@article{fdi:010019275,
  title = {{S}mall-scale crustal variability within an intraplate structure : the {C}rozet {B}ank (southern {I}ndian {O}cean)},
  author = {{R}ecq, {M}. and {G}oslin, {J}. and {C}harvis, {P}hilippe and {O}perto, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {C}rozet {B}ank, the easternmost region of the {C}rozet {P}lateau (austral {I}ndian {O}cean), is capped by two gropus of islands which form the {C}rozet {A}rchipelago ({T}erres {A}ustrales and {A}ntarctiques {F}ran{\c{c}}aises). {A} {N}-{S}-trending 2 km deep basin, the {I}ndivat {B}asin, extends between the two groups of islands and bisects the {C}rozet {B}ank into two separate domains. {T}he interpretation of the {K}e{OBS}8 seismic refraction profile shot during the {K}e{OBS}/{MD}66 cruise ({J}anuary-{F}ebruary 1991) over the eastern {C}rozet {P}lateau was carried out by ray tracing and the computation of synthetic seismograms. {T}his interpretation leads to a rather complex seismic structure and outlines a pronounced eastward crustal thinning from 16.5 to 10 km at the expense of layer 2. {T}he thinning of the crust is abrupt east of the {I}ndivat {B}asin. {U}nlike below the {H}awaiian {I}slands and the {M}arquesas {I}slands, no underplated mantle material underlies the crust of the {C}rozet {B}ank. {M}oreover, this deep seismic sounding has further revealed tha high-velocity outcropping the seabed 30 km east of {I}le aux {C}ochons could be a major structural feature, deeply rooted withn he lower crust. {T}he occurrence of this feature (a submarine volcano ?) is associated with a mantle dyke causing a steep shallowing of the lower crustal interfaces. {G}ravity modelling was performed along line {K}e{OBS}8, with a density structure deduced from the seismic section, to model free-air anomalies derived from altimetry data. {T}his modelling confirms that the {I}ndivat {B}asin, underlined by a gravity low running roughly {N}-{S} between the two groups of islands, is a major structural boundary. {A}s the model generates medium-wavelength anomalies of adequate amplitude, it also confirms that the volcano, located west of the {I}ndivat {B}asin, is a deeply rooted feature. {T}he {C}rozet {B}ank clearly appears as a plume-affected structure, which may have originated from a deep thermal anomaly within the lithsophere... ({D}'apr{\`e}s r{\'e}sum{\'e} d'auteur)},
  keywords = {{CROUTE} {OCEANIQUE} ; {STRUCTURE} ; {POINT} {CHAUD} ; {PROFIL} {SISMIQUE} ; {SISMOGRAMME} ; {BATHYMETRIE} ; {GRAVIMETRIE} ; {MODELISATION} ; {OCEAN} {INDIEN} {ILES} ; {CROZET}},
  booktitle = {},
  journal = {{G}eophysical {J}ournal {I}nternational},
  volume = {134},
  numero = {},
  pages = {145--156},
  ISSN = {0956-540{X}},
  year = {1998},
  DOI = {10.1046/j.1365-246x.1998.00530.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010019275},
}