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Article: Polybaric partial melting in the continental mantle: Evidence from mantle xenoliths from Qilin, Guangdong province

TitlePolybaric partial melting in the continental mantle: Evidence from mantle xenoliths from Qilin, Guangdong province
Authors
KeywordsMantle Xenoliths
Polybaric Melting
Qilin
Trace Element
Issue Date2001
PublisherScience China Press. The Journal's web site is located at http://www.springerlink.com/content/1001-6538/
Citation
Chinese Science Bulletin, 2001, v. 46 n. 20, p. 1732-1736 How to Cite?
AbstractThe extremely low Ti content (160-245 μg/g) in clinopyroxene in some spinel peridotites from Qilin, South China is indicative of high degree of partial melting, inconsistent with their relatively high clinopyroxene modes (7.4%-12.4%). These clinopyroxenes show fractionated HREE patterns ((Gd/Yb) n<0.2), suggesting the involvement of garnet in the melting regime. These REE patterns can be modeled as residues of 22%-23% fractional melting from a primitive mantle, first in garnet stability field (12%) then continuing in spinel stability field (10%-11%) after breakdown of garnet to pyroxenes and spinel. Such a polybaric melting suggests the lithospheric thinning and rapid mantle upwelling in south China during the Cenozoic. This is consistent with the dominant MORB-OIB isotopic signature and high thermal gradient of the lithospheric mantle in this region, and supports the contention that the formation of South China Sea basin is related to southward migration of continental lithosphere extension, rather than passive back-arc basin.
Persistent Identifierhttp://hdl.handle.net/10722/151076
ISSN
2015 Impact Factor: 1.789
References

 

DC FieldValueLanguage
dc.contributor.authorXu, Yen_US
dc.contributor.authorYan, Wen_US
dc.contributor.authorSun, Men_US
dc.contributor.authorLiu, Yen_US
dc.contributor.authorHe, Zen_US
dc.contributor.authorShi, Len_US
dc.date.accessioned2012-06-26T06:16:48Z-
dc.date.available2012-06-26T06:16:48Z-
dc.date.issued2001en_US
dc.identifier.citationChinese Science Bulletin, 2001, v. 46 n. 20, p. 1732-1736en_US
dc.identifier.issn1001-6538en_US
dc.identifier.urihttp://hdl.handle.net/10722/151076-
dc.description.abstractThe extremely low Ti content (160-245 μg/g) in clinopyroxene in some spinel peridotites from Qilin, South China is indicative of high degree of partial melting, inconsistent with their relatively high clinopyroxene modes (7.4%-12.4%). These clinopyroxenes show fractionated HREE patterns ((Gd/Yb) n<0.2), suggesting the involvement of garnet in the melting regime. These REE patterns can be modeled as residues of 22%-23% fractional melting from a primitive mantle, first in garnet stability field (12%) then continuing in spinel stability field (10%-11%) after breakdown of garnet to pyroxenes and spinel. Such a polybaric melting suggests the lithospheric thinning and rapid mantle upwelling in south China during the Cenozoic. This is consistent with the dominant MORB-OIB isotopic signature and high thermal gradient of the lithospheric mantle in this region, and supports the contention that the formation of South China Sea basin is related to southward migration of continental lithosphere extension, rather than passive back-arc basin.en_US
dc.languageengen_US
dc.publisherScience China Press. The Journal's web site is located at http://www.springerlink.com/content/1001-6538/en_US
dc.relation.ispartofChinese Science Bulletinen_US
dc.subjectMantle Xenolithsen_US
dc.subjectPolybaric Meltingen_US
dc.subjectQilinen_US
dc.subjectTrace Elementen_US
dc.titlePolybaric partial melting in the continental mantle: Evidence from mantle xenoliths from Qilin, Guangdong provinceen_US
dc.typeArticleen_US
dc.identifier.emailSun, M:minsun@hku.hken_US
dc.identifier.authoritySun, M=rp00780en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0035677393en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035677393&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume46en_US
dc.identifier.issue20en_US
dc.identifier.spage1732en_US
dc.identifier.epage1736en_US
dc.publisher.placeChinaen_US
dc.identifier.scopusauthoridXu, Y=7406444987en_US
dc.identifier.scopusauthoridYan, W=16159355700en_US
dc.identifier.scopusauthoridSun, M=25932315800en_US
dc.identifier.scopusauthoridLiu, Y=7410220698en_US
dc.identifier.scopusauthoridHe, Z=35310708000en_US
dc.identifier.scopusauthoridShi, L=23028695600en_US

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