Articles | Volume 8, issue 4
Solid Earth, 8, 767–788, 2017

Special issue: Analysis of deformation microstructures and mechanisms on...

Solid Earth, 8, 767–788, 2017

Research article 13 Jul 2017

Research article | 13 Jul 2017

Switching deformation mode and mechanisms during subduction of continental crust: a case study from Alpine Corsica

Giancarlo Molli et al.

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Cited articles

Altenberger, U., Prosser, G., Grande, A., Günter, C., and Langone, A.: A seismogenic zone in the deep crust indicated by pseudotachylytes and ultramylonites in granulite-facies ricks of Calabria (Southern Italy), Contrib. Mineral. Petr., 166, 975–994, 2013.
Amitrano, D. and Schmittbuhl, J.: Fracture roughness and gouge distribution of a granite shear band, J. Geophys. Res., 107, 1–16,, 2002.
Andersen, T. B. and Austrheim, H.: Fossil earthquakes recorded by pseudotachylytes in mantle peridotites from the Alpine subduction complex of Corsica, Earth Planet. Sc. Lett., 242, 58–72, 2006.
Andersen, T. B., Austrheim, H., Deseta, N., Silkoset, P., and Ashwal, L. D.: Large subduction earthquakes along the fossil Moho in Alpine Corsica, Geology, 42, 395–398,, 2014.
Angiboust, S., Glodny, J., Oncken, O., and Chopin, C.: In search of transient subduction interfaces in the Dent Blanche–Sesia Tectonic System (W. Alps), Lithos, 205, 298–321, 2014.
Short summary
We present a new case study on the role of brittle precursors in nucleating shear zone. Our studied sample shows a high-pressure, low-temperature (HP/LT) microscale ultramylonite developed by brittle precursors induced during deformation within a host HP/LT granitic mylonite. We infer that the studied structures may be considered as a small-scale example of fault structures related to stick-slip strain accommodation during subduction of continental crust.