf of {C}alifornia during the spring 1996 ({CORTES} survey). {T}he seismic images obtained off {P}uerto {V}allarta, {M}exico, in the {J}alisco subduction zone extend from the oceanic domain up to the continental shelf, and significantly improve the knowledge of the internal crustal structure of the subduction zone between the {R}ivera and {N}orth {A}merican ({NA}) {P}lates. {A}nalyzing the crustal images, we differentiate: (1) {A}n oceanic domain with an important variation in sediment thickness ranging from 2.5 to 1 km southwards; (2) an accretionary prism comprised of highly deformed sediments, extending for a maximum width of 15 km; (3) a deformed forearc basin domain which is 25 km wide in the northern section, and is not seen towards the south where the continental slope connects directly with the accretionary prism and trench, thus suggesting a different deformational process; and (4) a continental domain consisting of a continental slope and a mid slope terrace, with a bottom simulating reflector ({BSR}) identified in the first second of the {MCS} profiles. {T}he existence of a developed accretionary prism suggests a subduction-accretion type tectonic regime. {D}etailed analysis of the seismic reflection data in the oceanic domain reveals high amplitude reflections at around 6 s [two way travel time (twtt)] that clearly define the subduction plane. {A}t 2 s (twtt) depth we identify a strong reflection which we interpret as the {M}oho discontinuity. {W}e have measured a mean dip angle of 7{A} degrees {A} {A} +/- {A} 1{A} degrees at the subduction zone where the {R}ivera {P}late begins to subduct, with the dip angle gently increasing towards the south. {T}he oceanic crust has a mean crustal thickness of 6.0-6.5 km. {W}e also find evidence indicating that the {R}ivera {P}late possibly subducts at very low angles beneath the {T}res {M}arias {I}slands.},
  keywords = {{R}ivera {P}late ; {M}iddle {A}merica {T}rench ; crustal structure ; seismic ; imaging ; subduction plate ; {BSR}},
  booktitle = {},
  journal = {{P}ure and {A}pplied {G}eophysics},
  volume = {168},
  numero = {8-9},
  pages = {1373--1389},
  ISSN = {0033-4553},
  year = {2011},
  DOI = {10.1007/s00024-010-0206-x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053707},
}