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Article: Mesozoic, not Paleoproterozoic SHRIMP U-Pb zircon ages of two Liaoji Granites, eastern block, North China craton

TitleMesozoic, not Paleoproterozoic SHRIMP U-Pb zircon ages of two Liaoji Granites, eastern block, North China craton
Authors
Issue Date2004
PublisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGR
Citation
International Geology Review, 2004, v. 46 n. 2, p. 162-176 How to Cite?
AbstractThe Paleoproterozoic Jiao-Liao-Ji orogen in the North China craton is composed mainly of the Liaohe Group (and its equivalents) and the Liaoji Granites. The latter have long been considered to be Paleoproterozoic in age, but have not been precisely constrained by reliable isotopic ages, CL and BSE images reveal the existence of both magmatic and xenocrystal/inherited zircons in one rock sample each from the Dandong and Gaoliduntai granites, two major Liaoji Granite intrusions. The magmatic zircons occur as either single grains or rims surrounding or truncating xenocrystal/inherited zircon cores, and are characterized by euhedral, prismatic grains with well-developed oscillatory zoning, whereas the xenocrystal/inherited zircons occur either as cores surrounded by the igneous zircon rims, or as single grains exhibiting weakly zoned bands. The magmatic zircons yielded ages of 157.4 ± 5.7 Ma and 156.3 ± 4.8 Ma for the Dandong and Gaoliduntai granites, respectively, indicating that these two plutons were emplaced in the Mesozoic, not in the Paleoproterozoic as previously considered. The xenocrystal/inherited zircons in these samples yield ages ranging from 2343 to 1971 Ma, much older than that of the magmatic zircons. Although the precise ages of other Liaoji Granite bodies remain unknown, SHRIMP U-Pb zircon data for one sample of each of the Dandong and Gaoliduntai granites require a re-evaluation of previous tectonic models for evolution of the Paleoproterozoic Jiao-Liao-Ji orogen. © 2004 by V. H. Winston and Son, Inc. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151150
ISSN
2015 Impact Factor: 2.365
2015 SCImago Journal Rankings: 1.248
References

 

DC FieldValueLanguage
dc.contributor.authorLi, Sen_US
dc.contributor.authorZhao, Gen_US
dc.contributor.authorSun, Men_US
dc.contributor.authorFuyuan, Wen_US
dc.contributor.authorLiu, Jen_US
dc.contributor.authorHao, Den_US
dc.contributor.authorHan, Zen_US
dc.contributor.authorLou, Yen_US
dc.date.accessioned2012-06-26T06:17:42Z-
dc.date.available2012-06-26T06:17:42Z-
dc.date.issued2004en_US
dc.identifier.citationInternational Geology Review, 2004, v. 46 n. 2, p. 162-176en_US
dc.identifier.issn0020-6814en_US
dc.identifier.urihttp://hdl.handle.net/10722/151150-
dc.description.abstractThe Paleoproterozoic Jiao-Liao-Ji orogen in the North China craton is composed mainly of the Liaohe Group (and its equivalents) and the Liaoji Granites. The latter have long been considered to be Paleoproterozoic in age, but have not been precisely constrained by reliable isotopic ages, CL and BSE images reveal the existence of both magmatic and xenocrystal/inherited zircons in one rock sample each from the Dandong and Gaoliduntai granites, two major Liaoji Granite intrusions. The magmatic zircons occur as either single grains or rims surrounding or truncating xenocrystal/inherited zircon cores, and are characterized by euhedral, prismatic grains with well-developed oscillatory zoning, whereas the xenocrystal/inherited zircons occur either as cores surrounded by the igneous zircon rims, or as single grains exhibiting weakly zoned bands. The magmatic zircons yielded ages of 157.4 ± 5.7 Ma and 156.3 ± 4.8 Ma for the Dandong and Gaoliduntai granites, respectively, indicating that these two plutons were emplaced in the Mesozoic, not in the Paleoproterozoic as previously considered. The xenocrystal/inherited zircons in these samples yield ages ranging from 2343 to 1971 Ma, much older than that of the magmatic zircons. Although the precise ages of other Liaoji Granite bodies remain unknown, SHRIMP U-Pb zircon data for one sample of each of the Dandong and Gaoliduntai granites require a re-evaluation of previous tectonic models for evolution of the Paleoproterozoic Jiao-Liao-Ji orogen. © 2004 by V. H. Winston and Son, Inc. All rights reserved.en_US
dc.languageengen_US
dc.publisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGRen_US
dc.relation.ispartofInternational Geology Reviewen_US
dc.titleMesozoic, not Paleoproterozoic SHRIMP U-Pb zircon ages of two Liaoji Granites, eastern block, North China cratonen_US
dc.typeArticleen_US
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_US
dc.identifier.emailSun, M:minsun@hku.hken_US
dc.identifier.authorityZhao, G=rp00842en_US
dc.identifier.authoritySun, M=rp00780en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-1842784723en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-1842784723&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume46en_US
dc.identifier.issue2en_US
dc.identifier.spage162en_US
dc.identifier.epage176en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLi, S=8784176300en_US
dc.identifier.scopusauthoridZhao, G=7403296321en_US
dc.identifier.scopusauthoridSun, M=25932315800en_US
dc.identifier.scopusauthoridFuyuan, W=6507434532en_US
dc.identifier.scopusauthoridLiu, J=7410103230en_US
dc.identifier.scopusauthoridHao, D=8620949400en_US
dc.identifier.scopusauthoridHan, Z=8284175100en_US
dc.identifier.scopusauthoridLou, Y=7202582057en_US

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