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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
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TitlePrecambrian evolution of the Quanji Block, northeastern margin of Tibet: Insights from zircon U-Pb and Lu-Hf isotope compositions
 
AuthorsChen, N1 2
Gong, S1
Sun, M2
Li, X1
Xia, X2
Wang, Q1
Wu, F3
Xu, P3
 
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
 
CitationJournal Of Asian Earth Sciences, 2009, v. 35 n. 3-4, p. 367-376 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.jseaes.2008.10.004
 
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.
 
ISSN1367-9120
2012 Impact Factor: 2.379
2012 SCImago Journal Rankings: 1.148
 
DOIhttp://dx.doi.org/10.1016/j.jseaes.2008.10.004
 
ISI Accession Number IDWOS:000266895800013
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorChen, N
 
dc.contributor.authorGong, S
 
dc.contributor.authorSun, M
 
dc.contributor.authorLi, X
 
dc.contributor.authorXia, X
 
dc.contributor.authorWang, Q
 
dc.contributor.authorWu, F
 
dc.contributor.authorXu, P
 
dc.date.accessioned2012-06-26T06:20:04Z
 
dc.date.available2012-06-26T06:20:04Z
 
dc.date.issued2009
 
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.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationJournal Of Asian Earth Sciences, 2009, v. 35 n. 3-4, p. 367-376 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.jseaes.2008.10.004
 
dc.identifier.doihttp://dx.doi.org/10.1016/j.jseaes.2008.10.004
 
dc.identifier.epage376
 
dc.identifier.hkuros156920
 
dc.identifier.isiWOS:000266895800013
 
dc.identifier.issn1367-9120
2012 Impact Factor: 2.379
2012 SCImago Journal Rankings: 1.148
 
dc.identifier.issue3-4
 
dc.identifier.scopuseid_2-s2.0-67349112142
 
dc.identifier.spage367
 
dc.identifier.urihttp://hdl.handle.net/10722/151283
 
dc.identifier.volume35
 
dc.languageeng
 
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaes
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofJournal of Asian Earth Sciences
 
dc.relation.referencesReferences in Scopus
 
dc.subjectCrustal evolution
 
dc.subjectMigmatite
 
dc.subjectNortheastern Tibetan Plateau
 
dc.subjectProtolith
 
dc.subjectQuanji block
 
dc.subjectZircon U-Pb and Lu-Hf isotopes
 
dc.titlePrecambrian evolution of the Quanji Block, northeastern margin of Tibet: Insights from zircon U-Pb and Lu-Hf isotope compositions
 
dc.typeArticle
 
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Author Affiliations
  1. China University of Geosciences
  2. The University of Hong Kong
  3. Institute of Geology and Geophysics Chinese Academy of Sciences