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Article: SHRIMP U-Pb zircon geochronology of the Fuping Complex: Implications for formation and assembly of the North China Craton

TitleSHRIMP U-Pb zircon geochronology of the Fuping Complex: Implications for formation and assembly of the North China Craton
Authors
KeywordsGneisses
North China Craton
SHRIMP
U-Pb Geochronology
Issue Date2002
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2002, v. 113 n. 1-2, p. 1-18 How to Cite?
AbstractThe Fuping Complex, located within the central zone of the North China Craton, is composed of amphibolite to granulite facies orthogneisses, interleaved with minor supracrustal rocks at similar metamorphic grade. The oldest components recognised are hornblende gneiss enclaves within the predominant biotite orthogneiss which have a SHRIMP U-Pb zircon age of 2708 ± 8 Ma. We consider these enclaves to represent fragments of ∼ 2.7 Ga continental materials incorporated in the biotite gneiss. The biotite gneiss has a SHRIMP U-Pb zircon age of 2513 ± 12 Ma, interpreted to be time of magmatic crystallisation of the igneous precursor, based on the igneous characteristics of the zircons. This indicates a major magmatic episode at 2.52 Ga in the Fuping Complex, identical to the age of felsic volcanism within the low-grade Wutai Complex which crops out immediately to the west. A gneissic granite that intrudes the biotite gneisses has a poorly-defined 207Pb/ 206Pb age of 2045 ± 64 Ma. This is within error of the age of 2097 ± 46 Ma obtained from a fine-grained gneiss interlayered with amphibolite of the Wanzi Supracrustal Suite (WSS), interpreted to be volcanic in origin. Zircons from both these samples have strong oscillatory zoning and provide the first indication of a Palaeoproterozoic magmatic event in the area, again similar in age to magmatic events recently recognised in the adjacent Wutai Complex. These data indicate a comparable history for the Fuping and Wutai Complexes and support geochemical evidence that they had a common origin and formed part of a Late Archaean arc, affected by later Palaeoproterozoic re-activation. Low-uranium zircons without oscillatory zoning, separated from a sample of biotite gneiss, yield data clustered at 1817 ± 26 Ma, which is interpreted to reflect a period of new zircon growth during a major metamorphic event. These data support the recently-proposed tectonic model that amalgamation of the North China Craton occurred due to collision of the Eastern and Western Blocks along the central zone at ∼ 1.8 Ga ago. © 2002 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73073
ISSN
2015 Impact Factor: 4.037
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorGuan, Hen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorWilde, SAen_HK
dc.contributor.authorZhou, Xen_HK
dc.contributor.authorZhai, Men_HK
dc.date.accessioned2010-09-06T06:47:47Z-
dc.date.available2010-09-06T06:47:47Z-
dc.date.issued2002en_HK
dc.identifier.citationPrecambrian Research, 2002, v. 113 n. 1-2, p. 1-18en_HK
dc.identifier.issn0301-9268en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73073-
dc.description.abstractThe Fuping Complex, located within the central zone of the North China Craton, is composed of amphibolite to granulite facies orthogneisses, interleaved with minor supracrustal rocks at similar metamorphic grade. The oldest components recognised are hornblende gneiss enclaves within the predominant biotite orthogneiss which have a SHRIMP U-Pb zircon age of 2708 ± 8 Ma. We consider these enclaves to represent fragments of ∼ 2.7 Ga continental materials incorporated in the biotite gneiss. The biotite gneiss has a SHRIMP U-Pb zircon age of 2513 ± 12 Ma, interpreted to be time of magmatic crystallisation of the igneous precursor, based on the igneous characteristics of the zircons. This indicates a major magmatic episode at 2.52 Ga in the Fuping Complex, identical to the age of felsic volcanism within the low-grade Wutai Complex which crops out immediately to the west. A gneissic granite that intrudes the biotite gneisses has a poorly-defined 207Pb/ 206Pb age of 2045 ± 64 Ma. This is within error of the age of 2097 ± 46 Ma obtained from a fine-grained gneiss interlayered with amphibolite of the Wanzi Supracrustal Suite (WSS), interpreted to be volcanic in origin. Zircons from both these samples have strong oscillatory zoning and provide the first indication of a Palaeoproterozoic magmatic event in the area, again similar in age to magmatic events recently recognised in the adjacent Wutai Complex. These data indicate a comparable history for the Fuping and Wutai Complexes and support geochemical evidence that they had a common origin and formed part of a Late Archaean arc, affected by later Palaeoproterozoic re-activation. Low-uranium zircons without oscillatory zoning, separated from a sample of biotite gneiss, yield data clustered at 1817 ± 26 Ma, which is interpreted to reflect a period of new zircon growth during a major metamorphic event. These data support the recently-proposed tectonic model that amalgamation of the North China Craton occurred due to collision of the Eastern and Western Blocks along the central zone at ∼ 1.8 Ga ago. © 2002 Elsevier Science 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.rightsPrecambrian Research. Copyright © Elsevier BV.en_HK
dc.subjectGneissesen_HK
dc.subjectNorth China Cratonen_HK
dc.subjectSHRIMPen_HK
dc.subjectU-Pb Geochronologyen_HK
dc.titleSHRIMP U-Pb zircon geochronology of the Fuping Complex: Implications for formation and assembly of the North China Cratonen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0301-9268&volume=113&spage=1&epage=18&date=2002&atitle=SHRIMP+U-Pb+zircon+geochronology+of+the+Fuping+Complex:+implications+for+formation+and+assembly+of+the+North+China+Craton+en_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0301-9268(01)00197-8en_HK
dc.identifier.scopuseid_2-s2.0-0037006102en_HK
dc.identifier.hkuros72227en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037006102&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume113en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage1en_HK
dc.identifier.epage18en_HK
dc.identifier.isiWOS:000172960500001-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridGuan, H=36901914400en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridWilde, SA=35254758600en_HK
dc.identifier.scopusauthoridZhou, X=48961487000en_HK
dc.identifier.scopusauthoridZhai, M=7007119530en_HK

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