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Article: SHRIMP U-Pb zircon geochronological and geochemical evidence for Neoproterozoic arc-magmatism along the western margin of the Yangtze Block, South China

TitleSHRIMP U-Pb zircon geochronological and geochemical evidence for Neoproterozoic arc-magmatism along the western margin of the Yangtze Block, South China
Authors
KeywordsGeochronology
Granite
Metamorphic Belts
Neoproterozoic
Rodinia
Shrimp Data
South China Block
Subduction
Issue Date2002
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl
Citation
Earth And Planetary Science Letters, 2002, v. 196 n. 1-2, p. 51-67 How to Cite?
AbstractThe magmatic and tectonic history of the Yangtze Block and its possible affinity with other Neoproterozoic arc terranes are important in the reconstruction of Neoproterozoic plate tectonics. In the Panxi Belt, adjacent to the eastern margin of the Tibetan Plateau, there are many metamorphic complexes associated with Neoproterozoic granites. These are granitic gneisses of upper greenschist to amphibolite metamorphic facies, which have traditionally been considered the Archean basement of the Yangtze Block, although their origin and age of formation were poorly understood. This study provides the first reliable, SHRIMP U-Pb zircon dating results for the gneissic complexes and the Neoproterozoic granites. Three samples of the Kangding gneissic complex yielded identical ages of 797±10, 795±13 and 796±14 Ma. The Gongcai gneissic complex has zircons dated to be 824±14 Ma with metamorphic rims of 177±3 Ma, whereas the Gezong granite has an older age of 864±8 Ma. Other gneissic complexes include the Miyi complex that has a younger age of 764±9 Ma. Geochemical data show that the Kangding gneissic complex has arc signatures, representing metamorphic products of Neoproterozoic, are-related acidic plutons. This scenario suggests subduction of oceanic lithoshere eastward (present-day orientation) underneath the Yangtze Block. There is a well-defined arc assemblage with an identical Neoproterozoic age along the eastern margin of the Yangtze Block. Thus, during Neoproterozoic time, both the western and eastern margins of the block were active arcs separated by the Trans-Yangtze basin. The Yangtze Block must, therefore, have been an isolated continent, although it was presumably located near the Rodinian supercontinent. ©2002 Elsevier Science B.V. All right reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151081
ISSN
2015 Impact Factor: 4.326
2015 SCImago Journal Rankings: 3.628
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, MFen_US
dc.contributor.authorYan, DPen_US
dc.contributor.authorKennedy, AKen_US
dc.contributor.authorLi, Yen_US
dc.contributor.authorDing, Jen_US
dc.date.accessioned2012-06-26T06:16:52Z-
dc.date.available2012-06-26T06:16:52Z-
dc.date.issued2002en_US
dc.identifier.citationEarth And Planetary Science Letters, 2002, v. 196 n. 1-2, p. 51-67en_US
dc.identifier.issn0012-821Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/151081-
dc.description.abstractThe magmatic and tectonic history of the Yangtze Block and its possible affinity with other Neoproterozoic arc terranes are important in the reconstruction of Neoproterozoic plate tectonics. In the Panxi Belt, adjacent to the eastern margin of the Tibetan Plateau, there are many metamorphic complexes associated with Neoproterozoic granites. These are granitic gneisses of upper greenschist to amphibolite metamorphic facies, which have traditionally been considered the Archean basement of the Yangtze Block, although their origin and age of formation were poorly understood. This study provides the first reliable, SHRIMP U-Pb zircon dating results for the gneissic complexes and the Neoproterozoic granites. Three samples of the Kangding gneissic complex yielded identical ages of 797±10, 795±13 and 796±14 Ma. The Gongcai gneissic complex has zircons dated to be 824±14 Ma with metamorphic rims of 177±3 Ma, whereas the Gezong granite has an older age of 864±8 Ma. Other gneissic complexes include the Miyi complex that has a younger age of 764±9 Ma. Geochemical data show that the Kangding gneissic complex has arc signatures, representing metamorphic products of Neoproterozoic, are-related acidic plutons. This scenario suggests subduction of oceanic lithoshere eastward (present-day orientation) underneath the Yangtze Block. There is a well-defined arc assemblage with an identical Neoproterozoic age along the eastern margin of the Yangtze Block. Thus, during Neoproterozoic time, both the western and eastern margins of the block were active arcs separated by the Trans-Yangtze basin. The Yangtze Block must, therefore, have been an isolated continent, although it was presumably located near the Rodinian supercontinent. ©2002 Elsevier Science B.V. All right reserved.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epslen_US
dc.relation.ispartofEarth and Planetary Science Lettersen_US
dc.rightsEarth and Planetary Science Letters. Copyright © Elsevier BV.-
dc.subjectGeochronologyen_US
dc.subjectGraniteen_US
dc.subjectMetamorphic Beltsen_US
dc.subjectNeoproterozoicen_US
dc.subjectRodiniaen_US
dc.subjectShrimp Dataen_US
dc.subjectSouth China Blocken_US
dc.subjectSubductionen_US
dc.titleSHRIMP U-Pb zircon geochronological and geochemical evidence for Neoproterozoic arc-magmatism along the western margin of the Yangtze Block, South Chinaen_US
dc.typeArticleen_US
dc.identifier.emailZhou, MF: mfzhou@hkucc.hku.hken_US
dc.identifier.authorityZhou, MF=rp00844en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0012-821X(01)00595-7en_US
dc.identifier.scopuseid_2-s2.0-0036222373en_US
dc.identifier.hkuros71239-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036222373&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume196en_US
dc.identifier.issue1-2en_US
dc.identifier.spage51en_US
dc.identifier.epage67en_US
dc.identifier.isiWOS:000174697100004-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridZhou, MF=7403506005en_US
dc.identifier.scopusauthoridYan, DP=36683417500en_US
dc.identifier.scopusauthoridKennedy, AK=7401653640en_US
dc.identifier.scopusauthoridLi, Y=49161111000en_US
dc.identifier.scopusauthoridDing, J=49160910100en_US
dc.customcontrol.immutablesml 130308-

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