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Article: Study on U-Pb age and Hf isotope of zircons in the Bixiling peridotites, the Dabie ultrahigh-pressure, metamorphic belt

TitleStudy on U-Pb age and Hf isotope of zircons in the Bixiling peridotites, the Dabie ultrahigh-pressure, metamorphic belt
Authors
KeywordsBixiling
Dabie Uhp Belt
Early Mesozoic Exhumation
Hf Isotope
Neoproterozoic Underplating
Peridotitic Zircon
U-Pb Dating
Yangtze Continent
Issue Date2007
PublisherChinese Academy of Sciences, Institute of Geology and Geophysics. The Journal's web site is located at http://www.ysxb.ac.cn/ysxb/ch/index.aspx
Citation
Acta Petrologica Sinica, 2007, v. 23 n. 2, p. 343-350 How to Cite?
AbstractOn the basis of the form and internal structure of the Bixiling peridotitic zircons from the southern Dabie Orogen, in situ U-Pb ages and Hf isotope of them were analyzed. The zircons are mainly recrystalizated/metamorphic growth (210-220Ma) with minor relics of magmatism. One grain with high Th/U ratio gives a nearly concordant age of 646Ma, representing the minimum age estimate of magmatism. The intrusion age can be obtained by the upper intercept of 745Ma. The ages of 210-220Ma record the growth of zircons during exhumation of the Dabie ultrahigh-pressure belt. The Bixiling peridotitic zircons, except few grains with negative εHf(e.g. -2.9), have positive εHf(high up to + 8.1) and Neoproterozoic depleted mantle model ages (mean 0.8Ga). The data suggest that the initial materials of the Bixiling peridotites are Neoproterozoic cumulates beneath the northern margin of the Yangtze craton. The magma derived from the depleted asthenospheric mantle, erupted at the lower part of the continental crust (e.g. underplating) and assimilated a slight proportions of pre-existing crust. The protolith of the Bixiling peridotites experienced complex processes accompanying with subduction of the Yangtze lithosphere, collision with the North China craton, and exhumation of the Dabie-Sulu orogen. The metasomatic growth or recrystalization of zircons (< 230Ma) in the Bixiling peridotites may mainly record the exhumation event of the Dabie orogen following the collision.
Persistent Identifierhttp://hdl.handle.net/10722/151209
ISSN
2014 Impact Factor: 1.455
2014 SCImago Journal Rankings: 0.924
References

 

DC FieldValueLanguage
dc.contributor.authorZheng, JPen_US
dc.contributor.authorSun, Men_US
dc.contributor.authorGriffin, WLen_US
dc.contributor.authorZhong, ZQen_US
dc.contributor.authorTang, HYen_US
dc.contributor.authorZhang, ZHen_US
dc.date.accessioned2012-06-26T06:18:41Z-
dc.date.available2012-06-26T06:18:41Z-
dc.date.issued2007en_US
dc.identifier.citationActa Petrologica Sinica, 2007, v. 23 n. 2, p. 343-350en_US
dc.identifier.issn1000-0569en_US
dc.identifier.urihttp://hdl.handle.net/10722/151209-
dc.description.abstractOn the basis of the form and internal structure of the Bixiling peridotitic zircons from the southern Dabie Orogen, in situ U-Pb ages and Hf isotope of them were analyzed. The zircons are mainly recrystalizated/metamorphic growth (210-220Ma) with minor relics of magmatism. One grain with high Th/U ratio gives a nearly concordant age of 646Ma, representing the minimum age estimate of magmatism. The intrusion age can be obtained by the upper intercept of 745Ma. The ages of 210-220Ma record the growth of zircons during exhumation of the Dabie ultrahigh-pressure belt. The Bixiling peridotitic zircons, except few grains with negative εHf(e.g. -2.9), have positive εHf(high up to + 8.1) and Neoproterozoic depleted mantle model ages (mean 0.8Ga). The data suggest that the initial materials of the Bixiling peridotites are Neoproterozoic cumulates beneath the northern margin of the Yangtze craton. The magma derived from the depleted asthenospheric mantle, erupted at the lower part of the continental crust (e.g. underplating) and assimilated a slight proportions of pre-existing crust. The protolith of the Bixiling peridotites experienced complex processes accompanying with subduction of the Yangtze lithosphere, collision with the North China craton, and exhumation of the Dabie-Sulu orogen. The metasomatic growth or recrystalization of zircons (< 230Ma) in the Bixiling peridotites may mainly record the exhumation event of the Dabie orogen following the collision.en_US
dc.languageengen_US
dc.publisherChinese Academy of Sciences, Institute of Geology and Geophysics. The Journal's web site is located at http://www.ysxb.ac.cn/ysxb/ch/index.aspxen_US
dc.relation.ispartofActa Petrologica Sinicaen_US
dc.subjectBixilingen_US
dc.subjectDabie Uhp Belten_US
dc.subjectEarly Mesozoic Exhumationen_US
dc.subjectHf Isotopeen_US
dc.subjectNeoproterozoic Underplatingen_US
dc.subjectPeridotitic Zirconen_US
dc.subjectU-Pb Datingen_US
dc.subjectYangtze Continenten_US
dc.titleStudy on U-Pb age and Hf isotope of zircons in the Bixiling peridotites, the Dabie ultrahigh-pressure, metamorphic belten_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-s2.0-34250339610en_US
dc.identifier.hkuros153386-
dc.identifier.hkuros144185-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34250339610&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume23en_US
dc.identifier.issue2en_US
dc.identifier.spage343en_US
dc.identifier.epage350en_US
dc.publisher.placeChinaen_US
dc.identifier.scopusauthoridZheng, JP=35212471400en_US
dc.identifier.scopusauthoridSun, M=25932315800en_US
dc.identifier.scopusauthoridGriffin, WL=35229299300en_US
dc.identifier.scopusauthoridZhong, ZQ=7402336532en_US
dc.identifier.scopusauthoridTang, HY=8609003600en_US
dc.identifier.scopusauthoridZhang, ZH=8409763800en_US

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