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Article: Precambrian evolution of the Quanji Block, northeastern margin of Tibet: Insights from zircon U-Pb and Lu-Hf isotope compositions

TitlePrecambrian evolution of the Quanji Block, northeastern margin of Tibet: Insights from zircon U-Pb and Lu-Hf isotope compositions
Authors
KeywordsCrustal evolution
Migmatite
Northeastern Tibetan Plateau
Protolith
Quanji block
Zircon U-Pb and Lu-Hf isotopes
Issue Date2009
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaes
Citation
Journal Of Asian Earth Sciences, 2009, v. 35 n. 3-4, p. 367-376 How to Cite?
Abstract
The Quanji Block, a cratonic fragment, has been discovered between the north Qaidam HP-UHP metamorphic belt and the Qilian orogenic belt in northwestern China. This fragment has a pre-Neoproterozoic crystalline basement overlain unconformably by Neoproterozoic, Paleozoic and Mesozoic sedimentary strata. Pervasive anatexis of the basement produced extensive leucosomes in mafic and felsic migmatites. Zircons from the leucosomes yielded upper intercept and weighted mean 207Pb/ 206Pb ages of ∼1950 Ma, indicating that anatexis occurred in the late Paleoproterozoic, during regional high-grade metamorphism. Hf model ages (T DM2) for these zircons suggest that protoliths of the felsic and mafic migmatites had crustal residence time of ∼2.80 and ∼2.65 Ga, respectively. The basement rocks of the Quanji Block are compositionally similar to those of the Yangtze Craton, and may have been involved in assembly of the late Paleoproterozoic global supercontinent, Columbia. © 2008 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151283
ISSN
2013 Impact Factor: 2.831
2013 SCImago Journal Rankings: 1.475
ISI Accession Number ID
References

 

Author Affiliations
  1. China University of Geosciences
  2. The University of Hong Kong
  3. Institute of Geology and Geophysics Chinese Academy of Sciences
DC FieldValueLanguage
dc.contributor.authorChen, Nen_HK
dc.contributor.authorGong, Sen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorLi, Xen_HK
dc.contributor.authorXia, Xen_HK
dc.contributor.authorWang, Qen_HK
dc.contributor.authorWu, Fen_HK
dc.contributor.authorXu, Pen_HK
dc.date.accessioned2012-06-26T06:20:04Z-
dc.date.available2012-06-26T06:20:04Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal Of Asian Earth Sciences, 2009, v. 35 n. 3-4, p. 367-376en_HK
dc.identifier.issn1367-9120en_HK
dc.identifier.urihttp://hdl.handle.net/10722/151283-
dc.description.abstractThe Quanji Block, a cratonic fragment, has been discovered between the north Qaidam HP-UHP metamorphic belt and the Qilian orogenic belt in northwestern China. This fragment has a pre-Neoproterozoic crystalline basement overlain unconformably by Neoproterozoic, Paleozoic and Mesozoic sedimentary strata. Pervasive anatexis of the basement produced extensive leucosomes in mafic and felsic migmatites. Zircons from the leucosomes yielded upper intercept and weighted mean 207Pb/ 206Pb ages of ∼1950 Ma, indicating that anatexis occurred in the late Paleoproterozoic, during regional high-grade metamorphism. Hf model ages (T DM2) for these zircons suggest that protoliths of the felsic and mafic migmatites had crustal residence time of ∼2.80 and ∼2.65 Ga, respectively. The basement rocks of the Quanji Block are compositionally similar to those of the Yangtze Craton, and may have been involved in assembly of the late Paleoproterozoic global supercontinent, Columbia. © 2008 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaesen_HK
dc.relation.ispartofJournal of Asian Earth Sciencesen_HK
dc.subjectCrustal evolutionen_HK
dc.subjectMigmatiteen_HK
dc.subjectNortheastern Tibetan Plateauen_HK
dc.subjectProtolithen_HK
dc.subjectQuanji blocken_HK
dc.subjectZircon U-Pb and Lu-Hf isotopesen_HK
dc.titlePrecambrian evolution of the Quanji Block, northeastern margin of Tibet: Insights from zircon U-Pb and Lu-Hf isotope compositionsen_HK
dc.typeArticleen_HK
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.emailXia, X: xpxia@hotmail.comen_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityXia, X=rp00815en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.jseaes.2008.10.004en_HK
dc.identifier.scopuseid_2-s2.0-67349112142en_HK
dc.identifier.hkuros156920-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-67349112142&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume35en_HK
dc.identifier.issue3-4en_HK
dc.identifier.spage367en_HK
dc.identifier.epage376en_HK
dc.identifier.isiWOS:000266895800013-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridChen, N=12796732200en_HK
dc.identifier.scopusauthoridGong, S=15829334300en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridLi, X=35228322300en_HK
dc.identifier.scopusauthoridXia, X=35241486400en_HK
dc.identifier.scopusauthoridWang, Q=12796689600en_HK
dc.identifier.scopusauthoridWu, F=40561925600en_HK
dc.identifier.scopusauthoridXu, P=49161291100en_HK

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