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Article: Detrital zircon U-Pb ages along the Yarlung-Tsangpo suture zone, Tibet: Implications for oblique convergence and collision between India and Asia

TitleDetrital zircon U-Pb ages along the Yarlung-Tsangpo suture zone, Tibet: Implications for oblique convergence and collision between India and Asia
Authors
KeywordsCretaceous-Paleogene
Detrital zircon provenance
India-Asia collision
Oblique convergence
Yarlung-Tsangpo suture zone
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcr
Citation
Gondwana Research, 2011, v. 20 n. 4, p. 691-709 How to Cite?
AbstractAge-dating of detrital zircons from 22 samples collected along, and adjacent to, the Yarlung-Tsangpo suture zone, southern Tibet provides distinctive age-spectra that characterize important tectonostratigraphic units. Comparisons with data from Nepal, northern India and the Lhasa and Qiangtang terranes of central Tibet constrain possible sources of sediment, and the history of tectonic interactions.Sedimentary rocks in the Cretaceous-Paleogene Xigaze terrane exhibit strong Mesozoic detrital zircon peaks (120 and 170. Ma) together with considerable older inheritance in conglomeratic units. This forearc basin succession developed in association with a continental volcanic arc hinterland in response to Neotethyan subduction under the southern edge of the Eurasia. Conspicuous sediment/source hinterland mismatches suggest that plate convergence along this continental margin was oblique during the Late Cretaceous. The forearc region may have been translated >. 500 km dextrally from an original location nearer to Myanmar.Tethyan Himalayan sediments on the other side of the Yarlung-Tsangpo suture zone reveal similar older inheritance and although Cretaceous sediments formed 1000s of km and across at least one plate boundary from those in the Xigaze terrane they too contain an appreciable mid-Early Cretaceous (123. Ma) component. In this case it is attributed to volcanism associated with Gondwana breakup.Sedimentary overlap assemblages reveal interactions between colliding terranes. Paleocene Liuqu conglomerates contain a cryptic record of Late Jurassic and Cretaceous rock units that appear to have foundered during a Paleocene collision event prior the main India-Asia collision. Detrital zircons as young as 37. Ma from the upper Oligocene post-collisional Gangrinboche conglomerates indicate that subduction-related convergent margin magmatism continued through until at least Middle and probably Late Eocene along the southern margin of Eurasia (Lhasa terrane).Although the ages of detrital zircons in some units appear compatible with more than one potential source with care other geological relationships can be used to further constrain some linkages and eliminate others. The results document various ocean closure and collision events and when combined with other geological information this new dataset permits a more refined understanding of the time-space evolution of the Cenozoic India-Asia collision system. © 2011 International Association for Gondwana Research.
Persistent Identifierhttp://hdl.handle.net/10722/145555
ISSN
2015 Impact Factor: 8.743
2015 SCImago Journal Rankings: 4.949
ISI Accession Number ID
Funding AgencyGrant Number
Stephen S.F. Hui Trust
Research Grants Council of the Hong Kong Special Administrative Region, ChinaHKU 7001/04P
HKU7001/07P
Funding Information:

We thank members of the Tibetan Ministry of Geology and Resources and the Tibetan Geological Society as well as fellow members of the HKUTRG whose efforts have helped to make this research possible. Many of our Tibetan friends have assisted with arranging logistics and permission. We thank Sun-Lin Chung and Fu-Yuan Wu for earlier discussions on the interpretation of Tibetan detrital zircon data. This work was supported by grants (to JCA) from the Stephen S.F. Hui Trust Fund, Research Grants Council of the Hong Kong Special Administrative Region, China (Projects HKU 7001/04P and HKU7001/07P) and the HKU CRCG. We would like to thank Peter Cawood, Erdin Bozkurt, George Gehrels, Wenjiao Xiao, Solomon Buckman and Guochun Zhao for their constructive reviews and comments that have helped to improve this manuscript.

References
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DC FieldValueLanguage
dc.contributor.authorAitchison, JCen_HK
dc.contributor.authorXia, Xen_HK
dc.contributor.authorBaxter, ATen_HK
dc.contributor.authorAli, JRen_HK
dc.date.accessioned2012-02-28T01:54:04Z-
dc.date.available2012-02-28T01:54:04Z-
dc.date.issued2011en_HK
dc.identifier.citationGondwana Research, 2011, v. 20 n. 4, p. 691-709en_HK
dc.identifier.issn1342-937Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/145555-
dc.description.abstractAge-dating of detrital zircons from 22 samples collected along, and adjacent to, the Yarlung-Tsangpo suture zone, southern Tibet provides distinctive age-spectra that characterize important tectonostratigraphic units. Comparisons with data from Nepal, northern India and the Lhasa and Qiangtang terranes of central Tibet constrain possible sources of sediment, and the history of tectonic interactions.Sedimentary rocks in the Cretaceous-Paleogene Xigaze terrane exhibit strong Mesozoic detrital zircon peaks (120 and 170. Ma) together with considerable older inheritance in conglomeratic units. This forearc basin succession developed in association with a continental volcanic arc hinterland in response to Neotethyan subduction under the southern edge of the Eurasia. Conspicuous sediment/source hinterland mismatches suggest that plate convergence along this continental margin was oblique during the Late Cretaceous. The forearc region may have been translated >. 500 km dextrally from an original location nearer to Myanmar.Tethyan Himalayan sediments on the other side of the Yarlung-Tsangpo suture zone reveal similar older inheritance and although Cretaceous sediments formed 1000s of km and across at least one plate boundary from those in the Xigaze terrane they too contain an appreciable mid-Early Cretaceous (123. Ma) component. In this case it is attributed to volcanism associated with Gondwana breakup.Sedimentary overlap assemblages reveal interactions between colliding terranes. Paleocene Liuqu conglomerates contain a cryptic record of Late Jurassic and Cretaceous rock units that appear to have foundered during a Paleocene collision event prior the main India-Asia collision. Detrital zircons as young as 37. Ma from the upper Oligocene post-collisional Gangrinboche conglomerates indicate that subduction-related convergent margin magmatism continued through until at least Middle and probably Late Eocene along the southern margin of Eurasia (Lhasa terrane).Although the ages of detrital zircons in some units appear compatible with more than one potential source with care other geological relationships can be used to further constrain some linkages and eliminate others. The results document various ocean closure and collision events and when combined with other geological information this new dataset permits a more refined understanding of the time-space evolution of the Cenozoic India-Asia collision system. © 2011 International Association for Gondwana Research.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcren_HK
dc.relation.ispartofGondwana Researchen_HK
dc.subjectCretaceous-Paleogeneen_HK
dc.subjectDetrital zircon provenanceen_HK
dc.subjectIndia-Asia collisionen_HK
dc.subjectOblique convergenceen_HK
dc.subjectYarlung-Tsangpo suture zoneen_HK
dc.titleDetrital zircon U-Pb ages along the Yarlung-Tsangpo suture zone, Tibet: Implications for oblique convergence and collision between India and Asiaen_HK
dc.typeArticleen_HK
dc.identifier.emailAitchison, JC: jona@hku.hken_HK
dc.identifier.emailXia, X: xpxia@hotmail.comen_HK
dc.identifier.emailAli, JR: jrali@hku.hken_HK
dc.identifier.authorityAitchison, JC=rp00658en_HK
dc.identifier.authorityXia, X=rp00815en_HK
dc.identifier.authorityAli, JR=rp00659en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.gr.2011.04.002en_HK
dc.identifier.scopuseid_2-s2.0-80052681394en_HK
dc.identifier.hkuros198645en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80052681394&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume20en_HK
dc.identifier.issue4en_HK
dc.identifier.spage691en_HK
dc.identifier.epage709en_HK
dc.identifier.isiWOS:000295754700003-
dc.publisher.placeNetherlandsen_HK
dc.relation.projectA study of the Neotethyan suture around Mt Kailas, western Tibet - a link between the Indus and Yarlung Tsangpo suture zones-
dc.identifier.scopusauthoridAitchison, JC=7102533858en_HK
dc.identifier.scopusauthoridXia, X=35241486400en_HK
dc.identifier.scopusauthoridBaxter, AT=35069077600en_HK
dc.identifier.scopusauthoridAli, JR=7102266465en_HK

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