@article{fdi:010017480,
  title = {{T}he northern {N}ew {H}ebrides back-arc troughs : history and relation with the {N}orth {F}iji basin},
  author = {{C}harvis, {P}hilippe and {P}elletier, {B}ernard},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {N}ew {H}ebrides back arc troughs (southwest {P}acific) are located between the {N}ew {H}ebrides trench arc system and the active {N}orth {F}iji marginal basin. {T}hey are restricted to the southern and northern segments of the arc and were generally related to effects of the {I}ndo {A}ustralian subducting plate (rolling back and/or subduction of the d'{E}ntrecasteaux ridge). {A} detailed bathymetric and magnetic survey over the northern back arc troughs is used to propose a new model for the origin of the {N}ew {H}ebrides back arc troughs. {T}he northern troughs extend over a width of 60 km and are composed of {N} {S} trending grabens and horsts, discontinuous along strike and associated with volcanism. {T}he troughs are disrupted southward at 13° 30'{S}, where the {H}azel {H}olme fracture zone intercepts the {N}ew {H}ebrides island arc. {T}he {E} {W} trending {H}azel {H}olme fracture zone is an extensional feature bisecting the {N}orth {F}iji basin. {I}n its western end, the {H}azel {H}ohne fracture zone is composed of a succession of horsts and grabens striking {N}90 ° {N}100 ° {E}. {G}eometrical and structural relationships between the back arc troughs and the {H}azel {H}olme fracture zone suggest that both these extensional features result from the same process and are closely linked. {T}he northern troughs western end of the {H}azel {H}olme fracture zone region is dominated by {N}130° 135°{E} trending magnetic lineations typical of oceanic crust. {T}hese lineations are oblique to the horsts and grabens systems, and are characteristic of the old {N}orth {F}iji basin oceanic crust. {C}onsequently we conclude that the northern back arc troughs are partly developed on the {N}orth {F}iji basin oceanic basement and that extensional tectonic processes postdate the oldest {N}orth {F}iji basin oceanic crust. {M}orphological and structural evidence suggests that both the back arc troughs and the {H}azel {H}olme fracture zone are recent, still active and result from {NE} {SW} extensional tectonics. {B}ecause other tectonic features throughout the {N}orth {F}iji basin are related to the same stress field, it is inferred that such a {NE} {SW} extension could be a large scale deformation affecting the {N}orth {F}iji basin. {I}t is proposed that the back arc troughs are primarily related to this recent extension within the {N}orth {F}iji basin, but their locations along the arc are also influenced by the subduction of the d'{E}ntrecasteaux ridge which produces, south of 13°30'{S}, nearly {E} {W} trending compression and prevents the formation of troughs. {P}ossibly, these recent extensional tectonic processes result from a major reorganization in the spreading process of the {N}orth {F}iji basin, and could be as young as 0.6-0.7 {M}a.},
  keywords = {{TECTONIQUE} {DE} {PLAQUES} ; {STRUCTURE} ; {BATHYMETRIE} ; {RELIEF} {SOUS} {MARIN} ; {MAGNETISME} ; {ARC} {INSULAIRE} ; {FOSSE} {OCEANIQUE} ; {PACIFIQUE} {TROPICAL} {OUEST} ; {VANUATU} {REGION} ; {FIDJI} {REGION}},
  booktitle = {},
  journal = {{T}ectonophysics},
  volume = {170},
  numero = {},
  pages = {259--277},
  year = {1989},
  DOI = {10.1016/0040-1951(89)90275-8},
  URL = {https://www.documentation.ird.fr/hor/fdi:010017480},
}