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Article: Petrology and geochemistry of Zijinshan alkaline intrusive complex in Shanxi Province, western North China Craton: Implication for magma mixing of different sources in an extensional regime

TitlePetrology and geochemistry of Zijinshan alkaline intrusive complex in Shanxi Province, western North China Craton: Implication for magma mixing of different sources in an extensional regime
Authors
KeywordsAlkaline complex
Crust-mantle interaction
Monzonite
Nepheline syenite
North China Craton
Issue Date2007
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithos
Citation
Lithos, 2007, v. 98 n. 1-4, p. 45-66 How to Cite?
AbstractIn situ zircon U-Pb ages and Hf isotopic compositions and whole rock geochemical and Sr-Nd-Pb isotopic data are presented for the Zijinshan alkaline intrusive complex from the Shanxi Province, western North China Craton. Salic rocks dominate the complex with the monzonite occurring in the outermost and pseudoleucite phonolitic breccia in the center. The intrusion took place 127 Ma ago with the earliest emplacement of monzonite and the termination of cryptoexplosive pseudoleucite phonolitic breccia. All rocks from this complex show LREE enrichment and HFSE depletion and exhibit enriched to depleted Sr-Nd isotopic features. The presence of inherited zircons and enriched Hf isotopic compositions in zircon rims, along with the enriched whole rock Sr-Nd isotopic compositions, indicate that the monzonite was formed through the mixing of lithospheric mantle-derived magma with lower crust-derived melts. The diopside syenite and nepheline-bearing diopside syenite are more depleted than the monzonite in terms of the Sr and Nd isotopes, together with their very high concentrations of LILE, we proposed that they originated from a mixed mantle source of enriched lithospheric mantle and depleted asthenosphere. The nepheline syenite has very low concentrations of MgO, Ni, Cr, suggesting that the magma underwent significant crystal fractionation. The most depleted Sr and Nd isotopic compositions ((87Sr/86Sr)i = 0.7036-0.7042, εNd(t) = - 0.2-0.3) among all rock types indicate a great contribution of asthenosphere to the nepheline syenite. The Zijinshan complex and its related crust-mantle interaction occurred in an extensional environment which resulted in continuously asthenospheric upwelling. Such an extensional environment might have been developed during the post-orogenic stage of the Late Paleozoic amalgamation of North China Craton with Mongolian continents and subsequent Mongol-Okhotsk ocean closure. © 2007 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/72923
ISSN
2015 Impact Factor: 3.723
2015 SCImago Journal Rankings: 2.920
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYing, Jen_HK
dc.contributor.authorZhang, Hen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorTang, Yen_HK
dc.contributor.authorZhou, Xen_HK
dc.contributor.authorLiu, Xen_HK
dc.date.accessioned2010-09-06T06:46:23Z-
dc.date.available2010-09-06T06:46:23Z-
dc.date.issued2007en_HK
dc.identifier.citationLithos, 2007, v. 98 n. 1-4, p. 45-66en_HK
dc.identifier.issn0024-4937en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72923-
dc.description.abstractIn situ zircon U-Pb ages and Hf isotopic compositions and whole rock geochemical and Sr-Nd-Pb isotopic data are presented for the Zijinshan alkaline intrusive complex from the Shanxi Province, western North China Craton. Salic rocks dominate the complex with the monzonite occurring in the outermost and pseudoleucite phonolitic breccia in the center. The intrusion took place 127 Ma ago with the earliest emplacement of monzonite and the termination of cryptoexplosive pseudoleucite phonolitic breccia. All rocks from this complex show LREE enrichment and HFSE depletion and exhibit enriched to depleted Sr-Nd isotopic features. The presence of inherited zircons and enriched Hf isotopic compositions in zircon rims, along with the enriched whole rock Sr-Nd isotopic compositions, indicate that the monzonite was formed through the mixing of lithospheric mantle-derived magma with lower crust-derived melts. The diopside syenite and nepheline-bearing diopside syenite are more depleted than the monzonite in terms of the Sr and Nd isotopes, together with their very high concentrations of LILE, we proposed that they originated from a mixed mantle source of enriched lithospheric mantle and depleted asthenosphere. The nepheline syenite has very low concentrations of MgO, Ni, Cr, suggesting that the magma underwent significant crystal fractionation. The most depleted Sr and Nd isotopic compositions ((87Sr/86Sr)i = 0.7036-0.7042, εNd(t) = - 0.2-0.3) among all rock types indicate a great contribution of asthenosphere to the nepheline syenite. The Zijinshan complex and its related crust-mantle interaction occurred in an extensional environment which resulted in continuously asthenospheric upwelling. Such an extensional environment might have been developed during the post-orogenic stage of the Late Paleozoic amalgamation of North China Craton with Mongolian continents and subsequent Mongol-Okhotsk ocean closure. © 2007 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithosen_HK
dc.relation.ispartofLithosen_HK
dc.rightsLithos. Copyright © Elsevier BV.en_HK
dc.subjectAlkaline complexen_HK
dc.subjectCrust-mantle interactionen_HK
dc.subjectMonzoniteen_HK
dc.subjectNepheline syeniteen_HK
dc.subjectNorth China Cratonen_HK
dc.titlePetrology and geochemistry of Zijinshan alkaline intrusive complex in Shanxi Province, western North China Craton: Implication for magma mixing of different sources in an extensional regimeen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0024-4937&volume=98&spage=45&epage=66&date=2007&atitle=Petrology+and+geochemistry+of+Zijinshan+alkaline+intrusive+complex+in+Shanxi+Province,+western+North+China+Craton:+implication+for+magma+mixing+of+different+sources+in+an+extensional+regime.+en_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.lithos.2007.02.001en_HK
dc.identifier.scopuseid_2-s2.0-34548561692en_HK
dc.identifier.hkuros144178en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34548561692&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume98en_HK
dc.identifier.issue1-4en_HK
dc.identifier.spage45en_HK
dc.identifier.epage66en_HK
dc.identifier.isiWOS:000250247200003-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridYing, J=7102534977en_HK
dc.identifier.scopusauthoridZhang, H=7409201720en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridTang, Y=14424481100en_HK
dc.identifier.scopusauthoridZhou, X=48961487000en_HK
dc.identifier.scopusauthoridLiu, X=36572290400en_HK

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