@article{fdi:010081263,
  title = {{D}eep structure of the {G}renada {B}asin from wide-angle seismic, bathymetric and gravity data},
  author = {{P}adron, {C}. and {K}lingelhoefer, {F}. and {M}arcaillou, {B}. and {L}ebrun, {J}. {F}. and {L}allemand, {S}. and {G}arrocq, {C}. and {L}aigle, {M}. and {R}oest, {W}. {R}. and {B}eslier, {M}. {O}. and {S}chenini, {L}aure and {G}raindorge, {D}. and {G}ay, {A}. and {A}udemard, {F}. and {M}unch, {P}. and {GARANTI} {C}ruise {T}eam},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {G}renada back-arc basin is located between the {A}ves {R}idge, which hosted the remnant {E}arly {P}aleogene "{G}reat {C}aribbean {A}rc," and the {E}ocene to {P}resent {L}esser {A}ntilles {A}rc. {S}everal earlier studies have proposed different modes of back-arc opening for this basin, including {N}-{S} and {E}-{W} directions. {T}he main aim of this study is to constrain the circumstances leading to the opening of the basin. {T}hree combined wide-angle and reflection seismic profiles were acquired in the {G}renada basin. {T}he final velocity models from forward travel time and gravity modeling image variations in thickness and velocity structure of the sedimentary and crustal layers. {T}he sedimentary cover has a variable thickness between 1 km on top of the ridges to similar to 10 km in the basin. {N}orth of {G}uadeloupe {I}sland, the crust is similar to 20 km thick without significant changes between {A}ves {R}idge, the {G}renada basin, and the {E}ocene and present {L}esser {A}ntilles arc. {S}outh of {G}uadeloupe {I}sland the {G}renada basin is underlain by a oceanic crust of mainly magmatic origin over a width of similar to 80 km. {H}ere, the western flank of the {L}esser {A}ntilles {A}rc, the crust is 17.5-km thick. {T}he velocity structure of the {L}esser {A}ntilles {A}rc is typical of volcanic arcs or oceanic plateaus. {W}est of the basin, the crust thickens to 25 km at {A}ves {R}idge in an 80-100 km wide arc-ocean transition zone. {T}he narrowness of this transition zone suggests that opening might have proceeded in a direction oblique to the main convergence. {O}pening probably was accompanied by moderate volcanism. {P}lain {L}anguage {S}ummary {I}n this study, we investigated the formation of the {G}renada {B}asin, located west of the {L}esser {A}ntilles island arc. {T}hese types of basins typically open behind subduction zones, where one tectonic plate is moving underneath another plate. {W}e deployed instruments on the seafloor to record acoustic signals made using pressured air in an array towed behind the ship. {T}his method allowed us to image the sediments and crustal layers along the three profiles of our study. {W}e find that the structure of both the eastern and western margin of the basin are similar in their physical properties, that volcanism was widespread during basin opening, and the southeastern part of the basin is underlain by crust typically found in oceans. {M}ore research is needed to explore the direction of opening and the extent of the oceanic-type crust underneath the modern island arc.},
  keywords = {back-arc basin ; gravity ; {G}renada basin ; wide-angle seismic ; {CARAIBE} ; {CARAIBES} {MER} ; {GRANADA} {BASSIN}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth},
  volume = {126},
  numero = {2},
  pages = {e2020{JB}020472 [26 ]},
  ISSN = {2169-9313},
  year = {2021},
  DOI = {10.1029/2020jb020472},
  URL = {https://www.documentation.ird.fr/hor/fdi:010081263},
}