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Article: 40Ar-39Ar abd U-Pb ages of metadiorite from the East Kunlun orogenic belt: evidence for Early Paleozoic magmatic zone and excess argon in amphibole minerals

Title40Ar-39Ar abd U-Pb ages of metadiorite from the East Kunlun orogenic belt: evidence for Early Paleozoic magmatic zone and excess argon in amphibole minerals
Authors
KeywordsEast kunlun orogenic belt
Excess argon
Geochronology
Metadiorite
Amphibole
Issue Date2001
PublisherScience China Press. The Journal's web site is located at http://www.springerlink.com/content/1001-6538/
Citation
Chinese Science Bulletin, 2001, v. 46 n. 4, p. 330-333 How to Cite?
AbstractSingle-grain zircon U-Pb and amphibole 40Ar-39Ar dating have been conducted on a deformed and metamorphosed diorite in the East Kunlun Orogenic Belt, which intruded into the middle Proterozoic Kahai Group exposed in the south of Xiangride region, Dulan County, NW Qinghai Province. The zircon gives a concordant U-Pb age of (446.5±9.1) Ma. The amphibole yields Ar plateau age of (488.0±1.2) Ma and an isochronal age of (488.9±5.6) Ma. Age results of both stepwise released Ar and conventional K-Ar analysis are remarkably higher than that of zircon U-Pb, suggesting that the amphibole contains excess argon and the amphibole plateau age cannot be taken as the timing of metamorphism or deformation. The zircon age is interpreted to be crystallization age of the diorite pluton, which suggests that an Early-Paleozoic magmatic zone indeed existed in the East Kunlun Orogenic Belt stretching along the region south to the Golmud, Normuhong and Xiangride.
Persistent Identifierhttp://hdl.handle.net/10722/72468
ISSN
2015 Impact Factor: 1.789

 

DC FieldValueLanguage
dc.contributor.authorChen, Nen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorZhang, KXen_HK
dc.contributor.authorZhu, YHen_HK
dc.date.accessioned2010-09-06T06:42:07Z-
dc.date.available2010-09-06T06:42:07Z-
dc.date.issued2001en_HK
dc.identifier.citationChinese Science Bulletin, 2001, v. 46 n. 4, p. 330-333en_HK
dc.identifier.issn1001-6538en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72468-
dc.description.abstractSingle-grain zircon U-Pb and amphibole 40Ar-39Ar dating have been conducted on a deformed and metamorphosed diorite in the East Kunlun Orogenic Belt, which intruded into the middle Proterozoic Kahai Group exposed in the south of Xiangride region, Dulan County, NW Qinghai Province. The zircon gives a concordant U-Pb age of (446.5±9.1) Ma. The amphibole yields Ar plateau age of (488.0±1.2) Ma and an isochronal age of (488.9±5.6) Ma. Age results of both stepwise released Ar and conventional K-Ar analysis are remarkably higher than that of zircon U-Pb, suggesting that the amphibole contains excess argon and the amphibole plateau age cannot be taken as the timing of metamorphism or deformation. The zircon age is interpreted to be crystallization age of the diorite pluton, which suggests that an Early-Paleozoic magmatic zone indeed existed in the East Kunlun Orogenic Belt stretching along the region south to the Golmud, Normuhong and Xiangride.-
dc.languageengen_HK
dc.publisherScience China Press. The Journal's web site is located at http://www.springerlink.com/content/1001-6538/en_HK
dc.relation.ispartofChinese Science Bulletinen_HK
dc.relation.ispartof科学通报-
dc.subjectEast kunlun orogenic belt-
dc.subjectExcess argon-
dc.subjectGeochronology-
dc.subjectMetadiorite-
dc.subjectAmphibole-
dc.title40Ar-39Ar abd U-Pb ages of metadiorite from the East Kunlun orogenic belt: evidence for Early Paleozoic magmatic zone and excess argon in amphibole mineralsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1001-6538&volume=46 &issue=4&spage=330&epage=333&date=2001&atitle=40Ar-39Ar+abd+U-Pb+ages+of+metadiorite+from+the+East+Kunlun+orogenic+belt:+evidence+for+Early+Paleozoic+magmatic+zone+and+excess+argon+in+amphibole+minerals.en_HK
dc.identifier.emailChen, N: chenns77@hku.hken_HK
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0035009021-
dc.identifier.hkuros58001en_HK
dc.identifier.hkuros58086-
dc.identifier.volume46-
dc.identifier.issue4-
dc.identifier.spage330-
dc.identifier.epage333-
dc.publisher.placeChina-
dc.customcontrol.immutablesml 130308-

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