This session merges “Deformation processes: microstructures, textures, rheology and fluid migration” and “Localization of deformation in the Lithosphere”.

Deformation in the lithosphere is strongly localized from the grain scale to the plate scale. We propose a multidisciplinary session that encourages all aspects of research on multi-scale deformation. The session will discuss:
1) The processes and parameters that control localization on given length and time scales;
2) The interaction between scale-specific processes;
3) New questions regarding the measurement (by conventional and new techniques) and interpretation (applying previous and new theories) of microstructures and textures to identify deformation processes, mechanisms and rheology;
4) New findings related to porosity, permeability and fluid migration in ductile shear zones as well as associated variations in flow properties with time.