The effect of high temperature and pressure on rock friction coefficient: a review

Effect of variation of the coefficient of friction on the temperature at the level of the fault lips

“…, and we see that the temperature increases with the evolution of the coefficient of friction. Hu and Sun (2019); Konga et al, (2019); Shelton et al, (1981) came to the same conclusion.…”

“…Their autor's proove that efficiency of thermal pressurization is important to determined the average stress doing work within ruptures at larger amounts of slip than those we have been able to model in this work. Hu and Sun (2019) study the effet of high temperature and pressure on rock friction coefficient. he proove in general that, the value of coefficient of friction increase when the value of temperature increase.…”

Effect of Variation of the Coefficient of Friction on the Temperature at the Level of the Fault Lips

“…It emerged that thermal pressurization was more important in determining the average working stress in failures with larger amounts of slip than those modelled in their work. Hu and Sun [29] studied the effect of high temperature as well as high pressure on the friction coefficient of rock. They thus demonstrated that in general, the value of the frictional coefficient increases when the value of the temperature increases.…”

Influence of Shear Heating and Thermomechanical Coupling on Earthquake Sequences and the Brittle‐Ductile Transition

“…Below the brittle‐ductile transition (BDT), crystal‐plastic creep reduces the flow stress of lithospheric rocks, preventing seismic slip and producing a zone of viscous deformation that forms the ductile root of faults. Temperature also influences the frictional properties of faults, with many experiments providing evidence for a transition from steady‐state velocity‐weakening (VW) to velocity‐strengthening (VS) friction as the temperature is increased, as reviewed by Hu and Sun (2020). Experiments suggest that granite and related crustal rocks undergo this transition at roughly 350°C (e.g., Aharonov & Scholz, 2018, 2019; Blanpied et al., 1991, 1995; Chester, 1995; Dieterich, 1978; Ruina, 1983; Tullis & Weeks, 1986), though other experiments suggest that these rocks can remain VW up to 600°C (Mitchell et al., 2016).…”