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The amount of Recycled Crust in Sources of Mantle-Derived Melts

Sobolev, Alexander V; Hofmann, Albrecht W.; Kuzmin, Dmitry V.; Yaxley, Gregory; Arndt, Nicholas T; Chung, Sun-lin; Danyushevsky, Leonid V.; Elliott, Tim; Frey, Frederick A.; Garcia, Michael; Gurenko, Andrey A.; Kamenetsky, Vadim S; Kerr, Andrew C.; Krivolutskaya, Nadezhda A.; Matvienkov, Vladimir V.; Nikogosian, Igor K.; Rocholl, Alexander; Sigurdsson, Ingvar A.; Sushchevskaya, Nadezhda M.; Teklay, Mengist


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...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Science
DOI: 10.1126/science.


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