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      Liquefaction within a bedding fault: Understanding the initiation and movement of the Daguangbao landslide triggered by the 2008 Wenchuan Earthquake (Ms = 8.0)

      , , , , , ,
      Engineering Geology
      Elsevier BV

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          Heat flow and energetics of the San Andreas Fault Zone

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            Heating and weakening of faults during earthquake slip

            James Rice (2006)
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              Friction falls towards zero in quartz rock as slip velocity approaches seismic rates

              An important unsolved problem in earthquake mechanics is to determine the resistance to slip on faults in the Earth's crust during earthquakes. Knowledge of coseismic slip resistance is critical for understanding the magnitude of shear-stress reduction and hence the near-fault acceleration that can occur during earthquakes, which affects the amount of damage that earthquakes are capable of causing. In particular, a long-unresolved problem is the apparently low strength of major faults, which may be caused by low coseismic frictional resistance. The frictional properties of rocks at slip velocities up to 3 mm s(-1) and for slip displacements characteristic of large earthquakes have been recently simulated under laboratory conditions. Here we report data on quartz rocks that indicate an extraordinary progressive decrease in frictional resistance with increasing slip velocity above 1 mm s(-1). This reduction extrapolates to zero friction at seismic slip rates of approximately 1 m s(-1), and appears to be due to the formation of a thin layer of silica gel on the fault surface: it may explain the low strength of major faults during earthquakes.
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                Author and article information

                Journal
                Engineering Geology
                Engineering Geology
                Elsevier BV
                00137952
                December 2021
                December 2021
                : 295
                : 106455
                Article
                10.1016/j.enggeo.2021.106455
                5d7af8e5-969c-4404-837e-af708fa1d53b
                © 2021

                https://www.elsevier.com/tdm/userlicense/1.0/

                http://www.elsevier.com/open-access/userlicense/1.0/

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