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Article: Accretionary tectonics of the Western Kunlun Orogen, China: A Paleozoic-Early Mesozoic, long-lived active continental margin with implications for the growth of Southern Eurasia

TitleAccretionary tectonics of the Western Kunlun Orogen, China: A Paleozoic-Early Mesozoic, long-lived active continental margin with implications for the growth of Southern Eurasia
Authors
Issue Date2005
PublisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/JG
Citation
Journal Of Geology, 2005, v. 113 n. 6, p. 687-705 How to Cite?
AbstractOur new SHRIMP U-Pb zircon ages from the Western Kunlun Orogen allow us to constrain the history of an active continental margin developed on the southern boundary of the Tarim block from the Ordovician to the Triassic. A 492 ± 7-Ma dacite from Yixieke extrusive rocks that contain 220 ± 5-Ma reheated zircons is interpreted as an intraoceanic arc complex that accreted to the Tarim block. The Yirba granodiorite has a continental arc geochemical signature, a 471 ± 5-Ma U-Pb crystallization age, and 491 ± 3-Ma inherited zircons. It formed during the first, early Paleozoic stage of an active continental margin arc that was juxtaposed to the south against the Kudi high-grade gneiss complex, the Buziwan ophiolite, and the Yixieke volcanic and sedimentary rocks. Zircons from a paragneiss in the Kudi gneiss complex range in age from 398 ± 12 to 1345 ± 31 Ma; the oldest reflect protolith ages of a gneissic continental block (incorporated into the trench), and the youngest may represent the age of a refoliated high-grade fabric created during accretion. The Buziwan ophiolite occupies a thrust sheet tectonically overlying the Kudi gneiss complex. A leuco-gabbro pegmatite, with a zircon age of 403 ± 7 Ma and ca. 490-Ma inherited zircons, and the North Kudi granite, with a zircon age of 408 ± 7 Ma, were emplaced during the second mid-Paleozoic stage of the active continental margin. The Akarz subduction-related granite that has a 214 ± 1-Ma zircon crystallization age formed during the final, early Mesozoic stage of the active margin. The long-lasting active continental margin in the western Kunlun forms a key, well-documented section of the Andean-type margin that extends from the Caucasus to the Qinling. © 2005 by The University of Chicago. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/72768
ISSN
2015 Impact Factor: 2.58
2015 SCImago Journal Rankings: 1.344
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorXiao, WJen_HK
dc.contributor.authorWindley, BFen_HK
dc.contributor.authorLiu, DYen_HK
dc.contributor.authorJian, Pen_HK
dc.contributor.authorLui, CZen_HK
dc.contributor.authorYuan, Cen_HK
dc.contributor.authorSun, Men_HK
dc.date.accessioned2010-09-06T06:44:55Z-
dc.date.available2010-09-06T06:44:55Z-
dc.date.issued2005en_HK
dc.identifier.citationJournal Of Geology, 2005, v. 113 n. 6, p. 687-705en_HK
dc.identifier.issn0022-1376en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72768-
dc.description.abstractOur new SHRIMP U-Pb zircon ages from the Western Kunlun Orogen allow us to constrain the history of an active continental margin developed on the southern boundary of the Tarim block from the Ordovician to the Triassic. A 492 ± 7-Ma dacite from Yixieke extrusive rocks that contain 220 ± 5-Ma reheated zircons is interpreted as an intraoceanic arc complex that accreted to the Tarim block. The Yirba granodiorite has a continental arc geochemical signature, a 471 ± 5-Ma U-Pb crystallization age, and 491 ± 3-Ma inherited zircons. It formed during the first, early Paleozoic stage of an active continental margin arc that was juxtaposed to the south against the Kudi high-grade gneiss complex, the Buziwan ophiolite, and the Yixieke volcanic and sedimentary rocks. Zircons from a paragneiss in the Kudi gneiss complex range in age from 398 ± 12 to 1345 ± 31 Ma; the oldest reflect protolith ages of a gneissic continental block (incorporated into the trench), and the youngest may represent the age of a refoliated high-grade fabric created during accretion. The Buziwan ophiolite occupies a thrust sheet tectonically overlying the Kudi gneiss complex. A leuco-gabbro pegmatite, with a zircon age of 403 ± 7 Ma and ca. 490-Ma inherited zircons, and the North Kudi granite, with a zircon age of 408 ± 7 Ma, were emplaced during the second mid-Paleozoic stage of the active continental margin. The Akarz subduction-related granite that has a 214 ± 1-Ma zircon crystallization age formed during the final, early Mesozoic stage of the active margin. The long-lasting active continental margin in the western Kunlun forms a key, well-documented section of the Andean-type margin that extends from the Caucasus to the Qinling. © 2005 by The University of Chicago. All rights reserved.en_HK
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.titleAccretionary tectonics of the Western Kunlun Orogen, China: A Paleozoic-Early Mesozoic, long-lived active continental margin with implications for the growth of Southern Eurasiaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-1376&volume=113&spage=687&epage=705.&date=2005&atitle=Accretionary+tectonics+of+the+Western+Kunlun+orogen,+China:+A+Paleozoic-Early+Mesozoic,+Long-lived+active+continental+margin+with+implications+for+the+growth+of+southern+Eurasia.+en_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1086/449326en_HK
dc.identifier.scopuseid_2-s2.0-27744486538en_HK
dc.identifier.hkuros127649en_HK
dc.identifier.hkuros120056-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-27744486538&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume113en_HK
dc.identifier.issue6en_HK
dc.identifier.spage687en_HK
dc.identifier.epage705en_HK
dc.identifier.isiWOS:000232569900005-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridXiao, WJ=7202456615en_HK
dc.identifier.scopusauthoridWindley, BF=7006726637en_HK
dc.identifier.scopusauthoridLiu, DY=7410099304en_HK
dc.identifier.scopusauthoridJian, P=7003645708en_HK
dc.identifier.scopusauthoridLui, CZ=9239037200en_HK
dc.identifier.scopusauthoridYuan, C=35241599200en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK

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