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Article: A comparison of U-Pb and Hf isotopic compositions of detrital zircons from the North and South Liaohe Groups: Constraints on the evolution of the Jiao-Liao-Ji Belt, North China Craton

TitleA comparison of U-Pb and Hf isotopic compositions of detrital zircons from the North and South Liaohe Groups: Constraints on the evolution of the Jiao-Liao-Ji Belt, North China Craton
Authors
KeywordsDetrital zircon
Hf isotope
LA-ICP-MS
Liaohe Group
North China Craton
U-Pb age
Issue Date2008
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2008, v. 163 n. 3-4, p. 279-306 How to Cite?
AbstractThe Jiao-Liao-Ji orogenic belt is one of the important Paleoproterozoic mobile belts in the North China Craton (NCC) and its central segment consists of the North and South Liaohe Groups and the Liaoji Granitoids. The North and South Liaohe Groups consist of sedimentary and volcanic successions metamorphosed from greenschist to lower amphibolite facies, and the Liaoji granitoids are divisible into 2.2-2.1 Ga (pre-tectonic) monzogranitic gneisses and 1.88-1.85 Ga (post-tectonic) porphyritic monzogranites and alkaline syenites. Combined with cathodoluminescence (CL) imaging, we report LA-ICP-MS (laser ablation inductively coupled plasma mass spectrometry) U-Pb and Hf isotopic data for detrital zircons from the North and South Liaohe Groups. Zircons grains from both groups have igneous zircon cores that yielded two U-Pb age populations at 2.0-2.2 Ga (major) and ∼2.5 Ga (minor), indicating that their provenances were similarly dominated by Paleoproterozoic Liaoji Granitoids and late Archean basement rocks. Some structureless zircon rims in both groups yield concordant or upper intercept ages ∼1.9 Ga, interpreted as the peak metamorphic age of the two groups. These results suggest that both groups were deposited in the period 2.0-1.9 Ga, shortly after the emplacement of the Liaoji Granitoids. Moreover, zircons from both groups have similar Hf model age peaks (T DM C peaks at 2.66-2.75 Ga and 2.80-3.00 Ga) and εHf values (-5 to +9 and -7 to +5). Based on these striking similarities, we propose that the protoliths of the North and South Groups may have formed simultaneously, and that the basement rocks underneath the two groups belong to the same Archean continental block rather than two different blocks as previously considered. The Archean basement underwent Paleoproterozoic rifting, accompanied by the emplacement of the Liaoji granitoids at 2.2-2.1 Ga and the deposition of the North and South Liaohe Groups at 2.1-1.9 Ga, and the rift was subsequently closed by ∼1.9 Ga. © 2008 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151242
ISSN
2015 Impact Factor: 4.037
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLuo, Yen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorLi, Sen_HK
dc.contributor.authorAyers, JCen_HK
dc.contributor.authorXia, Xen_HK
dc.contributor.authorZhang, Jen_HK
dc.date.accessioned2012-06-26T06:19:11Z-
dc.date.available2012-06-26T06:19:11Z-
dc.date.issued2008en_HK
dc.identifier.citationPrecambrian Research, 2008, v. 163 n. 3-4, p. 279-306en_HK
dc.identifier.issn0301-9268en_HK
dc.identifier.urihttp://hdl.handle.net/10722/151242-
dc.description.abstractThe Jiao-Liao-Ji orogenic belt is one of the important Paleoproterozoic mobile belts in the North China Craton (NCC) and its central segment consists of the North and South Liaohe Groups and the Liaoji Granitoids. The North and South Liaohe Groups consist of sedimentary and volcanic successions metamorphosed from greenschist to lower amphibolite facies, and the Liaoji granitoids are divisible into 2.2-2.1 Ga (pre-tectonic) monzogranitic gneisses and 1.88-1.85 Ga (post-tectonic) porphyritic monzogranites and alkaline syenites. Combined with cathodoluminescence (CL) imaging, we report LA-ICP-MS (laser ablation inductively coupled plasma mass spectrometry) U-Pb and Hf isotopic data for detrital zircons from the North and South Liaohe Groups. Zircons grains from both groups have igneous zircon cores that yielded two U-Pb age populations at 2.0-2.2 Ga (major) and ∼2.5 Ga (minor), indicating that their provenances were similarly dominated by Paleoproterozoic Liaoji Granitoids and late Archean basement rocks. Some structureless zircon rims in both groups yield concordant or upper intercept ages ∼1.9 Ga, interpreted as the peak metamorphic age of the two groups. These results suggest that both groups were deposited in the period 2.0-1.9 Ga, shortly after the emplacement of the Liaoji Granitoids. Moreover, zircons from both groups have similar Hf model age peaks (T DM C peaks at 2.66-2.75 Ga and 2.80-3.00 Ga) and εHf values (-5 to +9 and -7 to +5). Based on these striking similarities, we propose that the protoliths of the North and South Groups may have formed simultaneously, and that the basement rocks underneath the two groups belong to the same Archean continental block rather than two different blocks as previously considered. The Archean basement underwent Paleoproterozoic rifting, accompanied by the emplacement of the Liaoji granitoids at 2.2-2.1 Ga and the deposition of the North and South Liaohe Groups at 2.1-1.9 Ga, and the rift was subsequently closed by ∼1.9 Ga. © 2008 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamresen_HK
dc.relation.ispartofPrecambrian Researchen_HK
dc.rightsPrecambrian Research. Copyright © Elsevier BV.-
dc.subjectDetrital zirconen_HK
dc.subjectHf isotopeen_HK
dc.subjectLA-ICP-MSen_HK
dc.subjectLiaohe Groupen_HK
dc.subjectNorth China Cratonen_HK
dc.subjectU-Pb ageen_HK
dc.titleA comparison of U-Pb and Hf isotopic compositions of detrital zircons from the North and South Liaohe Groups: Constraints on the evolution of the Jiao-Liao-Ji Belt, North China Cratonen_HK
dc.typeArticleen_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_fulltexten_US
dc.identifier.doi10.1016/j.precamres.2008.01.002en_HK
dc.identifier.scopuseid_2-s2.0-43149102487en_HK
dc.identifier.hkuros142871-
dc.identifier.volume163en_HK
dc.identifier.issue3-4en_HK
dc.identifier.spage279en_HK
dc.identifier.epage306en_HK
dc.identifier.isiWOS:000256930500005-
dc.publisher.placeNetherlandsen_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.scopusauthoridAyers, JC=7102796988en_HK
dc.identifier.scopusauthoridXia, X=35241486400en_HK
dc.identifier.scopusauthoridZhang, J=9940975100en_HK

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