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Article: Detrital zircon age and Hf isotopic studies for metasedimentary rocks from the Chinese Altai: Implications for the Early Paleozoic tectonic evolution of the Central Asian Orogenic Belt

TitleDetrital zircon age and Hf isotopic studies for metasedimentary rocks from the Chinese Altai: Implications for the Early Paleozoic tectonic evolution of the Central Asian Orogenic Belt
Authors
Issue Date2007
PublisherAmerican Geophysical Union. The Journal's web site is located at http://www.agu.org/journals/tc/
Citation
Tectonics, 2007, v. 26 n. 5 How to Cite?
AbstractThe Chinese Altai, a typical region of the Central Asian Orogenic Belt (CAOB), has been envisaged as subduction-accretion complex or Precambrian microcontinent. Thick metasedimentary rocks crop out extensively in the Central Altai and Qiongkuer domains, but their depositional age is not well constrained. Most workers have regarded these sedimentary rocks as passive continental margin sediments deposited on a Precambrian microcontinent. However, our studies of U-Pb and Hf isotopes of detrital zircons separated from these rocks reveal that a predominant population has 206Pb/ 238U ages between 460 and 540 Ma and most grains of this population possess positive ε Hf(t) values. Zircons of the population have oscillatory zoning, possess high Th/U ratios, and are enhedral to subhedral crystals with sharp edges, showing short distance of transportation from an igneous provenance. The above results indicate that these metasedimentary rocks were deposited on an active continental margin not prior to the Middle Ordovician. Therefore the Chinese Altai orogen was an active continental margin in the Early Paleozoic, which is inconsistent with a Precambrian microcontinent model and reveals an arc accretionary history. Copyright 2007 by the American Geophysical Union.
Persistent Identifierhttp://hdl.handle.net/10722/73024
ISSN
2015 Impact Factor: 3.75
2015 SCImago Journal Rankings: 2.628
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLong, Xen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorYuan, Cen_HK
dc.contributor.authorXiao, Wen_HK
dc.contributor.authorLin, Sen_HK
dc.contributor.authorWu, Fen_HK
dc.contributor.authorXia, Xen_HK
dc.contributor.authorCai, Ken_HK
dc.date.accessioned2010-09-06T06:47:20Z-
dc.date.available2010-09-06T06:47:20Z-
dc.date.issued2007en_HK
dc.identifier.citationTectonics, 2007, v. 26 n. 5en_HK
dc.identifier.issn0278-7407en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73024-
dc.description.abstractThe Chinese Altai, a typical region of the Central Asian Orogenic Belt (CAOB), has been envisaged as subduction-accretion complex or Precambrian microcontinent. Thick metasedimentary rocks crop out extensively in the Central Altai and Qiongkuer domains, but their depositional age is not well constrained. Most workers have regarded these sedimentary rocks as passive continental margin sediments deposited on a Precambrian microcontinent. However, our studies of U-Pb and Hf isotopes of detrital zircons separated from these rocks reveal that a predominant population has 206Pb/ 238U ages between 460 and 540 Ma and most grains of this population possess positive ε Hf(t) values. Zircons of the population have oscillatory zoning, possess high Th/U ratios, and are enhedral to subhedral crystals with sharp edges, showing short distance of transportation from an igneous provenance. The above results indicate that these metasedimentary rocks were deposited on an active continental margin not prior to the Middle Ordovician. Therefore the Chinese Altai orogen was an active continental margin in the Early Paleozoic, which is inconsistent with a Precambrian microcontinent model and reveals an arc accretionary history. Copyright 2007 by the American Geophysical Union.en_HK
dc.languageengen_HK
dc.publisherAmerican Geophysical Union. The Journal's web site is located at http://www.agu.org/journals/tc/en_HK
dc.relation.ispartofTectonicsen_HK
dc.rightsTECTONICS. Copyright © American Geophysical Union.en_HK
dc.titleDetrital zircon age and Hf isotopic studies for metasedimentary rocks from the Chinese Altai: Implications for the Early Paleozoic tectonic evolution of the Central Asian Orogenic Belten_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0278-7407&volume=26&spage=TC5015 &epage=&date=2007&atitle=Detrital+zircon+age+and+hf+isotopic+studies+for+metasedimentary+rocks+from+the+chinese+altai:+Implications+for+the+early+paleozoic+tectonic+evolution+of+the+central+Asian+orogenic+belten_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_fulltext-
dc.identifier.doi10.1029/2007TC002128en_HK
dc.identifier.scopuseid_2-s2.0-37549039433en_HK
dc.identifier.hkuros142867en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-37549039433&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume26en_HK
dc.identifier.issue5en_HK
dc.identifier.isiWOS:000250452100001-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLong, X=14012199100en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridYuan, C=35241599200en_HK
dc.identifier.scopusauthoridXiao, W=7202456615en_HK
dc.identifier.scopusauthoridLin, S=7407611598en_HK
dc.identifier.scopusauthoridWu, F=40561925600en_HK
dc.identifier.scopusauthoridXia, X=35241486400en_HK
dc.identifier.scopusauthoridCai, K=14011943800en_HK

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