Slab pull and the seismotectonics of subducting lithosphere
نویسندگان
چکیده
منابع مشابه
Tensor-guided fitting of subducting slab depths
Earthquakes and active-source seismic surveys provide estimates of depths of subducting slabs, but only at scattered locations. Constructing a useful 3D model of slab geometry involves fitting the depth estimates with a uniformly sampled function of space. The method used to fit the data should account for the curvature of the earth’s surface as well as data uncertainties. In addition to estima...
متن کاملTensor-guided interpolation of subducting slab depths
Earthquakes and seismic surveys provide estimates of depths of subducting slabs, but only at scattered locations. To construct a useful three dimensional model of slab geometry we must interpolate slab depths at uniformly sampled locations on the earth’s surface, and the interpolation method should account for the curvature of that surface. In addition to estimates of depths from earthquake loc...
متن کاملModeling lower mantle anisotropy development in a subducting slab
A model is presented that simulates anisotropy development in a subducting slab from the upper–lower mantle boundary (661 km) to the core–mantle boundary (2891 km). Two phases are considered: orthorhombic MgSiO3-perovskite and cubic magnesiowuestite (Mg,Fe)O. Single crystal elastic properties at mantle conditions are obtained from existing density functional theory calculations and quasiharmoni...
متن کاملSlab pull, slab weakening, and their relation to deep intra-slab seismicity
[1] Subduction zone seismicity is highly variable. Great earthquakes occur at few subduction zones around the world, with significant variation in size and frequency of deep events. Interactions between overriding and subducting plates and slab pull strength for individual plates provide a framework for understanding these variations. Previous work suggests an inverse correlation between great ...
متن کاملDehydration of subducting slow-spread oceanic lithosphere in the Lesser Antilles
Subducting slabs carry water into the mantle and are a major gateway in the global geochemical water cycle. Fluid transport and release can be constrained with seismological data. Here we use joint active-source/local-earthquake seismic tomography to derive unprecedented constraints on multi-stage fluid release from subducting slow-spread oceanic lithosphere. We image the low P-wave velocity cr...
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ژورنال
عنوان ژورنال: Reviews of Geophysics
سال: 1987
ISSN: 8755-1209
DOI: 10.1029/rg025i001p00055