The Lithospheric Mantle beneath Continental Margins: Melting and Melt–Rock Reaction in Canadian Cordillera Xenoliths
Identifieur interne : 002696 ( Istex/Corpus ); précédent : 002695; suivant : 002697The Lithospheric Mantle beneath Continental Margins: Melting and Melt–Rock Reaction in Canadian Cordillera Xenoliths
Auteurs : Anne H. Peslier ; Don Francis ; John LuddenSource :
- Journal of Petrology [ 0022-3530 ] ; 2002-11.
English descriptors
Abstract
Seven alkali basalt centers in the southern Canadian Cordillera contain mantle xenolith suites that comprise spinel Cr-diopside peridotites, spinel augite-bearing wehrlites and orthopyroxene-poor lherzolites, and minor pyroxenites. The Cr-diopside peridotites appear to be residues of the extraction of Mg-rich basalts by up to 15% partial melting (median 5–10%) of a pyrolite-like source in the spinel stability field. The xenoliths are similar to other mantle xenolith suites derived from beneath convergent continental margins, but are less depleted, less oxidized, and have lower spinel mg-number than peridotites found in fore-arc settings. Their dominant high field strength element depleted character, however, is typical of arc lavas, and may suggest that fluids or melts circulating through the Canadian Cordillera lithosphere were subduction related. Modeling using MELTS is consistent with the augite-bearing xenoliths being formed by interaction between crystallizing alkaline melts and peridotite. Assimilation–fractional crystallization modeling suggests that the trace element patterns of liquids in equilibrium with the augite xenoliths may represent the initial melts that reacted with the peridotite. Moreover, the compositions of these melts are similar to those of some glasses observed in the mantle xenoliths. Melt–rock interaction may thus be a viable mechanism for the formation of Si- and alkali-rich glass in peridotites.
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DOI: 10.1093/petrology/43.11.2013
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ISTEX:D2AB29627435DE755D37D5F37C34CBA9F9921DC7Le document en format XML
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Peslier</name><affiliation><mods:affiliation>TEXAS CENTER FOR SUPERCONDUCTIVITY, UNIVERSITY OF HOUSTON, HOUSTON, TX 77204, USA</mods:affiliation></affiliation></author><author><name sortKey="Francis, Don" sort="Francis, Don" uniqKey="Francis D" first="Don" last="Francis">Don Francis</name><affiliation><mods:affiliation>EARTH AND PLANETARY SCIENCES, McGILL UNIVERSITY, MONTREAL, QUEBEC, H3A 2A7, CANADA</mods:affiliation></affiliation></author><author><name sortKey="Ludden, John" sort="Ludden, John" uniqKey="Ludden J" first="John" last="Ludden">John Ludden</name><affiliation><mods:affiliation>CRPG-CNRS, 15 RUE NOTRE-DAME DES PAUVRES, B.P. 20, 54501 VANDOEUVRE-LÈS-NANCY, FRANCE</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:D2AB29627435DE755D37D5F37C34CBA9F9921DC7</idno><date when="2002" year="2002">2002</date><idno type="doi">10.1093/petrology/43.11.2013</idno><idno type="url">https://api-v5.istex.fr/document/D2AB29627435DE755D37D5F37C34CBA9F9921DC7/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002696</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">002696</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">The Lithospheric Mantle beneath Continental Margins: Melting and Melt–Rock Reaction in Canadian Cordillera Xenoliths</title><author><name sortKey="Peslier, Anne H" sort="Peslier, Anne H" uniqKey="Peslier A" first="Anne H." last="Peslier">Anne H. Peslier</name><affiliation><mods:affiliation>TEXAS CENTER FOR SUPERCONDUCTIVITY, UNIVERSITY OF HOUSTON, HOUSTON, TX 77204, USA</mods:affiliation></affiliation></author><author><name sortKey="Francis, Don" sort="Francis, Don" uniqKey="Francis D" first="Don" last="Francis">Don Francis</name><affiliation><mods:affiliation>EARTH AND PLANETARY SCIENCES, McGILL UNIVERSITY, MONTREAL, QUEBEC, H3A 2A7, CANADA</mods:affiliation></affiliation></author><author><name sortKey="Ludden, John" sort="Ludden, John" uniqKey="Ludden J" first="John" last="Ludden">John Ludden</name><affiliation><mods:affiliation>CRPG-CNRS, 15 RUE NOTRE-DAME DES PAUVRES, B.P. 20, 54501 VANDOEUVRE-LÈS-NANCY, FRANCE</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Petrology</title><title level="j" type="abbrev">J. Petrology</title><idno type="ISSN">0022-3530</idno><idno type="eISSN">1460-2415</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2002-11">2002-11</date><biblScope unit="volume">43</biblScope><biblScope unit="issue">11</biblScope><biblScope unit="page" from="2013">2013</biblScope><biblScope unit="page" to="2047">2047</biblScope></imprint><idno type="ISSN">0022-3530</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-3530</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Canadian Cordillera</term><term>mantle xenolith</term><term>melt–rock reaction</term><term>peridotite</term><term>wehrlite</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Seven alkali basalt centers in the southern Canadian Cordillera contain mantle xenolith suites that comprise spinel Cr-diopside peridotites, spinel augite-bearing wehrlites and orthopyroxene-poor lherzolites, and minor pyroxenites. The Cr-diopside peridotites appear to be residues of the extraction of Mg-rich basalts by up to 15% partial melting (median 5–10%) of a pyrolite-like source in the spinel stability field. The xenoliths are similar to other mantle xenolith suites derived from beneath convergent continental margins, but are less depleted, less oxidized, and have lower spinel mg-number than peridotites found in fore-arc settings. Their dominant high field strength element depleted character, however, is typical of arc lavas, and may suggest that fluids or melts circulating through the Canadian Cordillera lithosphere were subduction related. Modeling using MELTS is consistent with the augite-bearing xenoliths being formed by interaction between crystallizing alkaline melts and peridotite. Assimilation–fractional crystallization modeling suggests that the trace element patterns of liquids in equilibrium with the augite xenoliths may represent the initial melts that reacted with the peridotite. Moreover, the compositions of these melts are similar to those of some glasses observed in the mantle xenoliths. Melt–rock interaction may thus be a viable mechanism for the formation of Si- and alkali-rich glass in peridotites.</div></front></TEI><istex><corpusName>oup</corpusName><author><json:item><name>ANNE H. PESLIER</name><affiliations><json:string>TEXAS CENTER FOR SUPERCONDUCTIVITY, UNIVERSITY OF HOUSTON, HOUSTON, TX 77204, USA</json:string></affiliations></json:item><json:item><name>DON FRANCIS</name><affiliations><json:string>EARTH AND PLANETARY SCIENCES, McGILL UNIVERSITY, MONTREAL, QUEBEC, H3A 2A7, CANADA</json:string></affiliations></json:item><json:item><name>JOHN LUDDEN</name><affiliations><json:string>CRPG-CNRS, 15 RUE NOTRE-DAME DES PAUVRES, B.P. 20, 54501 VANDOEUVRE-LÈS-NANCY, FRANCE</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Canadian Cordillera</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>mantle xenolith</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>peridotite</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>wehrlite</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>melt–rock reaction</value></json:item></subject><language><json:string>eng</json:string></language><originalGenre><json:string>research-article</json:string></originalGenre><abstract>Seven alkali basalt centers in the southern Canadian Cordillera contain mantle xenolith suites that comprise spinel Cr-diopside peridotites, spinel augite-bearing wehrlites and orthopyroxene-poor lherzolites, and minor pyroxenites. 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Moreover, the compositions of these melts are similar to those of some glasses observed in the mantle xenoliths. 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Petrology</title><idno type="pISSN">0022-3530</idno><idno type="eISSN">1460-2415</idno><idno type="PublisherID">petroj</idno><idno type="PublisherID-hwp">petrology</idno><idno type="PublisherID-nlm-ta">J Petrology</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2002-11"></date><biblScope unit="volume">43</biblScope><biblScope unit="issue">11</biblScope><biblScope unit="page" from="2013">2013</biblScope><biblScope unit="page" to="2047">2047</biblScope></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2002</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Seven alkali basalt centers in the southern Canadian Cordillera contain mantle xenolith suites that comprise spinel Cr-diopside peridotites, spinel augite-bearing wehrlites and orthopyroxene-poor lherzolites, and minor pyroxenites. The Cr-diopside peridotites appear to be residues of the extraction of Mg-rich basalts by up to 15% partial melting (median 5–10%) of a pyrolite-like source in the spinel stability field. The xenoliths are similar to other mantle xenolith suites derived from beneath convergent continental margins, but are less depleted, less oxidized, and have lower spinel mg-number than peridotites found in fore-arc settings. Their dominant high field strength element depleted character, however, is typical of arc lavas, and may suggest that fluids or melts circulating through the Canadian Cordillera lithosphere were subduction related. Modeling using MELTS is consistent with the augite-bearing xenoliths being formed by interaction between crystallizing alkaline melts and peridotite. Assimilation–fractional crystallization modeling suggests that the trace element patterns of liquids in equilibrium with the augite xenoliths may represent the initial melts that reacted with the peridotite. Moreover, the compositions of these melts are similar to those of some glasses observed in the mantle xenoliths. Melt–rock interaction may thus be a viable mechanism for the formation of Si- and alkali-rich glass in peridotites.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>KWD</head><item><term>Canadian Cordillera</term></item><item><term>mantle xenolith</term></item><item><term>peridotite</term></item><item><term>wehrlite</term></item><item><term>melt–rock reaction</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2002-11">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api-v5.istex.fr/document/D2AB29627435DE755D37D5F37C34CBA9F9921DC7/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="corpus oup" wicri:toSee="no header"><istex:xmlDeclaration>version="1.0" encoding="US-ASCII"</istex:xmlDeclaration><istex:docType PUBLIC="-//NLM//DTD Journal Publishing DTD v2.3 20070202//EN" URI="journalpublishing.dtd" name="istex:docType"></istex:docType><istex:document><article xml:lang="en" article-type="research-article"><front><journal-meta><journal-id journal-id-type="hwp">petrology</journal-id><journal-id journal-id-type="nlm-ta">J Petrology</journal-id><journal-id journal-id-type="publisher-id">petroj</journal-id><journal-title>Journal of Petrology</journal-title><abbrev-journal-title abbrev-type="publisher">J. Petrology</abbrev-journal-title><issn pub-type="ppub">0022-3530</issn><issn pub-type="epub">1460-2415</issn><publisher><publisher-name>Oxford University Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="other">087</article-id><article-id pub-id-type="doi">10.1093/petrology/43.11.2013</article-id><article-categories><subj-group subj-group-type="heading"><subject>ARTICLE</subject></subj-group></article-categories><title-group><article-title>The Lithospheric Mantle beneath Continental Margins: Melting and Melt–Rock Reaction in Canadian Cordillera Xenoliths</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>PESLIER</surname><given-names>ANNE H.</given-names></name><xref rid="AFF1">1</xref><xref rid="FN1">*</xref></contrib><contrib contrib-type="author"><name><surname>FRANCIS</surname><given-names>DON</given-names></name><xref rid="AFF2">2</xref></contrib><contrib contrib-type="author"><name><surname>LUDDEN</surname><given-names>JOHN</given-names></name><xref rid="AFF3">3</xref></contrib><aff id="AFF1"><sup>1</sup>TEXAS CENTER FOR SUPERCONDUCTIVITY, UNIVERSITY OF HOUSTON, HOUSTON, TX 77204, USA</aff><aff id="AFF2"><sup>2</sup>EARTH AND PLANETARY SCIENCES, McGILL UNIVERSITY, MONTREAL, QUEBEC, H3A 2A7, CANADA</aff><aff id="AFF3"><sup>3</sup>CRPG-CNRS, 15 RUE NOTRE-DAME DES PAUVRES, B.P. 20, 54501 VANDOEUVRE-LÈS-NANCY, FRANCE</aff></contrib-group><pub-date pub-type="ppub"><month>11</month><year>2002</year></pub-date><volume>43</volume><issue>11</issue><fpage>2013</fpage><lpage>2047</lpage><history><date date-type="accepted"><day>16</day><month>04</month><year>2002</year></date><date date-type="received"><day>24</day><month>02</month><year>2001</year></date></history><permissions><copyright-statement>Oxford University Press</copyright-statement><copyright-year>2002</copyright-year></permissions><abstract xml:lang="en"><p>Seven alkali basalt centers in the southern Canadian Cordillera contain mantle xenolith suites that comprise spinel Cr-diopside peridotites, spinel augite-bearing wehrlites and orthopyroxene-poor lherzolites, and minor pyroxenites. The Cr-diopside peridotites appear to be residues of the extraction of Mg-rich basalts by up to 15% partial melting (median 5–10%) of a pyrolite-like source in the spinel stability field. The xenoliths are similar to other mantle xenolith suites derived from beneath convergent continental margins, but are less depleted, less oxidized, and have lower spinel mg-number than peridotites found in fore-arc settings. Their dominant high field strength element depleted character, however, is typical of arc lavas, and may suggest that fluids or melts circulating through the Canadian Cordillera lithosphere were subduction related. Modeling using MELTS is consistent with the augite-bearing xenoliths being formed by interaction between crystallizing alkaline melts and peridotite. Assimilation–fractional crystallization modeling suggests that the trace element patterns of liquids in equilibrium with the augite xenoliths may represent the initial melts that reacted with the peridotite. Moreover, the compositions of these melts are similar to those of some glasses observed in the mantle xenoliths. Melt–rock interaction may thus be a viable mechanism for the formation of Si- and alkali-rich glass in peridotites.</p></abstract><kwd-group kwd-group-type="KWD" xml:lang="en"><kwd>Canadian Cordillera</kwd><kwd>mantle xenolith</kwd><kwd>peridotite</kwd><kwd>wehrlite</kwd><kwd>melt–rock reaction</kwd></kwd-group><custom-meta-wrap><custom-meta><meta-name>hwp-legacy-fpage</meta-name><meta-value>2013</meta-value></custom-meta><custom-meta><meta-name>hwp-legacy-dochead</meta-name><meta-value>ARTICLE</meta-value></custom-meta></custom-meta-wrap></article-meta></front></article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>The Lithospheric Mantle beneath Continental Margins: Melting and Melt–Rock Reaction in Canadian Cordillera Xenoliths</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>The Lithospheric Mantle beneath Continental Margins: Melting and Melt–Rock Reaction in Canadian Cordillera Xenoliths</title></titleInfo><name type="personal"><namePart type="given">ANNE H.</namePart><namePart type="family">PESLIER</namePart><affiliation>TEXAS CENTER FOR SUPERCONDUCTIVITY, UNIVERSITY OF HOUSTON, HOUSTON, TX 77204, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">DON</namePart><namePart type="family">FRANCIS</namePart><affiliation>EARTH AND PLANETARY SCIENCES, McGILL UNIVERSITY, MONTREAL, QUEBEC, H3A 2A7, CANADA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">JOHN</namePart><namePart type="family">LUDDEN</namePart><affiliation>CRPG-CNRS, 15 RUE NOTRE-DAME DES PAUVRES, B.P. 20, 54501 VANDOEUVRE-LÈS-NANCY, FRANCE</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="research-article"></genre><originInfo><publisher>Oxford University Press</publisher><dateIssued encoding="w3cdtf">2002-11</dateIssued><copyrightDate encoding="w3cdtf">2002</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">Seven alkali basalt centers in the southern Canadian Cordillera contain mantle xenolith suites that comprise spinel Cr-diopside peridotites, spinel augite-bearing wehrlites and orthopyroxene-poor lherzolites, and minor pyroxenites. The Cr-diopside peridotites appear to be residues of the extraction of Mg-rich basalts by up to 15% partial melting (median 5–10%) of a pyrolite-like source in the spinel stability field. The xenoliths are similar to other mantle xenolith suites derived from beneath convergent continental margins, but are less depleted, less oxidized, and have lower spinel mg-number than peridotites found in fore-arc settings. Their dominant high field strength element depleted character, however, is typical of arc lavas, and may suggest that fluids or melts circulating through the Canadian Cordillera lithosphere were subduction related. Modeling using MELTS is consistent with the augite-bearing xenoliths being formed by interaction between crystallizing alkaline melts and peridotite. Assimilation–fractional crystallization modeling suggests that the trace element patterns of liquids in equilibrium with the augite xenoliths may represent the initial melts that reacted with the peridotite. Moreover, the compositions of these melts are similar to those of some glasses observed in the mantle xenoliths. Melt–rock interaction may thus be a viable mechanism for the formation of Si- and alkali-rich glass in peridotites.</abstract><subject lang="en"><genre>KWD</genre><topic>Canadian Cordillera</topic><topic>mantle xenolith</topic><topic>peridotite</topic><topic>wehrlite</topic><topic>melt–rock reaction</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Petrology</title></titleInfo><titleInfo type="abbreviated"><title>J. Petrology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0022-3530</identifier><identifier type="eISSN">1460-2415</identifier><identifier type="PublisherID">petroj</identifier><identifier type="PublisherID-hwp">petrology</identifier><identifier type="PublisherID-nlm-ta">J Petrology</identifier><part><date>2002</date><detail type="volume"><caption>vol.</caption><number>43</number></detail><detail type="issue"><caption>no.</caption><number>11</number></detail><extent unit="pages"><start>2013</start><end>2047</end></extent></part></relatedItem><identifier type="istex">D2AB29627435DE755D37D5F37C34CBA9F9921DC7</identifier><identifier type="DOI">10.1093/petrology/43.11.2013</identifier><identifier type="local">087</identifier><accessCondition type="use and reproduction" contentType="copyright">Oxford University Press</accessCondition><recordInfo><recordContentSource>OUP</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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