Thermo-Poro-Mechanical Properties of Clayey Gouge and Application to Rapid Fault Shearing

Abstract

In this paper, the mechanism of fault pressurization in rapid slip events is analyzed on the basis of a complete characterization of the thermo-poro-mechanical behavior of a clayey gouge extracted at 760m depth in Aigion fault in the active seismic zone of the Gulf of Corinth, Greece. It is shown that the thermally collapsible character of this clayey gouge can be responsible for a dramatic reduction of effective stress and a full fluidization of the material. The thickness of the 'ultra localized' zone of highly strained material is a key parameter that controls the competing phenomena of pore pressure increase leading to fluidization of the fault gouge and temperature increase leading to pore fluid vaporization.

References in corpus (1)

• Thermo-Poro-Mechanical Properties of Clayey Gouge and Application to Rapid Fault Shearing

Cited by in corpus (9)

• Effective stress law for the permeability of a limestone
• Stress dependent thermal pressurization of a fluid-saturated rock
• The effect of undrained heating on a fluid-saturated hardened cement paste
• Thermo-Poro-Mechanical Properties of Clayey Gouge and Application to Rapid Fault Shearing
• On the thermal impact on the excavation damaged zone around deep radioactive waste disposal
• Fluid pressurisation and earthquake propagation in the Hikurangi subduction zone
• Thermo-poro-elastic behaviour of a transversely isotropic shale: Thermal expansion and pressurization
• Temperature induced pore fluid pressurization in geomaterials
• Stress orientation evaluated from strain localisation analysis in Aigion fault