AustralieFrV1, Main, Exploration, bibRecord, 009309

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

Identifieur interne : 009309 ( Main/Exploration ); précédent : 009308; suivant : 009310

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

Auteurs : Alexander V. Sobolev [Allemagne, Russie] ; Albrecht W. Hofmann [Allemagne] ; Dmitry V. Kuzmin [Allemagne, Russie] ; Gregory M. Yaxley [Australie] ; Nicholas T. Arndt [France] ; Sun-Lin Chung [Taïwan] ; Leonid V. Danyushevsky [Australie] ; Tim Elliott [Royaume-Uni] ; Frederick A. Frey [États-Unis] ; Michael O. Garcia [États-Unis] ; Andrey A. Gurenko [Allemagne] ; Vadim S. Kamenetsky [Australie] ; Andrew C. Kerr [Royaume-Uni] ; Nadezhda A. Krivolutskaya [Russie] ; Vladimir V. Matvienkov [Russie] ; Igor K. Nikogosian [Pays-Bas] ; Alexander Rocholl [Allemagne] ; Ingvar A. Sigurdsson [Islande] ; Nadezhda M. Sushchevskaya [Russie] ; Mengist Teklay [Érythrée]

Source :

Science : (Washington, D.C.) [ 0036-8075 ] ; 2007.

RBID : Pascal:07-0241048

Descripteurs français

Pascal (Inist)
- Recyclage, Croûte océanique, Manteau, Tectonique plaque, Eclogite, Basalte, Zone subduction, Péridotite, Pyroxénite, Fusion partielle, Composition chimique, MORB, OIB, Basalte plateau, Komatiite, Forsterite, Hétérogénéité.

English descriptors

KwdEn :
- Mid Ocean Ridge Basalt, basalts, chemical composition, eclogite, flood basalts, forsterite, heterogeneity, komatiite, mantle, ocean-island basalts, oceanic crust, partial melting, peridotites, plate tectonics, pyroxenite, recycling, subduction zones.

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 olívine-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.

Affiliations:

Links toward previous steps (curation, corpus...)

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Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">The amount of recycled crust in sources of mantle-derived melts</title>
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<author><name sortKey="Gurenko, Andrey A" sort="Gurenko, Andrey A" uniqKey="Gurenko A" first="Andrey A." last="Gurenko">Andrey A. Gurenko</name>
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<affiliation wicri:level="1"><inist:fA14 i1="14"><s1>Department of Petrology, Faculty of Earth and Life Sciences, Vrije Universiteit, De Boelelaan 1085</s1>
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<author><name sortKey="Teklay, Mengist" sort="Teklay, Mengist" uniqKey="Teklay M" first="Mengist" last="Teklay">Mengist Teklay</name>
<affiliation wicri:level="1"><inist:fA14 i1="17"><s1>Department of Earth Sdence, University of Asmara</s1>
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<series><title level="j" type="main">Science : (Washington, D.C.)</title>
<title level="j" type="abbreviated">Science : (Wash. D.C.)</title>
<idno type="ISSN">0036-8075</idno>
<imprint><date when="2007">2007</date>
</imprint>
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</sourceDesc>
<seriesStmt><title level="j" type="main">Science : (Washington, D.C.)</title>
<title level="j" type="abbreviated">Science : (Wash. D.C.)</title>
<idno type="ISSN">0036-8075</idno>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Mid Ocean Ridge Basalt</term>
<term>basalts</term>
<term>chemical composition</term>
<term>eclogite</term>
<term>flood basalts</term>
<term>forsterite</term>
<term>heterogeneity</term>
<term>komatiite</term>
<term>mantle</term>
<term>ocean-island basalts</term>
<term>oceanic crust</term>
<term>partial melting</term>
<term>peridotites</term>
<term>plate tectonics</term>
<term>pyroxenite</term>
<term>recycling</term>
<term>subduction zones</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Recyclage</term>
<term>Croûte océanique</term>
<term>Manteau</term>
<term>Tectonique plaque</term>
<term>Eclogite</term>
<term>Basalte</term>
<term>Zone subduction</term>
<term>Péridotite</term>
<term>Pyroxénite</term>
<term>Fusion partielle</term>
<term>Composition chimique</term>
<term>MORB</term>
<term>OIB</term>
<term>Basalte plateau</term>
<term>Komatiite</term>
<term>Forsterite</term>
<term>Hétérogénéité</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">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 olívine-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.</div>
</front>
</TEI>
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The amount of recycled crust in sources of mantle-derived melts

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

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