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Article: The Yanbian Terrane (Southern Sichuan Province, SW China): A Neoproterozoic arc assemblage in the western margin of the Yangtze Block

TitleThe Yanbian Terrane (Southern Sichuan Province, SW China): A Neoproterozoic arc assemblage in the western margin of the Yangtze Block
Authors
KeywordsArc mafic intrusions
China
Neoproterozoic
SHRIMP and Laser ablation ICP-MS zircon dating
Subduction
Yangtze Block
Issue Date2006
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2006, v. 144 n. 1-2, p. 19-38 How to Cite?
AbstractThe magmatic and tectonic history of the Yangtze Block and its possible affinity with other Neoproterozoic arc terranes are important elements in the reconstruction of Neoproterozoic plate tectonics. The Yanbian Terrane in the western margin of the Yangtze Block is a typical arc assemblage composed of a flysch-type sedimentary sequence intruded by gabbroic and granodioritic plutons. The sedimentary sequence consists chiefly of tuffaceous material with interlayered chert, sandstone, and pillow basalts. Laser ablation ICP-MS U-Pb dating of detrital zircons from the sandstones yield ages as young as 840 Ma. The Gaojiacun and Lengshuiqing mafic intrusions are dated at 812 ± 3 Ma and 806 ± 4 Ma, respectively, using the SHRIMP zircon U-Pb technique. Geochemical data show that both the Gaojiacun and Lengshuiqing intrusions have arc signatures, with εNd(t) values of +1.5 to +6.0, initial 87Sr/86Sr ratios of 0.705-0.706 and pronounced negative Nb-Ta and Zr-Hf anomalies. Their geochemical variations are best explained by fractional crystallization without major crustal contamination. The Yanbian Terrane represents a typical arc assemblage formed on the western edge of the Yangtze Block during Neoproterozoic time. The sedimentary sequence was deposited in an oceanic setting, probably in a back arc basin environment. The depleted, subduction-modified lithospheric mantle wedge above the subduction zone was the source of melts from which the mafic plutons were crystallized. This scenario suggests subduction of oceanic lithosphere eastward (present-day orientation) underneath the Yangtze Block. © 2005 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73026
ISSN
2015 Impact Factor: 4.037
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorMa, Yen_HK
dc.contributor.authorYan, DPen_HK
dc.contributor.authorXia, Xen_HK
dc.contributor.authorZhao, JHen_HK
dc.contributor.authorSun, Men_HK
dc.date.accessioned2010-09-06T06:47:21Z-
dc.date.available2010-09-06T06:47:21Z-
dc.date.issued2006en_HK
dc.identifier.citationPrecambrian Research, 2006, v. 144 n. 1-2, p. 19-38en_HK
dc.identifier.issn0301-9268en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73026-
dc.description.abstractThe magmatic and tectonic history of the Yangtze Block and its possible affinity with other Neoproterozoic arc terranes are important elements in the reconstruction of Neoproterozoic plate tectonics. The Yanbian Terrane in the western margin of the Yangtze Block is a typical arc assemblage composed of a flysch-type sedimentary sequence intruded by gabbroic and granodioritic plutons. The sedimentary sequence consists chiefly of tuffaceous material with interlayered chert, sandstone, and pillow basalts. Laser ablation ICP-MS U-Pb dating of detrital zircons from the sandstones yield ages as young as 840 Ma. The Gaojiacun and Lengshuiqing mafic intrusions are dated at 812 ± 3 Ma and 806 ± 4 Ma, respectively, using the SHRIMP zircon U-Pb technique. Geochemical data show that both the Gaojiacun and Lengshuiqing intrusions have arc signatures, with εNd(t) values of +1.5 to +6.0, initial 87Sr/86Sr ratios of 0.705-0.706 and pronounced negative Nb-Ta and Zr-Hf anomalies. Their geochemical variations are best explained by fractional crystallization without major crustal contamination. The Yanbian Terrane represents a typical arc assemblage formed on the western edge of the Yangtze Block during Neoproterozoic time. The sedimentary sequence was deposited in an oceanic setting, probably in a back arc basin environment. The depleted, subduction-modified lithospheric mantle wedge above the subduction zone was the source of melts from which the mafic plutons were crystallized. This scenario suggests subduction of oceanic lithosphere eastward (present-day orientation) underneath the Yangtze Block. © 2005 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamresen_HK
dc.relation.ispartofPrecambrian Researchen_HK
dc.subjectArc mafic intrusionsen_HK
dc.subjectChinaen_HK
dc.subjectNeoproterozoicen_HK
dc.subjectSHRIMP and Laser ablation ICP-MS zircon datingen_HK
dc.subjectSubductionen_HK
dc.subjectYangtze Blocken_HK
dc.titleThe Yanbian Terrane (Southern Sichuan Province, SW China): A Neoproterozoic arc assemblage in the western margin of the Yangtze Blocken_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0301-9268&volume=144&issue=1-2&spage=19&epage=38&date=2006&atitle=The+Yanbian+Terrane+(Southern+Sichuan+Province,+SW+China):+A+Neoproterozoic+arc+assemblage+in+the+western+margin+of+the+Yangtze+Blocken_HK
dc.identifier.emailZhou, MF: mfzhou@hkucc.hku.hken_HK
dc.identifier.emailXia, X: xpxia@hotmail.comen_HK
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.identifier.authorityXia, X=rp00815en_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.precamres.2005.11.002en_HK
dc.identifier.scopuseid_2-s2.0-30344470453en_HK
dc.identifier.hkuros109733en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-30344470453&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume144en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage19en_HK
dc.identifier.epage38en_HK
dc.identifier.isiWOS:000234934200002-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridMa, Y=7404700051en_HK
dc.identifier.scopusauthoridYan, DP=36683417500en_HK
dc.identifier.scopusauthoridXia, X=35241486400en_HK
dc.identifier.scopusauthoridZhao, JH=49061691300en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK

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