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

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

doi:https://doi.org/10.5194/se-12-171-2021

Articles | Volume 12, issue 1

https://doi.org/10.5194/se-12-171-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Thermo-hydro-mechanical–chemical (THMC) processes in natural...

https://doi.org/10.5194/se-12-171-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 12, issue 1

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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Final revised paper (published on 25 Jan 2021)
Supplement to the final revised paper
Preprint (discussion started on 26 Aug 2020)
Supplement to the preprint

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Review of manuscript', Anonymous Referee #1, 02 Sep 2020
- AC1: 'Reply to referee #1's comments', Hanaya Okuda, 03 Nov 2020
RC2: 'Review of Okuda et al. se-2020-144', Anonymous Referee #2, 15 Sep 2020
- AC2: 'Reply to referee #2's comments', Hanaya Okuda, 03 Nov 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Hanaya Okuda on behalf of the Authors (03 Nov 2020) Author's response Manuscript

ED: Referee Nomination & Report Request started (06 Nov 2020) by Jianye Chen

RR by Anonymous Referee #1 (13 Nov 2020)

RR by Anonymous Referee #2 (21 Nov 2020)

ED: Publish subject to technical corrections (26 Nov 2020) by Jianye Chen

ED: Publish subject to minor revisions (review by editor) (26 Nov 2020) by Susanne Buiter (Executive editor)

AR by Hanaya Okuda on behalf of the Authors (30 Nov 2020) Author's response Manuscript

ED: Publish as is (03 Dec 2020) by Jianye Chen

ED: Publish as is (03 Dec 2020) by Susanne Buiter (Executive editor)

AR by Hanaya Okuda on behalf of the Authors (04 Dec 2020)

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.