@article{fdi:010060652,
  title = {{S}tructure of the {L}esser {A}ntilles subduction forearc and backstop from 3{D} seismic refraction tomography},
  author = {{E}vain, {M}. and {G}alve, {A}. and {C}harvis, {P}hilippe and {L}aigle, {M}. and {K}opp, {H}. and {B}ecel, {A}. and {W}einzierl, {W}. and {H}irn, {A}. and {F}lueh, {E}. {R}. and {G}allart, {J}. and {H}ello, {Y}ann and {M}onfret, {T}ony},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n 2007 the {S}ismantilles {II} experiment was conducted to constrain structure and seismicity in the central {L}esser {A}ntilles subduction zone. {T}he seismic refraction data recorded by a network of 27 {OBS}s over an area of 65 km x 95 km provide new insights on the crustal structure of the forearc offshore {M}artinique and {D}ominica islands. {T}he tomographic inversion of first arrival travel times provides a 3{D} {P}-wave velocity model down to 15 km. {B}asement velocity gradients depict that the forearc is made up of two distinct units: {A} high velocity gradient domain named the inner forearc in comparison to a lower velocity gradient domain located further trenchward named the outer forearc. {W}hereas the inner forearc appears as a rigid block uplifted and possibly tilted as a whole to the south, short wavelength deformations of the outer forearc basement are observed, beneath a 3 to 6 km thick sedimentary pile, in relation with the subduction of the {T}iburon {R}idge and associated seafloor reliefs. {N}orth, offshore {D}ominica {I}sland, the outer forearc is 70 km wide. {I}t extends as far as 180 km to the east of the volcanic front where it acts as a backstop on which the accretionary wedge developed. {I}ts width decreases strongly to the south to terminate offshore {M}artinique where the inner forearc acts as the backstop. {T}he inner forearc is likely the extension at depth of the {M}esozoic magmatic crust outcropping to the north in {L}a {D}esirade {I}sland and along the scarp of the {K}arukera {S}pur. {T}he outer forearc could be either the eastern prolongation of the inner forearc, but the crust was thinned and fractured during the past tectonic history of the area or by recent subduction processes, or an oceanic terrane more recently accreted to the island arc.},
  keywords = {{L}esser {A}ntilles subduction zone ; 3{D} seismic refraction tomography ; {F}orearc crustal structure ; {B}ackstop ; {ANTILLES} {FRANCAISES}},
  booktitle = {},
  journal = {{T}ectonophysics},
  volume = {603},
  numero = {},
  pages = {55--67},
  ISSN = {0040-1951},
  year = {2013},
  DOI = {10.1016/j.tecto.2011.09.021},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060652},
}