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
2011 Impact Factor: 2.152
2011 SCImago Journal Rankings: 0.062
DOIhttp://dx.doi.org/10.1016/j.jseaes.2008.10.004
ISI Accession Number IDWOS:000266895800013
ReferencesReferences in Scopus
DC Field
Value
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
2011 Impact Factor: 2.152
2011 SCImago Journal Rankings: 0.062
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
Author Affiliations
  1. China University of Geosciences
  2. The University of Hong Kong
  3. Institute of Geology and Geophysics Chinese Academy of Sciences