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Stick-slip behavior of a clayey crustal fault

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Title: Stick-slip behavior of a clayey crustal fault
Authors: Kameda, Jun Browse this author
Hamada, Yohei Browse this author
Issue Date: 18-Mar-2022
Publisher: American Physical Society (APS)
Journal Title: Physical Review Research
Volume: 4
Issue: 1
Start Page: 013211
Publisher DOI: 10.1103/PhysRevResearch.4.013211
Abstract: Recent studies have revealed that slip on clay-rich fault planes, which develop in the shallow crust and can cause huge earthquakes, is controlled by their flow properties rather than their frictional properties. Here, we simulate a seismogenic crustal fault and show that such a fault plane may behave as a thixotropic yield stress fluid. We then conduct numerical experiments using a simple spring-slider model that incorporates this thixotropic property, and we successfully reproduce spontaneous stick-slip behaviors that correspond to a variety of seismogenic processes, ranging from regular earthquakes with high slip rates to slow earthquakes with lower slip rates. This finding suggests that the seismic activity on a shallow clay-rich crustal fault may be governed by the time-evolving microstructure of the clay-water system that exists along the fault plane.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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