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Article: LA-ICP-MS U-Pb zircon geochronology of the Yushulazi Group in the Eastern Block, North China Craton

TitleLA-ICP-MS U-Pb zircon geochronology of the Yushulazi Group in the Eastern Block, North China Craton
Authors
KeywordsCathodoluminescence
Geochronology
Inductively coupled plasma method
Uranium-lead dating
Asia
Issue Date2006
PublisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGR
Citation
International Geology Review, 2006, v. 48 n. 9, p. 828-840 How to Cite?
AbstractThe Paleoproterozoic Jiao-Liao-Ji belt in the North China craton is composed mainly of the Liaohe Group (and its equivalents) and the Liaoji Granites. They are uncomformably overlain by the sedimentary Yushulazi Group, which itself is overlain by the Neoproterozoic (0.9-0.8 Ga) Yongning Group. The Yushulazi Group has long been considered as a Proterozoic assemblage, but its depositional age has never been precisely constrained in terms of modern geochronology. Cathodoluminescence images reveal that most detrital zircon grains from this formation are characterized by concentric-oscillatory zoning, with comparatively low luminescence and high Th/U ratios, suggesting an igneous origin, whereas minor grains have structureless overgrowth or recrystallization rims that are characterized by low Th/U ratios, indicating a metamorphic origin. The results of LA-ICP-MS U-Pb zircon analyses show that the detrital zircon grains have concordant U-Pb ages of two populations - i.e., 1.05-1.37 Ga and 1.87-2.51 Ga - with an inherited zircon core giving a concordant age of 3.35 Ga. The U-Pb age range of 1.87-2.51 Ga is in good accordance with that of the Paleoproterozoic Liaohe Group and other basement rocks in the Eastern Block of the North China craton. Zircon ages of 1.05-1.31 Ga are, for the first time, reported for the Precambrian basement. The recognition of these Mesoproterozoic (1.05-1.31 Ga) igneous zircons from the Yushulazi Group indicate the existence of Grenvillian-aged magmatism in the Eastern Block of the North China craton. The Yushulazi Group must have deposited at some time between 1.05 Ga and 0.9 Ga, prior to sedimentation of the 0.9-0.8 Ga Yongning Group and it is not the upper part of the Paleoproterozoic Liaohe Group, as previously suggested. Copyright © 2006 by V. H. Winston & Son, Inc. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73030
ISSN
2015 Impact Factor: 2.365
2015 SCImago Journal Rankings: 1.248
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLuo, Yen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorLi, Sen_HK
dc.contributor.authorXia, Xen_HK
dc.date.accessioned2010-09-06T06:47:23Z-
dc.date.available2010-09-06T06:47:23Z-
dc.date.issued2006en_HK
dc.identifier.citationInternational Geology Review, 2006, v. 48 n. 9, p. 828-840en_HK
dc.identifier.issn0020-6814en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73030-
dc.description.abstractThe Paleoproterozoic Jiao-Liao-Ji belt in the North China craton is composed mainly of the Liaohe Group (and its equivalents) and the Liaoji Granites. They are uncomformably overlain by the sedimentary Yushulazi Group, which itself is overlain by the Neoproterozoic (0.9-0.8 Ga) Yongning Group. The Yushulazi Group has long been considered as a Proterozoic assemblage, but its depositional age has never been precisely constrained in terms of modern geochronology. Cathodoluminescence images reveal that most detrital zircon grains from this formation are characterized by concentric-oscillatory zoning, with comparatively low luminescence and high Th/U ratios, suggesting an igneous origin, whereas minor grains have structureless overgrowth or recrystallization rims that are characterized by low Th/U ratios, indicating a metamorphic origin. The results of LA-ICP-MS U-Pb zircon analyses show that the detrital zircon grains have concordant U-Pb ages of two populations - i.e., 1.05-1.37 Ga and 1.87-2.51 Ga - with an inherited zircon core giving a concordant age of 3.35 Ga. The U-Pb age range of 1.87-2.51 Ga is in good accordance with that of the Paleoproterozoic Liaohe Group and other basement rocks in the Eastern Block of the North China craton. Zircon ages of 1.05-1.31 Ga are, for the first time, reported for the Precambrian basement. The recognition of these Mesoproterozoic (1.05-1.31 Ga) igneous zircons from the Yushulazi Group indicate the existence of Grenvillian-aged magmatism in the Eastern Block of the North China craton. The Yushulazi Group must have deposited at some time between 1.05 Ga and 0.9 Ga, prior to sedimentation of the 0.9-0.8 Ga Yongning Group and it is not the upper part of the Paleoproterozoic Liaohe Group, as previously suggested. Copyright © 2006 by V. H. Winston & Son, Inc. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGRen_HK
dc.relation.ispartofInternational Geology Reviewen_HK
dc.subjectCathodoluminescence-
dc.subjectGeochronology-
dc.subjectInductively coupled plasma method-
dc.subjectUranium-lead dating-
dc.subjectAsia-
dc.titleLA-ICP-MS U-Pb zircon geochronology of the Yushulazi Group in the Eastern Block, North China Cratonen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0020-6814&volume=48&issue=9&spage=828&epage=840&date=SEP&atitle=LA-ICP-MS+U-Pb+zircon+geochronology+of+the+Yushulazi+Group+in+the+Eastern+Block,+North+China+Cratonen_HK
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.emailZhao, G: gzhao@hkucc.hku.hken_HK
dc.identifier.emailXia, X: xpxia@hotmail.comen_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.identifier.authorityXia, X=rp00815en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.2747/0020-6814.48.9.828en_HK
dc.identifier.scopuseid_2-s2.0-33748779535en_HK
dc.identifier.hkuros127560en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33748779535&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume48en_HK
dc.identifier.issue9en_HK
dc.identifier.spage828en_HK
dc.identifier.epage840en_HK
dc.identifier.isiWOS:000240249900004-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLuo, Y=49161174100en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridLi, S=8784176300en_HK
dc.identifier.scopusauthoridXia, X=35241486400en_HK

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