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The amount of recycled crust in sources of mantle-derived melts

Citation

Sobolev, AV and Hofmann, AW and Kuzmin, DV and Yaxley, GM and Arndt, NT and Chung, SL and Danyushevsky, LV and Elliot, T and Frey, FA and Garcia, MO and Gurenko, AA and Kamenetsky, VS and Kerr, AC and Krivolutskaya, NA and Matvienkov, VV and Nikogosian, IK and Rocholl, A and Sigurdsson, IA and Sushchevskaya, NM and Teklay, M, The amount of recycled crust in sources of mantle-derived melts, Science, 316, (5823) pp. 412-417. ISSN 0036-8075 (2007) [Refereed Article]

DOI: doi:10.1126/science.1138113

Abstract

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.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and Metamorphic Petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
UTAS Author:Danyushevsky, LV (Professor Leonid Danyushevsky)
UTAS Author:Kamenetsky, VS (Professor Vadim Kamenetsky)
ID Code:51629
Year Published:2007
Web of Science® Times Cited:766
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2007-08-01
Last Modified:2011-11-28
Downloads:0

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