The topographic signature of temperature-controlled rheological transitions in an accretionary prism

Pajang, Sepideh; Le Pourhiet, Laetitia; Cubas, Nadaya

doi:https://doi.org/10.5194/se-13-535-2022

Articles | Volume 13, issue 3

https://doi.org/10.5194/se-13-535-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/se-13-535-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 13, issue 3

Research article

|

15 Mar 2022

Research article |

| 15 Mar 2022

The topographic signature of temperature-controlled rheological transitions in an accretionary prism

Sepideh Pajang, Laetitia Le Pourhiet, and Nadaya Cubas

Data sets

pTatin2d (https://bitbucket.org/ptatin/ptatin2d/commits/991118fb4cdae93cf75859a9b1b96ba43e9bc999?at=restart) David Alexander May and Laetitia Le Pourhiet https://doi.org/10.5281/zenodo.4911354

Model code and software

pTatin2d (https://bitbucket.org/ptatin/ptatin2d/commits/991118fb4cdae93cf75859a9b1b96ba43e9bc999?at=restart) David Alexander May and Laetitia Le Pourhiet https://doi.org/10.5281/zenodo.4911354

Video supplement

The topographic signature of temperature controlled rheological transitions in accretionary prism Sepideh Pajang, Laetitia Le Pourhiet, and Nadaya Cubas https://doi.org/10.5281/zenodo.5599365

Short summary

The local topographic slope of an accretionary prism is often used to determine the effective friction on subduction megathrust. We investigate how the brittle–ductile and the smectite–illite transitions affect the topographic slope of an accretionary prism and its internal deformation to provide clues to determine the origin of observed low topographic slopes in subduction zones. We finally discuss their implications in terms of the forearc basin and forearc high genesis and nature.