Production of High‐Sr Andesite and Dacite Magmas by Melting of Subducting Oceanic Lithosphere at Propagating Slab Tears
نویسندگان
چکیده
منابع مشابه
Oceanic slab melting and mantle metasomatism.
Modern plate tectonic brings down oceanic crust along subduction zones where it either dehydrates or melts. Those hydrous fluids or melts migrate into the overlying mantle wedge trigerring its melting which produces arc magmas and thus additional continental crust. Nowadays, melting seems to be restricted to cases of young (< 50 Ma) subducted plates. Slab melts are silicic and strongly sodic (t...
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a School of Earth, Atmosphere and Environment, Monash University, Clayton, 3800 Victoria, Australia b Research Institute of Natural Sciences, Chungnam National University, Daejeon 305-764, South Korea c Minnesota Supercomputing Institute, University of Minnesota, Twin Cities, Minneapolis, MN 55455, USA d Department of Earth Sciences, University of Minnesota, Twin Cities, Minneapolis, MN 55455, ...
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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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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...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2018
ISSN: 2169-9313,2169-9356
DOI: 10.1029/2017jb015066