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Locking of the Chile subduction zone controlled by fluid pressure before the 2010 earthquake

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      Poisson's ratio and crustal seismology

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        Bending-related faulting and mantle serpentinization at the Middle America trench.

        The dehydration of subducting oceanic crust and upper mantle has been inferred both to promote the partial melting leading to arc magmatism and to induce intraslab intermediate-depth earthquakes, at depths of 50-300 km. Yet there is still no consensus about how slab hydration occurs or where and how much chemically bound water is stored within the crust and mantle of the incoming plate. Here we document that bending-related faulting of the incoming plate at the Middle America trench creates a pervasive tectonic fabric that cuts across the crust, penetrating deep into the mantle. Faulting is active across the entire ocean trench slope, promoting hydration of the cold crust and upper mantle surrounding these deep active faults. The along-strike length and depth of penetration of these faults are also similar to the dimensions of the rupture area of intermediate-depth earthquakes.
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          The updip and downdip limits to great subduction earthquakes: Thermal and structural models of Cascadia, south Alaska, SW Japan, and Chile

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            Author and article information

            Journal
            Nature Geoscience
            Nature Geosci
            Springer Nature
            1752-0894
            1752-0908
            March 23 2014
            March 23 2014
            : 7
            : 4
            : 292-296
            10.1038/ngeo2102
            © 2014
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