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Article: 40Ar/39Ar constraints on a temporal link between gold mineralization, magmatism, and continental margin transtension in the Jiaodong Gold Province, eastern China
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Title40Ar/39Ar constraints on a temporal link between gold mineralization, magmatism, and continental margin transtension in the Jiaodong Gold Province, eastern China
 
AuthorsLi, JW1
Vasconcelos, PM1
Zhang, J1
Zhou, MF1
Zhang, XJ1
Yang, FH1
 
KeywordsEarth sciences
Geology
 
Issue Date2003
 
PublisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/JG
 
CitationJournal Of Geology, 2003, v. 111 n. 6, p. 741-751 [How to Cite?]
DOI: http://dx.doi.org/10.1086/378486
 
AbstractThe Jiaodong gold province is the largest gold repository in China. Both mineralization and granitoid hosts are spatially related to the crustal-scale Tan-Lu strike-slip fault system, which developed along the Mesozoic continental margin in eastern China. A series of 40Ar/39Ar laser incremental heating analyses of hydrothermal sericite/muscovite from three major gold deposits (Jiaojia, Xincheng, and Wangershan) and igneous biotite from the granodiorite hosts were performed to establish a possible temporal link between gold mineralization, magmatism, and movement along the Tan-Lu fault zone. Magmatic biotite crystals yield well-defined and concordant plateau ages between 124.5 ± 0.4 Ma and 124.0 ± 0.4 Ma (2σ), whereas sericite and muscovite samples (a total of 30 single separates) give reproducible plateau ages ranging from 121.0 ± 0.4 Ma to 119.2 ± 0.2 Ma (2σ). An integration of our 40Ar/39Ar results with age data from other major gold deposits in Jiaodong demonstrates that widespread gold mineralization occurred contemporaneously during a 2-3-m.yr. period. Most gold deposits show intimate spatial associations with abundant mafic to intermediate dikes. The mafic dikes have K-Ar ages of 123.5-119.6 Ma, in excellent agreement with those of the gold deposits. These newly obtained 40Ar/39Ar ages, in combination with other independent geological and geochronological data on granodioritic intrusions (130-126 Ma), volcanic rocks (1243.6-114.7 Ma), and deformed rocks within strike-slip faults (132-120 Ma) in Jiaodong or adjacent areas, also support the idea that gold mineralization postdated the granodioritic magmatism but was contemporaneous with mafic magmatism and volcanism, all controlled by the transtensional motion along the Tan-Lu fault in the Early Cretaceous.
 
ISSN0022-1376
2012 Impact Factor: 2.692
2012 SCImago Journal Rankings: 1.263
 
DOIhttp://dx.doi.org/10.1086/378486
 
ISI Accession Number IDWOS:000187623600009
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorLi, JW
 
dc.contributor.authorVasconcelos, PM
 
dc.contributor.authorZhang, J
 
dc.contributor.authorZhou, MF
 
dc.contributor.authorZhang, XJ
 
dc.contributor.authorYang, FH
 
dc.date.accessioned2007-10-30T06:07:47Z
 
dc.date.available2007-10-30T06:07:47Z
 
dc.date.issued2003
 
dc.description.abstractThe Jiaodong gold province is the largest gold repository in China. Both mineralization and granitoid hosts are spatially related to the crustal-scale Tan-Lu strike-slip fault system, which developed along the Mesozoic continental margin in eastern China. A series of 40Ar/39Ar laser incremental heating analyses of hydrothermal sericite/muscovite from three major gold deposits (Jiaojia, Xincheng, and Wangershan) and igneous biotite from the granodiorite hosts were performed to establish a possible temporal link between gold mineralization, magmatism, and movement along the Tan-Lu fault zone. Magmatic biotite crystals yield well-defined and concordant plateau ages between 124.5 ± 0.4 Ma and 124.0 ± 0.4 Ma (2σ), whereas sericite and muscovite samples (a total of 30 single separates) give reproducible plateau ages ranging from 121.0 ± 0.4 Ma to 119.2 ± 0.2 Ma (2σ). An integration of our 40Ar/39Ar results with age data from other major gold deposits in Jiaodong demonstrates that widespread gold mineralization occurred contemporaneously during a 2-3-m.yr. period. Most gold deposits show intimate spatial associations with abundant mafic to intermediate dikes. The mafic dikes have K-Ar ages of 123.5-119.6 Ma, in excellent agreement with those of the gold deposits. These newly obtained 40Ar/39Ar ages, in combination with other independent geological and geochronological data on granodioritic intrusions (130-126 Ma), volcanic rocks (1243.6-114.7 Ma), and deformed rocks within strike-slip faults (132-120 Ma) in Jiaodong or adjacent areas, also support the idea that gold mineralization postdated the granodioritic magmatism but was contemporaneous with mafic magmatism and volcanism, all controlled by the transtensional motion along the Tan-Lu fault in the Early Cretaceous.
 
dc.description.naturepublished_or_final_version
 
dc.format.extent671843 bytes
 
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dc.identifier.citationJournal Of Geology, 2003, v. 111 n. 6, p. 741-751 [How to Cite?]
DOI: http://dx.doi.org/10.1086/378486
 
dc.identifier.doihttp://dx.doi.org/10.1086/378486
 
dc.identifier.epage751
 
dc.identifier.hkuros91733
 
dc.identifier.isiWOS:000187623600009
 
dc.identifier.issn0022-1376
2012 Impact Factor: 2.692
2012 SCImago Journal Rankings: 1.263
 
dc.identifier.issue6
 
dc.identifier.openurl
 
dc.identifier.scopuseid_2-s2.0-1242299769
 
dc.identifier.spage741
 
dc.identifier.urihttp://hdl.handle.net/10722/44688
 
dc.identifier.volume111
 
dc.languageeng
 
dc.publisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/JG
 
dc.publisher.placeUnited States
 
dc.relation.ispartofJournal of Geology
 
dc.relation.referencesReferences in Scopus
 
dc.rightsThe Journal of Geology. Copyright © University of Chicago Press.
 
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License
 
dc.subjectEarth sciences
 
dc.subjectGeology
 
dc.title40Ar/39Ar constraints on a temporal link between gold mineralization, magmatism, and continental margin transtension in the Jiaodong Gold Province, eastern China
 
dc.typeArticle
 
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Author Affiliations
  1. China University of Geosciences