@article{PAR00008221,
  title = {{T}exturing in {E}arth's inner core due to preferential growth in its equatorial belt},
  author = {{D}eguen, {R}. and {C}ardin, {P}hilippe and {M}erkel, {S}. and {L}ebensohn, {R}. {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e propose an extension of the model by {Y}oshida et al., 1996 where deformation in the inner core is forced by preferential growth in the equatorial belt, by taking into account the presence of a stable compositional stratification. {S}tratification inhibits vertical motion, imposes a flow parallel to isodensity surfaces, and concentrates most deformation in a shallow shear layer of thickness similar to {B}-1/5, where {B} is the dimensionless buoyancy number. {T}he localization of the flow results in large strain rates and enables the development of a strong alignment of iron crystals in the upper inner core. {W}e couple our dynamical model with a numerical model of texture development and compute the time evolution of the lattice preferred orientation of different samples in the inner core. {W}ith sufficient stratification, texturing is significant in the uppermost inner core. {I}n contrast, the deeper inner core is unaffected by any flow and may preserve a fossil texture. {W}e investigate the effect of an initial texture resulting from solidification texturing at the {ICB}. {I}n the present inner core, the deformation rate in the shallow shear layer is large and can significantly alter the solidification texturing, but the solidification texture acquired early in the inner core history can be preserved in the deeper part. {U}sing elastic constants from ab initio calculations, we predict different maps of anisotropy in the modern inner core. {A} model with both solidification texturing and subsequent deformation in a stratified inner core produces a global anisotropy in reasonable agreement with seismological observations.},
  keywords = {{I}nner core ; {A}nisotropy ; {HCP} iron ; {T}exturation ; {C}rystallization},
  booktitle = {},
  journal = {{P}hysics of the {E}arth and {P}lanetary {I}nteriors},
  volume = {188},
  numero = {3-4},
  pages = {173--184},
  ISSN = {0031-9201},
  year = {2011},
  DOI = {10.1016/j.pepi.2011.08.008},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00008221},
}