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Craig, TJ; Copley, A; Jackson, J (2014)
Publisher: Oxford University Press
Languages: English
Types: Article
Subjects: sub-02

Classified by OpenAIRE into

arxiv: Physics::Geophysics
We use body-waveform modelling to constrain the source parameters of earthquakes occurring globally in oceanic lithosphere beneath the subduction zone outer rise and outer trench slope. These data are then used to map the stress state in the lithosphere of the downgoing plate as it bends into the subduction zone. Our results provide new constraints on the faulting of oceanic lithosphere at the outer rise, which is important for understanding the transmission of plate-driving forces through the subduction system. In all cases, shallow normal-faulting earthquakes are observed at the top of the plate, and are separated in depth from any deeper thrust-faulting earthquakes. No temporal variation associated with large thrust-faulting earthquakes on the subduction interface is seen in the depth extent of each type of faulting at the outer rise. The transition depth from trench-normal extension to compression is found to vary in agreement with models in which deformation is driven by the combination of in-plane stresses and bending stresses, resulting principally from slab pull. Combining the seismologically derived constraints on the thickness of the elastic core of the plate with estimates of the plate curvature, we place upper bounds on the strength of the lithosphere at the outer rise, which is required to be ≲300 MPa for a constant yield stress model, or governed by an effective coefficient of friction of ≲0.3.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Abe, K., 1972. Lithospheric normal faulting beneath the Aleutian Trench, Phys. Earth planet Inter., 5, 190-198.
    • Abercrombie, R.E. & Ekstrom, G., 2001. Earthquake slip on oceanic transform faults, Nature, 410, 74-77.
    • Ammon, C.J., Kanamori, H. & Lay, T., 2008. A great earthquake doublet and seismic stress transfer cycle in the central Kuril islands, Nature, 451, 561-567.
    • Bai, L., Bergman, E.A., Engdahl, E.R. & Kawasaki, I., 2007. The 2004 earthquakes offshore of the Kii peninsula, Japan: hypocentral relocation, source process and tectonic implications, Phys. Earth planet. Inter., 165, 47-55.
    • Boettcher, M.S., Hirth, G. & Evans, B., 2007. Olivine friction at the base of oceanic seismogenic zones, J. geophys. Res., 112, doi:10.1029/ 2006JB004301.
    • Byerlee, J., 1978. Friction of rocks, Pure appl. Geophys., 116, 615-626.
    • Caldwell, J.G., Haxby, W.F., Karig, D.E. & Turcotte, D.L., 1976. On the applicability of a universal elastic trench profile, Earth planet. Sci. Lett., 31, 239-246.
    • Chamot-Rooke, N. & Le Pichon, X., 1989. Zenisu Ridge: mechanical model of formation, Tectonophysics, 160, 175-193.
    • Chapman, C., Yen-Li, C. & Lyness, D., 1988. The WKBJ seismogram algorithm, in Seismological Algorithms: computational Methods and Computer Programs, pp. 47-74, ed. Doornbos, D., Academic Press Limited.
    • Chapple, W.M. & Forsyth, D.W., 1979. Earthquakes and bending of plates and trenches, J. geophys. Res., 84, 6729-6749.
    • Chen, T. & Forsyth, D.W., 1979. A detailed study of two earthquakes seaward of the Tonga Trench: implications for mechanical behaviour of the oceanic lithosphere, J. geophys. Res., 83, 4995-5003.
    • Chinn, D.S. & Isacks, B.L., 1983. Accurate source depths and focal mechanisms of shallow earthquakes in western South America and in the New Hebrides Island Arc, J. geophys. Res., 2, 529-563.
    • Christensen, D.H. & Ruff, L.J., 1983. Outer-rise earthquakes and seismic coupling, Geophys. Res. Lett., 10, 697-700.
    • Christensen, D.H. & Ruff, L.J., 1988. Seismic coupling and outer rise earthquakes, J. geophys. Res., 93, 13 421-13 444.
    • Copley, A., Avouac, J.-P., Hollingsworth, J. & Leprince, S., 2011. The 2001 Mw 7.6 Bhuj earthquake, low fault friction, and the crustal support of plate driving forces in India, J. geophys. Res., 116, doi:10.1029/2010JB008137.
    • Crosby, A.G., McKenzie, D. & Sclater, J.G., 2006. The relationship between depth, age and gravity in the oceans, Geophys. J. Int., 166, 553-573.
    • Todd, E.K. & Lay, T., 2013. The 2011 Northern Kermadec earthquake doublet and subduction zone faulting interactions, J. geophys. Res., 118, 1-13.
    • Turcotte, D. & Schubert, G., 2002. Geodynamics, Cambridge University Press.
    • Valle´e, M., Bouchon, M. & Schwartz, S.Y., 2003. The 13 January 2001 El Salvador earthquake: a multidata analysis, J. geophys. Res., 108, doi:10.1029/2002JB001922.
    • Wang, K., Mulder, T., Rogers, G.C. & Hyndman, R.D., 1995. Case for very low coupling stress on the Cascadia subduction fault, J. geophys. Res., 100, 12 907-12 918.
    • Watts, A.B. & Talwani, M., 1974. Gravity anomalies seaward of deep-sea trenches and their tectonic implications, Geophys. J. R. astr. Soc., 36, 57-90.
    • Webb, T.H. & Anderson, H., 1998. Focal mechanisms of large earthquakes in the North Island of New Zealand: slip partitioning at an oblique active margin, Geophys. J. Int., 134, 40-86.
    • Wessel, P. & Smith, W.H.F., 1998. New, improved version of Generic Mapping Tools released, EOS, Trans. Am. geophys. Un., 79, 579.
    • Wiens, D.A. & Stein, S., 1983. Age dependence of oceanic intraplate seismicity and implications for lithospheric evolution, J. geophys. Res., 88, 6455-6468.
    • Winterbourne, J., Crosby, A. & White, N., 2009. Depth, age and dyamic topography of oceanic lithosphere beneath heavily sedimented Atlantic margins, Earth planet. Sci. Lett., 287, 137-151.
    • Ye, L., Lay, T. & Kanamori, H., 2012. Intraplate and interplate faulting interactions during the August 31, 2012, Philippine Trench earthquake (MW 7.6) sequence, Geophys. Res. Lett., 39, doi:10.1029/2012GL054164.
    • Yue, H. & Lay, T., 2011. Inversion of high-rate (1 sps) GPS data for rupture process of the 11 March 2011 Tohoku earthquake (MW 9.1), Geophys. Res. Lett., 38, doi:10.1029/2011GL048700.
    • Zhang, J. & Lay, T., 1992. The April 5, 1990 Mariana Islands earthquake and subduction zone stresses, Phys. Earth planet. Inter., 72, 99-121.
    • Zwick, P., McCaffrey, R. & Abers, G., 1994. MT5 program, IASPEI Software Library, 4.
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