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Article: The earlier spreading of South China Sea Basin due to the Late Mesozoic to Early Cenozoic extension of South China block: Structural styles and chronological evidence from the Dulong-Song Chay metamorphic Dome, Southwest China

TitleThe earlier spreading of South China Sea Basin due to the Late Mesozoic to Early Cenozoic extension of South China block: Structural styles and chronological evidence from the Dulong-Song Chay metamorphic Dome, Southwest China
Authors
KeywordsDulong-Song Chay Metamorphic Dome
Extensional Tectonics
Geochronological Determination
South China Block
South China Sea Basin
Issue Date2005
PublisherZhongguo Dizhi Daxue. The Journal's web site is located at http://dqkx-e.periodicals.net.cn
Citation
Journal Of China University Of Geosciences (now Journal of Earth Science 地球科學學刊(英文版)), 2005, v. 16 n. 3, p. 189-199 How to Cite?
AbstractTo understand the forming and tectonic evolution of the South China Sea basin, new data of the structural styles and geochronology were obtained from the Dulong-Song Chay dome, southeastern Yunnan and northern Vietnam. The structural styles were acquired through field investigation and geochronological dating was carried out using zircon SHRIMP II U-P and argon isotopic analyses. The South China Sea basin extension occurred firstly at Late Mesozoic to Early Cenozoic, and then at Late Oligocene to Middle Miocene (32-17 Ma). The second stage of extension formed immediately after the first stage, and both extensions have a consistent forming mechanism. New structural analysis and geochronological data do not support the models of "backarc spreading" and "strike-slip faults producing the extension". Then what mechanism resulted in the extension of South China Sea basin? The data indicate that at least two episodes of major extensional tectonics, i. e., the D, deformation at 237-228 Ma resulted in the rising and exhumation of the dome, and D 2 deformation at 86-78 Ma overprinted and redeformed the dome. Of them, the D 2 shows a consistent forming time, extensional direction and tectonic regime among Dulong-Song Chay dome, South China block and the northern margin of the South China Sea basin. Regional geology has proved that the northern margin of the South China Sea basin belongs to the South China block, therefore, we interpreted that the Late Mesozoic to Early Cenozoic extensional tectonics occurred in the northern margin of the South China Sea basin due to the intraplate deformation of the South China block. while the Ailaoshan-Red River sinistral slip strengthened the Cenozoic extension in the South China Sea basin.
Persistent Identifierhttp://hdl.handle.net/10722/151170
ISSN
2010 Impact Factor: 0.703
2011 SCImago Journal Rankings: 0.433
References

 

DC FieldValueLanguage
dc.contributor.authorYan, Den_US
dc.contributor.authorZhou, Men_US
dc.contributor.authorWang, Yen_US
dc.contributor.authorZhao, Ten_US
dc.date.accessioned2012-06-26T06:18:02Z-
dc.date.available2012-06-26T06:18:02Z-
dc.date.issued2005en_US
dc.identifier.citationJournal Of China University Of Geosciences (now Journal of Earth Science 地球科學學刊(英文版)), 2005, v. 16 n. 3, p. 189-199en_US
dc.identifier.issn1002-0705en_US
dc.identifier.urihttp://hdl.handle.net/10722/151170-
dc.description.abstractTo understand the forming and tectonic evolution of the South China Sea basin, new data of the structural styles and geochronology were obtained from the Dulong-Song Chay dome, southeastern Yunnan and northern Vietnam. The structural styles were acquired through field investigation and geochronological dating was carried out using zircon SHRIMP II U-P and argon isotopic analyses. The South China Sea basin extension occurred firstly at Late Mesozoic to Early Cenozoic, and then at Late Oligocene to Middle Miocene (32-17 Ma). The second stage of extension formed immediately after the first stage, and both extensions have a consistent forming mechanism. New structural analysis and geochronological data do not support the models of "backarc spreading" and "strike-slip faults producing the extension". Then what mechanism resulted in the extension of South China Sea basin? The data indicate that at least two episodes of major extensional tectonics, i. e., the D, deformation at 237-228 Ma resulted in the rising and exhumation of the dome, and D 2 deformation at 86-78 Ma overprinted and redeformed the dome. Of them, the D 2 shows a consistent forming time, extensional direction and tectonic regime among Dulong-Song Chay dome, South China block and the northern margin of the South China Sea basin. Regional geology has proved that the northern margin of the South China Sea basin belongs to the South China block, therefore, we interpreted that the Late Mesozoic to Early Cenozoic extensional tectonics occurred in the northern margin of the South China Sea basin due to the intraplate deformation of the South China block. while the Ailaoshan-Red River sinistral slip strengthened the Cenozoic extension in the South China Sea basin.en_US
dc.languageengen_US
dc.publisherZhongguo Dizhi Daxue. The Journal's web site is located at http://dqkx-e.periodicals.net.cnen_US
dc.relation.ispartofJournal of China University of Geosciencesen_US
dc.relation.ispartof中國地質大學學報(英文版)-
dc.relation.ispartofJournal of Earth Science-
dc.relation.ispartof地球科學學刊(英文版)-
dc.subjectDulong-Song Chay Metamorphic Domeen_US
dc.subjectExtensional Tectonicsen_US
dc.subjectGeochronological Determinationen_US
dc.subjectSouth China Blocken_US
dc.subjectSouth China Sea Basinen_US
dc.titleThe earlier spreading of South China Sea Basin due to the Late Mesozoic to Early Cenozoic extension of South China block: Structural styles and chronological evidence from the Dulong-Song Chay metamorphic Dome, Southwest Chinaen_US
dc.typeArticleen_US
dc.identifier.emailZhou, M: mfzhou@hkucc.hku.hken_US
dc.identifier.authorityZhou, M=rp00844en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-27844447181en_US
dc.identifier.hkuros108816-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-27844447181&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume16en_US
dc.identifier.issue3en_US
dc.identifier.spage189en_US
dc.identifier.epage199en_US
dc.publisher.placeChinaen_US
dc.identifier.scopusauthoridYan, D=36683417500en_US
dc.identifier.scopusauthoridZhou, M=7403506005en_US
dc.identifier.scopusauthoridWang, Y=7601516613en_US
dc.identifier.scopusauthoridZhao, T=7402268400en_US

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