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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

Title40Ar/39Ar constraints on a temporal link between gold mineralization, magmatism, and continental margin transtension in the Jiaodong Gold Province, eastern China
Authors
KeywordsEarth sciences
Geology
Issue Date2003
PublisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/JG
Citation
Journal Of Geology, 2003, v. 111 n. 6, p. 741-751 How to Cite?
Abstract
The 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.
Persistent Identifierhttp://hdl.handle.net/10722/44688
ISSN
2013 Impact Factor: 2.436
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, JWen_HK
dc.contributor.authorVasconcelos, PMen_HK
dc.contributor.authorZhang, Jen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorZhang, XJen_HK
dc.contributor.authorYang, FHen_HK
dc.date.accessioned2007-10-30T06:07:47Z-
dc.date.available2007-10-30T06:07:47Z-
dc.date.issued2003en_HK
dc.identifier.citationJournal Of Geology, 2003, v. 111 n. 6, p. 741-751en_HK
dc.identifier.issn0022-1376en_HK
dc.identifier.urihttp://hdl.handle.net/10722/44688-
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.en_HK
dc.format.extent671843 bytes-
dc.format.extent2822 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/JGen_HK
dc.relation.ispartofJournal of Geologyen_HK
dc.rightsThe Journal of Geology. Copyright © University of Chicago Press.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectEarth sciencesen_HK
dc.subjectGeologyen_HK
dc.title40Ar/39Ar constraints on a temporal link between gold mineralization, magmatism, and continental margin transtension in the Jiaodong Gold Province, eastern Chinaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-1376&volume=111&issue=6&spage=741&epage=751&date=2003&atitle=40Ar/39Ar+Constraints+on+a+Temporal+Link+between+Gold+Mineralization,+Magmatism,+and+Continental+Margin+Transtension+in+the+Jiaodong+Gold+Province,+Eastern+Chinaen_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1086/378486en_HK
dc.identifier.scopuseid_2-s2.0-1242299769en_HK
dc.identifier.hkuros91733-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-1242299769&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume111en_HK
dc.identifier.issue6en_HK
dc.identifier.spage741en_HK
dc.identifier.epage751en_HK
dc.identifier.isiWOS:000187623600009-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLi, JW=36063037900en_HK
dc.identifier.scopusauthoridVasconcelos, PM=7005771965en_HK
dc.identifier.scopusauthoridZhang, J=7601337832en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridZhang, XJ=37092283800en_HK
dc.identifier.scopusauthoridYang, FH=7403450127en_HK

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