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Article: Early Paleozoic ridge subduction in the Chinese Altai: Insight from the abrupt change in zircon Hf isotopic compositions

TitleEarly Paleozoic ridge subduction in the Chinese Altai: Insight from the abrupt change in zircon Hf isotopic compositions
Authors
KeywordsAltai
Granite
Hf isotope
Paleozoic
Ridge subduction
Issue Date2009
PublisherScience in China Press. The Journal's web site is located at http://link.springer.com.eproxy1.lib.hku.hk/journal/11430
Citation
Science In China, Series D: Earth Sciences, 2009, v. 52 n. 9, p. 1345-1358 How to Cite?
AbstractZircons were separated from granitoids, gneisses, and sedimentary rocks of the Chinese Altai. Those with igneous characteristics yielded U-Pb ages of 280 - 2800 Ma, recording a long history of magmatic activity in the region. Zircon Hf isotopic compositions show an abrupt change at ∼420 Ma, indicating that prior to that time the magmas came from both ancient and juvenile sources, whereas younger magmas were derived mainly from juvenile material. This may imply that the lithosphere was significantly modified in composition by a rapid addition of melt from the mantle. We suggest that this dramatic change was due to the onset of ridge subduction, which can account not only for the formation of voluminous granitoids, mafic rocks with complex compositions, and the association of adakite + high-Mg andesite + boninite + Nb-enriched basalt, but also for the coeval high-T, low-P metamorphism. © Science in China Press and Springer-Verlag GmbH 2009.
Persistent Identifierhttp://hdl.handle.net/10722/58666
ISSN
2011 Impact Factor: 1.588
ISI Accession Number ID
Funding AgencyGrant Number
National Basic Research Program of China2007CB411308
Hong Kong RGCHKU704307P
704004P
National Natural Science Foundation of China40772130
40803009
CAS/SAFEA International Partnership Program for Creative Research Teams
Funding Information:

Supported by National Basic Research Program of China (Grant No. 2007CB411308), Hong Kong RGC Grants (Grant Nos. HKU704307P and 704004P), National Natural Science Foundation of China (Grant Nos. 40772130, 40803009) and CAS/SAFEA International Partnership Program for Creative Research Teams

References

 

DC FieldValueLanguage
dc.contributor.authorSun, Men_HK
dc.contributor.authorLong, XPen_HK
dc.contributor.authorCai, KDen_HK
dc.contributor.authorJiang, YDen_HK
dc.contributor.authorWang, BYen_HK
dc.contributor.authorYuan, Cen_HK
dc.contributor.authorZhao, GCen_HK
dc.contributor.authorXiao, WJen_HK
dc.contributor.authorWu, FYen_HK
dc.date.accessioned2010-05-31T03:34:41Z-
dc.date.available2010-05-31T03:34:41Z-
dc.date.issued2009en_HK
dc.identifier.citationScience In China, Series D: Earth Sciences, 2009, v. 52 n. 9, p. 1345-1358en_HK
dc.identifier.issn1006-9313en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58666-
dc.description.abstractZircons were separated from granitoids, gneisses, and sedimentary rocks of the Chinese Altai. Those with igneous characteristics yielded U-Pb ages of 280 - 2800 Ma, recording a long history of magmatic activity in the region. Zircon Hf isotopic compositions show an abrupt change at ∼420 Ma, indicating that prior to that time the magmas came from both ancient and juvenile sources, whereas younger magmas were derived mainly from juvenile material. This may imply that the lithosphere was significantly modified in composition by a rapid addition of melt from the mantle. We suggest that this dramatic change was due to the onset of ridge subduction, which can account not only for the formation of voluminous granitoids, mafic rocks with complex compositions, and the association of adakite + high-Mg andesite + boninite + Nb-enriched basalt, but also for the coeval high-T, low-P metamorphism. © Science in China Press and Springer-Verlag GmbH 2009.en_HK
dc.languageengen_HK
dc.publisherScience in China Press. The Journal's web site is located at http://link.springer.com.eproxy1.lib.hku.hk/journal/11430zh_HK
dc.relation.ispartofScience in China, Series D: Earth Sciencesen_HK
dc.subjectAltaien_HK
dc.subjectGraniteen_HK
dc.subjectHf isotopeen_HK
dc.subjectPaleozoicen_HK
dc.subjectRidge subductionen_HK
dc.titleEarly Paleozoic ridge subduction in the Chinese Altai: Insight from the abrupt change in zircon Hf isotopic compositionsen_HK
dc.typeArticleen_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.emailZhao, GC:gzhao@hkucc.hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityZhao, GC=rp00842en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s11430-009-0110-3en_HK
dc.identifier.scopuseid_2-s2.0-70349682425en_HK
dc.identifier.hkuros161209en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70349682425&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume52en_HK
dc.identifier.issue9en_HK
dc.identifier.spage1345en_HK
dc.identifier.epage1358en_HK
dc.identifier.isiWOS:000269974200008-
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridLong, XP=14012199100en_HK
dc.identifier.scopusauthoridCai, KD=14011943800en_HK
dc.identifier.scopusauthoridJiang, YD=35105097600en_HK
dc.identifier.scopusauthoridWang, BY=35106061400en_HK
dc.identifier.scopusauthoridYuan, C=35241599200en_HK
dc.identifier.scopusauthoridZhao, GC=7403296321en_HK
dc.identifier.scopusauthoridXiao, WJ=7202456615en_HK
dc.identifier.scopusauthoridWu, FY=40561925600en_HK
dc.identifier.citeulike5485888-

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