Articles | Volume 12, issue 1
https://doi.org/10.5194/se-12-171-2021
https://doi.org/10.5194/se-12-171-2021
Research article
 | 
25 Jan 2021
Research article |  | 25 Jan 2021

Effect of normal stress on the frictional behavior of brucite: application to slow earthquakes at the subduction plate interface in the mantle wedge

Hanaya Okuda, Ikuo Katayama, Hiroshi Sakuma, and Kenji Kawai

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Short summary
Serpentinite, generated by the hydration of ultramafic rocks, is thought to be related to slow earthquakes at the subduction plate interface in the mantle wedge. We conducted friction experiments on brucite, one of the components of serpentinite, and found that wet brucite exhibits low and unstable friction under low effective normal stress conditions. This result suggests that wet brucite may be key for slow earthquakes at the subduction plate interface in a hydrated mantle wedge.