@article{fdi:010074807,
  title = {{D}evelopment and evolution of the size of polygonal fracture systems during fluid-solid separation in clay-rich deposits},
  author = {{L}opez, {T}. and {A}ntoine, {R}. and {D}arrozes, {J}. and {R}abinowicz, {M}. and {B}aratoux, {D}avid},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n continental and oceanic conditions, clay-rich deposits are characterised by the development of polygonal fracture systems ({PFS}). {PFS} can increase the vertical permeability of clay-rich deposits (mean permeability 10(-16) m(2)) and are pathways for fluids. {O}n continents, the width of {PFS} ranges from centimeters to hundreds of meters, while in oceanic contexts they are up to a few kilometres large. {T}hese structures are linked to water-solid separation during deposition, consolidation and complete fluid squeeze of the clay horizon. {D}uring the last few decades, modeling of melt migration in partially molten plastic rocks led to rigorous quantifications of two-phase flows with a particular emphasis on 2{D} and 3{D} induced flow structures. {T}he numerical modeling shows that the melt migrates on distances at most equal to a few times the compaction length {L} that depends on permeability and viscosity. {C}onsequently, polygonal structures in partially molten plastic rocks result from the melt-rock separation and their sizes are proportional to {L}. {A}pplying these results to fluid-solid separation in clay-rich horizons, we show that (1) centimetric to kilometric {PFS} result from the dramatic increase of {L} during compaction and (2), this process involve agglomerates with 100 m to 1 mm size.},
  keywords = {compaction ; clay deposit ; agglomerates ; polygonal fractures ; desiccation ; cracks},
  booktitle = {},
  journal = {{J}ournal of {E}arth {S}cience},
  volume = {29},
  numero = {6},
  pages = {1319--1334},
  ISSN = {1674-487{X}},
  year = {2018},
  DOI = {10.1007/s12583-017-0814-9},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074807},
}