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Article: A Palaeoarchean–Mesoarchean micro-continent entrained in the Jiao-Liao-Ji Belt at the southeastern North China Craton: evidence from the zircon record in the Bengbu area

TitleA Palaeoarchean–Mesoarchean micro-continent entrained in the Jiao-Liao-Ji Belt at the southeastern North China Craton: evidence from the zircon record in the Bengbu area
Authors
KeywordsBengbu area
Jiao-Liao-Ji Belt
North China Craton
Palaeoarchean-Palaeoproterozoic
zirconology
Issue Date2019
PublisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=GEO
Citation
Geological Magazine, 2019, v. 156 n. 9, p. 1565-1586 How to Cite?
AbstractThe Bengbu area in the southeastern North China Craton (NCC) consists predominantly of Archean-Palaeoproterozoic (gneissic) granitoids with minor supracrustal rocks (the Fengyang and Wuhe groups). This study presents new zircon laser ablation-inductively coupled plasma-mass spectrometry U-Pb and Lu-Hf isotopic data and trace-element contents for these granitoids, which improve understanding the Archean-Palaeoproterozoic crustal evolution of the NCC. Magmatic zircon U-Pb data reveal that zircons in the (gneissic) granitoids were generated by multi-stage events at 2.93, 2.73, 2.53-2.52 and 2.18-2.13Â Ga. Metamorphic zircon U-Pb data obtained from these rocks show two distinct metamorphic ages of 2.49-2.52 and 1.84Â Ga, suggesting that the Bengbu area experienced a regional metamorphic event at the end of the Neoarchean Era and encountered reworking by a tectonothermal event associated with the formation of the Palaeoproterozoic Jiao-Liao-Ji Belt. Trace-element compositions of magmatic zircons reveal the highest Ti concentrations (8.08±3.38Â ppm) and growth temperatures (718±44Â °C) for the zircons aged 2.13-2.17Â Ga and an increase in zircon U/Yb ratios from 2.93Â Ga (0.34±0.12) through 2.73Â Ga (0.96±0.42) to 2.53Â Ga (1.05±0.46), but an evident decrease at 2.17-2.13 Ga (0.61±0.40 ppm). Similar Palaeoarchean xenocrystic and detrital zircons with negative É Hf(t) values, late Mesoarchean magmatic zircons with juvenile Hf isotopic features, early Neoarchean magmatic zircons with model ages of 2.9-3.0Â Ga, and two regional metamorphic events at 2.52-2.48 and 1.88-1.80Â Ga in the Bengbu and Jiaobei areas indicate a Palaeoarchean-Mesoarchean micro-continent entrained in the Jiao-Liao-Ji Belt at the southeastern NCC. © Cambridge University Press 2019.
Persistent Identifierhttp://hdl.handle.net/10722/274958
ISSN
2023 Impact Factor: 2.0
2023 SCImago Journal Rankings: 0.851
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, CH-
dc.contributor.authorZhao, G-
dc.contributor.authorLiu, FL-
dc.contributor.authorCai, J-
dc.date.accessioned2019-09-10T02:32:26Z-
dc.date.available2019-09-10T02:32:26Z-
dc.date.issued2019-
dc.identifier.citationGeological Magazine, 2019, v. 156 n. 9, p. 1565-1586-
dc.identifier.issn0016-7568-
dc.identifier.urihttp://hdl.handle.net/10722/274958-
dc.description.abstractThe Bengbu area in the southeastern North China Craton (NCC) consists predominantly of Archean-Palaeoproterozoic (gneissic) granitoids with minor supracrustal rocks (the Fengyang and Wuhe groups). This study presents new zircon laser ablation-inductively coupled plasma-mass spectrometry U-Pb and Lu-Hf isotopic data and trace-element contents for these granitoids, which improve understanding the Archean-Palaeoproterozoic crustal evolution of the NCC. Magmatic zircon U-Pb data reveal that zircons in the (gneissic) granitoids were generated by multi-stage events at 2.93, 2.73, 2.53-2.52 and 2.18-2.13Â Ga. Metamorphic zircon U-Pb data obtained from these rocks show two distinct metamorphic ages of 2.49-2.52 and 1.84Â Ga, suggesting that the Bengbu area experienced a regional metamorphic event at the end of the Neoarchean Era and encountered reworking by a tectonothermal event associated with the formation of the Palaeoproterozoic Jiao-Liao-Ji Belt. Trace-element compositions of magmatic zircons reveal the highest Ti concentrations (8.08±3.38Â ppm) and growth temperatures (718±44Â °C) for the zircons aged 2.13-2.17Â Ga and an increase in zircon U/Yb ratios from 2.93Â Ga (0.34±0.12) through 2.73Â Ga (0.96±0.42) to 2.53Â Ga (1.05±0.46), but an evident decrease at 2.17-2.13 Ga (0.61±0.40 ppm). Similar Palaeoarchean xenocrystic and detrital zircons with negative É Hf(t) values, late Mesoarchean magmatic zircons with juvenile Hf isotopic features, early Neoarchean magmatic zircons with model ages of 2.9-3.0Â Ga, and two regional metamorphic events at 2.52-2.48 and 1.88-1.80Â Ga in the Bengbu and Jiaobei areas indicate a Palaeoarchean-Mesoarchean micro-continent entrained in the Jiao-Liao-Ji Belt at the southeastern NCC. © Cambridge University Press 2019.-
dc.languageeng-
dc.publisherCambridge University Press. The Journal's web site is located at http://journals.cambridge.org/action/displayJournal?jid=GEO-
dc.relation.ispartofGeological Magazine-
dc.rightsGeological Magazine. Copyright © Cambridge University Press.-
dc.rightsThis article has been published in a revised form in [Journal] [http://doi.org/XXX]. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © copyright holder.-
dc.subjectBengbu area-
dc.subjectJiao-Liao-Ji Belt-
dc.subjectNorth China Craton-
dc.subjectPalaeoarchean-Palaeoproterozoic-
dc.subjectzirconology-
dc.titleA Palaeoarchean–Mesoarchean micro-continent entrained in the Jiao-Liao-Ji Belt at the southeastern North China Craton: evidence from the zircon record in the Bengbu area-
dc.typeArticle-
dc.identifier.emailZhao, G: gzhao@hku.hk-
dc.identifier.authorityZhao, G=rp00842-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1017/S0016756818000869-
dc.identifier.scopuseid_2-s2.0-85063157459-
dc.identifier.hkuros302984-
dc.identifier.volume156-
dc.identifier.issue9-
dc.identifier.spage1565-
dc.identifier.epage1586-
dc.identifier.isiWOS:000478894700005-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl0016-7568-

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