@article{fdi:010073999,
  title = {{T}racking subducted ridges through intermediate-depth seismicity in the {V}anuatu subduction zone},
  author = {{B}aillard, {C}. and {C}rawford, {W}. {C}. and {B}allu, {V}. and {P}elletier, {B}ernard and {G}araebiti, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he distribution of intermediate-depth seismicity beneath the {V}anuatu archipelago ({S}outh {P}acific {O}cean) includes several seismic clusters/alignments and gaps, including a remarkable 200 x 150 km gap beneath central {V}anuatu. {W}e show that a zone of enhanced seismicity beneath this gap corresponds to the most likely trace of the subducted {D}'{E}ntrecasteaux {R}idge ({DER}), and that another region of aligned seismicity to the south may correspond to another significant, now-disappeared ridge. {W}e suggest that regions of aligned intermediate-depth seismicity beneath {V}anuatu are traces of subducted oceanic features on the down-going plate, probably caused by enhanced hydration beneath them prior to subduction. {T}he seismic gap above the {DER} trace, previously interpreted as a tear in the slab, may instead be a region of reduced hydration due to thick/unfractured input crust, low bending of this crust before subduction, and/or greater slab residence time at shallower subducted depths, the latter two being directly related to {DER} collision. {W}e propose that an uneven distribution of intermediate-depth seismicity at subduction zones may provide a window to the history and effects of subducted oceanic features.},
  keywords = {{VANUATU} ; {PACIFIQUE} {SUD}},
  booktitle = {},
  journal = {{G}eology},
  volume = {46},
  numero = {9},
  pages = {767--770},
  ISSN = {0091-7613},
  year = {2018},
  DOI = {10.1130/g45010.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073999},
}