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Pervasive pressure‐solution transfer: A poro‐visco‐plastic model
Author(s) -
Revil A.
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1998gl900268
Subject(s) - rheology , materials science , thermodynamics , viscoelasticity , thermal diffusivity , quartz , newtonian fluid , phase (matter) , mechanics , composite material , chemistry , physics , organic chemistry
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.