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The Amount of Recycled Crust in Sources of Mantle-Derived Melts
Alexander V. Sobolev,1,2*Albrecht W. Hofmann,1Dmitry V. Kuzmin,1,3Gregory M. Yaxley,4Nicholas T. Arndt,5Sun-Lin Chung,6Leonid V. Danyushevsky,7Tim Elliott,8Frederick A. Frey,9Michael O. Garcia,10Andrey A. Gurenko,1Vadim S. Kamenetsky,7Andrew C. Kerr,11Nadezhda A. Krivolutskaya,2Vladimir V. Matvienkov,12Igor K. Nikogosian,13,14Alexander Rocholl,15Ingvar A. Sigurdsson,16Nadezhda M. Sushchevskaya,2Mengist Teklay17
Plate tectonic processes introduce basaltic crust (as eclogite)into the peridotitic mantle. The proportions of these two sourcesin mantle melts are poorly understood. Silica-rich melts formedfrom eclogite react with peridotite, converting it to olivine-freepyroxenite. Partial melts of this hybrid pyroxenite are higherin nickel and silicon but poorer in manganese, calcium, andmagnesium than melts of peridotite. Olivine phenocrysts' compositionsrecord these differences and were used to quantify the contributionsof pyroxenite-derived melts in mid-ocean ridge basalts (10 to30%), ocean island and continental basalts (many >60%), andkomatiites (20 to 30%). These results imply involvement of 2to 20% (up to 28%) of recycled crust in mantle melting.
1 Max Planck Institute (MPI) for Chemistry, Post Office Box 3060, 55020 Mainz, Germany. 2 Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Kosygin Street 19, 119991 Moscow, Russia. 3 Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Koptuyga prospekt 3, 630090 Novosibirsk, Russia. 4 Research School of Earth Sciences, Australian National University, Canberra, ACT 0200 Australia. 5 Laboratoire de Géodynamique des Chaînes Alpines, Université de Grenoble, 38401 Grenoble cedex, France. 6 Department of Geosciences, National Taiwan University, Post Office Box 13-318, Taipei 106, Taiwan. 7 Australian Research Council, Centre of Excellence in Ore Deposits and School of Earth Sciences, University of Tasmania, Private Bag 79, Hobart, Tasmania, 7001, Australia. 8 Department of Earth Sciences, Queen's Road, Wills Memorial Building, University of Bristol, Bristol BS8 1RJ, UK. 9 Department of Earth, Atmospheric, and Planetary Science, Massachusetts Institute of Technology (MIT), 77 Massachusetts Avenue, Cambridge, MA 02139, USA. 10 Department of Geology and Geophysics, University of Hawaii, 1680 East-West Road, Honolulu, HI 96822, USA. 11 School of Earth, Ocean and Planetary Sciences, Cardiff University, Main Building, Park Place, Cardiff CF10 3YE, UK. 12 P. P. Shirshov Institute of Oceanology of Russian Academy of Sciences, Nakhimovsky prospekt 36, 117997 Moscow, Russia. 13 Department of Petrology, Faculty of Geosciences Utrecht University, Budapestlaan 4, Utrecht, Netherlands. 14 Department of Petrology, Faculty of Earth and Life Sciences, Vrije Universiteit, De Boelelaan 1085, 1081 HV Amsterdam, Netherlands. 15 Department of Earth and Environmental Sciences, University Munich, 80333 Munich, Germany. 16 South Iceland Nature Centre, Strandvegur 50, Vestmannaeyjar, IS 900, Iceland. 17 Department of Earth Science, University of Asmara, Asmara, Eritrea.
* To whom correspondence should be addressed. E-mail: sobolev{at}geokhi.ru
Olivine inclusions in Siberian diamonds: high-precision approach to minor elements.
N. V. Sobolev, A. M. Logvinova, D. A. Zedgenizov, N. P. Pokhilenko, D. V. Kuzmin, and A. V. Sobolev (2008)
European Journal of Mineralogy
20, 305-315
|Abstract »|Full Text »|PDF »
Ultra-refractory Domains in the Oceanic Mantle Lithosphere Sampled as Mantle Xenoliths at Ocean Islands.
N. S. C. Simon, E.-R. Neumann, C. Bonadiman, M. Coltorti, G. Delpech, M. Gregoire, and E. Widom (2008)
J. Petrology
49, 1223-1251
|Abstract »|Full Text »|PDF »
Metasomatized Lithosphere and the Origin of Alkaline Lavas.
Olivine in the Udachnaya-East Kimberlite (Yakutia, Russia): Types, Compositions and Origins.
V. S. Kamenetsky, M. B. Kamenetsky, A. V. Sobolev, A. V. Golovin, S. Demouchy, K. Faure, V. V. Sharygin, and D. V. Kuzmin (2008)
J. Petrology
49, 823-839
|Abstract »|Full Text »|PDF »
Phase Relations and Melting of Anhydrous K-bearing Eclogite from 1200 to 1600{degrees}C and 3 to 5 GPa.
C. Spandler, G. Yaxley, D. H. Green, and A. Rosenthal (2008)
J. Petrology
49, 771-795
|Abstract »|Full Text »|PDF »
Enriched Pt-Re-Os Isotope Systematics in Plume Lavas Explained by Metasomatic Sulfides.
A. Luguet, D. Graham Pearson, G. M. Nowell, S. T. Dreher, J. A. Coggon, Z. V. Spetsius, and S. W. Parman (2008)
Science
319, 453-456
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Uniform processes of melt differentiation in the central Izu Bonin volcanic arc (NW Pacific).
S. M. Straub (2008)
Geological Society, London, Special Publications
304, 261-283
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The Kalahari Epeirogeny and climate change: differentiating cause and effect from core to space.
