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

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Cited articles

Barnes, P. M. and Nicol, A.: Formation of an active thrust triangle zone associated with structural inversion in a subduction setting, eastern New Zealand, Tectonics, 23, TC1015,, 2004. a
Beaumont, C., Fullsack, P., and Hamilton, J.: Erosional control of active compressional orogens, in: Thrust tectonics, edited by: McClay, K. R., 1–18, Chapman and Hall, New York, Springer, Dordrecht,, 1992. a
Bekins, B., McCaffrey, A. M., and Dreiss, S. J.: Influence of kinetics on the smectite to illite transition in the Barbados accretionary prism, J. Geophys. Res.-Sol. Ea., 99, 18147–18158, 1994. a, b
Bonnet, C., Malavieille, J., and Mosar, J.: Interactions between tectonics, erosion, and sedimentation during the recent evolution of the Alpine orogen: Analogue modeling insights, Tectonics, 26, TC6016,, 2007. a
Borderie, S., Graveleau, F., Witt, C., and Vendeville, B. C.: Impact of an interbedded viscous décollement on the structural and kinematic coupling in fold-and-thrust belts: Insights from analogue modeling, Tectonophysics, 722, 118–137, 2018. a
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.