The Amount of Recycled Crust in Sources of Mantle-Derived Melts
By A. Sobolev, A. Hofmann, D. Kuzmin, G. Yaxley, N. Arndt, Sun‐Lin Chung, L. Danyushevsky, T. Elliott, F. Frey, Michael O. Garcia and 10 more. Science, 2007
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Plate tectonic processes introduce basaltic crust (as eclogite) into the peridotitic mantle. The proportions of these two sources in mantle melts are poorly understood. Silica-rich melts formed from eclogite react with peridotite, converting it to olivine-free pyroxenite. Partial melts of this hybrid pyroxenite are higher in nickel and silicon but poorer in manganese, calcium, and magnesium than melts of peridotite. Olivine phenocrysts' compositions record these differences and were used to quantify the contributions of pyroxenite-derived melts in mid-ocean ridge basalts (10 to 30%), ocean island and continental basalts (many >60%), and komatiites (20 to 30%). These results imply involvement of 2 to 20% (up to 28%) of recycled crust in mantle melting.
Subfields: Molecular Biology, Plant Science
View Paper: https://www.semanticscholar.org/paper/0f576c911c1edcc085c3fd04a18b22bf14b6dba9
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Citations in the corpus
- Geophysics of Chemical Heterogeneity in the Mantle (2012, background): “Ocean island and mid-ocean ridge basalts are too enriched in various trace and minor elements to have been formed by partial melting of a homogeneous fertile peridotite (Dasgupta et al. 2010, Hirschmann & Stolper 1996, Prytulak & Elliott 2007, Sobolev et al. 2007).”
- Thermal history of the Earth and its petrological expression (2010, background): “Wework with komatiites from the Alexo and Pyke Hill areas of the Abitibi greenstone belt (Arndt, 1986; Lahaye and Arndt, 1996; Puchtel et al., 2004; Fan and Kerrich, 1997; Sproule et al., 2002; Shore, 1996; Sobolev et al., 2007), and the Belingwe greenstone belt (Bickle et al., 1993; Puchtel et al.,”
- Fate of Pyroxenite-derived Melts in the Peridotitic Mantle: Thermodynamic and Experimental Constraints (2012, background): “…please e-mail: journals.permissions@ oup.com Downloaded from https://academic.oup.com/petrology/article-abstract/53/3/451/1609331 by guest on 29 July 2018 role in controlling the chemical variability of mantlederived melts (Sleep, 1984; Alle' gre & Turcotte, 1986; Sobolev et al., 2007).”