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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
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TitleStudy on U-Pb age and Hf isotope of zircons in the Bixiling peridotites, the Dabie ultrahigh-pressure, metamorphic belt
 
AuthorsZheng, JP1
Sun, M2
Griffin, WL3
Zhong, ZQ1
Tang, HY1
Zhang, ZH1
 
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
 
CitationActa 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.
 
ISSN1000-0569
2012 Impact Factor: 1.117
2012 SCImago Journal Rankings: 0.743
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorZheng, JP
 
dc.contributor.authorSun, M
 
dc.contributor.authorGriffin, WL
 
dc.contributor.authorZhong, ZQ
 
dc.contributor.authorTang, HY
 
dc.contributor.authorZhang, ZH
 
dc.date.accessioned2012-06-26T06:18:41Z
 
dc.date.available2012-06-26T06:18:41Z
 
dc.date.issued2007
 
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.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationActa Petrologica Sinica, 2007, v. 23 n. 2, p. 343-350 [How to Cite?]
 
dc.identifier.epage350
 
dc.identifier.hkuros153386
 
dc.identifier.hkuros144185
 
dc.identifier.issn1000-0569
2012 Impact Factor: 1.117
2012 SCImago Journal Rankings: 0.743
 
dc.identifier.issue2
 
dc.identifier.scopuseid_2-s2.0-34250339610
 
dc.identifier.spage343
 
dc.identifier.urihttp://hdl.handle.net/10722/151209
 
dc.identifier.volume23
 
dc.languageeng
 
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.aspx
 
dc.publisher.placeChina
 
dc.relation.ispartofActa Petrologica Sinica
 
dc.relation.referencesReferences in Scopus
 
dc.subjectBixiling
 
dc.subjectDabie Uhp Belt
 
dc.subjectEarly Mesozoic Exhumation
 
dc.subjectHf Isotope
 
dc.subjectNeoproterozoic Underplating
 
dc.subjectPeridotitic Zircon
 
dc.subjectU-Pb Dating
 
dc.subjectYangtze Continent
 
dc.titleStudy on U-Pb age and Hf isotope of zircons in the Bixiling peridotites, the Dabie ultrahigh-pressure, metamorphic belt
 
dc.typeArticle
 
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<contributor.author>Zhong, ZQ</contributor.author>
<contributor.author>Tang, HY</contributor.author>
<contributor.author>Zhang, ZH</contributor.author>
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<description.abstract>On 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 &#949;Hf(e.g. -2.9), have positive &#949;Hf(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 (&lt; 230Ma) in the Bixiling peridotites may mainly record the exhumation event of the Dabie orogen following the collision.</description.abstract>
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<subject>Bixiling</subject>
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<subject>Peridotitic Zircon</subject>
<subject>U-Pb Dating</subject>
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Author Affiliations
  1. China University of Geosciences
  2. The University of Hong Kong
  3. Macquarie University