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Article: Differentiating continental and oceanic arc systems and retro-arc basins in the Jiangnan orogenic belt, South China

TitleDifferentiating continental and oceanic arc systems and retro-arc basins in the Jiangnan orogenic belt, South China
Authors
Keywordscontinental arc
detrital zircons
isotopes and whole-rock geochemistry
Jiangnan orogenic belt
oceanic arc
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, Epub How to Cite?
AbstractThe Neoproterozoic Jiangnan orogenic belt records the accretion and collision between the Yangtze and Cathaysia blocks in South China. The orogen is divisible into three units: a northeastern domain (also referred to as the Huaiyu or Shuangxiwu domain), a central domain (Jiuling domain) and an undifferentiated southwestern domain. Detrital zircons from the oldest sequences (Shuangqiaoshan, Lengjiaxi, Fanjingshan and Sibao groups) in the central and southwest domains yield similar age spectra with major age populations at c. 875-820 Ma, along with minor Palaeo- to Mesoproterozoic and Archaean ages. The dominance of detrital ages close to the deposition ages of the units, along with juvenile zircon Hf isotopic compositions and arc-like whole-rock compositional data, indicate the sedimentary units accumulated adjacent to a convergent plate margin magmatic arc. The presence of Mesoproterozoic and older zircons, both as detritus in the units and as xenocrysts within igneous rocks displaying a subduction-related signature, along with the compositional data, place the magmatic arc along a continental margin. In the northeastern domain, the oldest coeval sequence (Shuangxiwu and Qigong groups) and arc igneous suites are dated at c. 970-850 Ma, and lack older detritus and xenocrysts, indicating they represent an accreted oceanic arc system. © Cambridge University Press 2019.
Persistent Identifierhttp://hdl.handle.net/10722/274962
ISSN
2019 Impact Factor: 2.365
2015 SCImago Journal Rankings: 1.119

 

DC FieldValueLanguage
dc.contributor.authorYao, J-
dc.contributor.authorShu, L-
dc.contributor.authorCawood, PA-
dc.contributor.authorZhao, G-
dc.date.accessioned2019-09-10T02:32:30Z-
dc.date.available2019-09-10T02:32:30Z-
dc.date.issued2019-
dc.identifier.citationGeological Magazine, 2019, Epub-
dc.identifier.issn0016-7568-
dc.identifier.urihttp://hdl.handle.net/10722/274962-
dc.description.abstractThe Neoproterozoic Jiangnan orogenic belt records the accretion and collision between the Yangtze and Cathaysia blocks in South China. The orogen is divisible into three units: a northeastern domain (also referred to as the Huaiyu or Shuangxiwu domain), a central domain (Jiuling domain) and an undifferentiated southwestern domain. Detrital zircons from the oldest sequences (Shuangqiaoshan, Lengjiaxi, Fanjingshan and Sibao groups) in the central and southwest domains yield similar age spectra with major age populations at c. 875-820 Ma, along with minor Palaeo- to Mesoproterozoic and Archaean ages. The dominance of detrital ages close to the deposition ages of the units, along with juvenile zircon Hf isotopic compositions and arc-like whole-rock compositional data, indicate the sedimentary units accumulated adjacent to a convergent plate margin magmatic arc. The presence of Mesoproterozoic and older zircons, both as detritus in the units and as xenocrysts within igneous rocks displaying a subduction-related signature, along with the compositional data, place the magmatic arc along a continental margin. In the northeastern domain, the oldest coeval sequence (Shuangxiwu and Qigong groups) and arc igneous suites are dated at c. 970-850 Ma, and lack older detritus and xenocrysts, indicating they represent an accreted oceanic arc system. © 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.subjectcontinental arc-
dc.subjectdetrital zircons-
dc.subjectisotopes and whole-rock geochemistry-
dc.subjectJiangnan orogenic belt-
dc.subjectoceanic arc-
dc.titleDifferentiating continental and oceanic arc systems and retro-arc basins in the Jiangnan orogenic belt, South China-
dc.typeArticle-
dc.identifier.emailZhao, G: gzhao@hku.hk-
dc.identifier.authorityZhao, G=rp00842-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1017/S001675681900027X-
dc.identifier.scopuseid_2-s2.0-85065843441-
dc.identifier.hkuros302990-
dc.publisher.placeUnited Kingdom-

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