Pervasive pressure-solution transfer: a poro-visco-plastic model

Details Pervasive pressure-solution transfer: a poro-visco-plastic model Pervasive pressure-solution transfer: a poro-visco-plastic model

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..255r&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 2, p. 255-258

Physics

23

Mineral Physics: Creep And Deformation, Mineral Physics: Elasticity And Anelasticity, Mineral Physics: Surfaces And Interfaces, Physical Properties Of Rocks: Permeability And Porosity

Scientific paper

Stressed quartz sand saturated by water can deform by matter transport through the water phase (pressure solution). This process is modeled by a poro-visco-plastic (Voigt-type) rheology. A characteristic time constant characterizes the transition between Newtonian viscous densification and poro-plastic deformations. For short-time scales, the viscous densification is either controlled by interface kinetic or by the diffusivity of the solute Si(OH)4 at the grain contacts. For long-time scales, the poro-plastic rheology corresponds to a thermodynamic equilibrium at the grain contacts.

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