Detail The Amount of Recycled Crust in Sources of Mantle-Derived Melts   Oleh:  Sobolev, Alexander V. ; Hofmann, Albrecht W ; Kuzmin, Dmitry V ; Yaxley, Gregory M. ; Arndt, Nicholas T ; Chung, Sun-Lin ; Danyushevsky, Leonid V ; Elliott, Tim ; Frey, Frederick A ; Garcia, Michael O ; 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. Jenis: Article from Bulletin/Magazine Dalam koleksi: SCIENCE (keterangan: ada di Proquest) vol. 316 no. 5823 (Apr. 2007), page 412. Ketersediaan Perpustakaan FK Nomor Panggil: S01.K.2007.04 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel 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. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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