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      Insight into complex rupturing of the immature bending normal fault in the outer slope of the Japan Trench from aftershocks of the 2005 Sanriku earthquake (Mw= 7.0) located by ocean bottom seismometry : BENDING EARTHQUAKE IN JAPAN TRENCH OUTER RISE

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          Effect of recent revisions to the geomagnetic reversal time scale on estimates of current plate motions

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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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              Seismological evidence for a lithospheric normal faulting — the Sanriku earthquake of 1933

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                Author and article information

                Journal
                Geochemistry, Geophysics, Geosystems
                Geochem. Geophys. Geosyst.
                American Geophysical Union (AGU)
                15252027
                July 2009
                July 2009
                July 30 2009
                : 10
                : 7
                : n/a
                Affiliations
                [1 ]Graduate School of Science; Tohoku University; Sendai; 980-8578; Japan
                [2 ]Japan Agency for Marine-Earth Science and Technology; 3173-25, Showa-cho, Kanazawa-ku,; Yokohama; 236-0001; Japan
                [3 ]Seismological and Volcanological Department; Japan Meteorological Agency; 1-3-4, Otemachi, Chiyoda-ku,; Tokyo; 100-8122; Japan
                [4 ]Technical Department; Sendai District Meteorological Observatory; 1-3-15 Gorin, Miyagino-ku,; Sendai; 983-0842; Japan
                Article
                10.1029/2009GC002415
                8b348633-724a-4309-8d51-d53c0b310aee
                © 2009

                http://doi.wiley.com/10.1002/tdm_license_1.1

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