@article{PAR00006878,
  title = {{T}ectonic stresses seaward of an aseismic ridge-{T}rench collision zone. {A} remote sensing approach on the {L}oyalty {I}slands, {SW} {P}acific},
  author = {{B}ogdanov, {I}. and {H}uaman, {D}. and {T}hovert, {J}. {F}. and {G}enthon, {P}ierre and {A}dler, {P}. {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {L}oyalty {I}slands are a series of limestone karstified islands on the {A}ustralian {P}late that are presently approaching the {V}anuatu subduction zone ({SW} {P}acific). {T}hey are deformed due to the combined effects of the bulging of the subducting lithosphere and the beginning collision between the {L}oyalty {R}idge and the {V}anuatu subduction zone. {T}herefore, they constitute a series of markers for early phases of ridge arc collision. {L}ineaments deduced from remote sensing images (aerial photos, {SPOT}3, {SPOT}4 and {ENVISAT} data), termed here as fractures, are analyzed by comparison with planar structures measured during field studies and termed as geological data. {F}racture data indicate a stable main {N}110 direction with a large variance of nearly 15 degrees in rms and two minor directions 45 degrees apart which may constitute shear directions associated to the major one. {A} scale dependent analysis shows that fractures longer than 2000 m are close to the {N}110 direction and that their orientation shifts progressively to reach the {N}125 direction for {L}<400 m. {G}eological data which are generally measured on 1-10 m long structures, reveal a main {N}135 direction in {L}ifou, which may be considered as the continuation of the trend of fracture data for decreasing lengths, and are dispersed in {M}are. {S}ince the shortest scale structures are being subjected to local disturbances, the longest ones are considered as indicative of the present stress state of the {L}oyalty {I}slands. {T}hey are modeled as tension cracks resulting from the elastic bulging of the {A}ustralian lithosphere before its subduction at the {V}anuatu {T}rench and from a single force corresponding to the beginning collision. {I}t is suggested that the stress field deduced from this model may help constraining general models of ridge arc collision and that the {V}anuatu {N}ew {C}aledonia region could be a valuable natural example to calibrate such models.},
  keywords = {{S}ubduction ; {F}racture ; {R}emote sensing ; {A}seismic ridge ; {S}tatistical analysis},
  booktitle = {},
  journal = {{T}ectonophysics},
  volume = {499},
  numero = {1-4},
  pages = {77--91},
  ISSN = {0040-1951},
  year = {2011},
  DOI = {10.1016/j.tecto.2010.12.007},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00006878},
}