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Article: Tectonic implications of felsic tuffs within the Lower Miocene Gangrinboche conglomerates, southern Tibet

TitleTectonic implications of felsic tuffs within the Lower Miocene Gangrinboche conglomerates, southern Tibet
Authors
KeywordsAdakite
Collision
Dacite
Miocene
Molasse
Slab break-off
Tibet
Issue Date2009
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaes
Citation
Journal Of Asian Earth Sciences, 2009, v. 34 n. 3, p. 287-297 How to Cite?
AbstractFelsic tuffs are interbedded with the Gangrinboche conglomerates adjacent to the Yarlung Tsangpo suture zone in southern Tibet. Laser Ar/Ar dating of mineral separates indicates they are of Early Miocene age. Such tuffs are most likely an eruptive manifestation of geochemically indistinguishable coeval felsic (adakitic) intrusions that are widely reported across southern Tibet. The considerable lateral (E-W) extent of the Gangrinboche conglomerates and their depositional setting indicates sediment accumulation in an overall N-S compressional regime and thereby places important constraints on the tectonic setting in which magmatism initiated. The conglomerates were folded and truncated during back-thrusting associated with development of the north-directed Great Counter thrust. As N-S trending rifts associated with E-W extension of the Tibetan Plateau cut both the conglomerates and this thrust system it can be inferred that post-collisional volcanism is unlikely to have been genetically linked to later E-W extension. Early Miocene slab break-off beneath Tibet provides a model that appears to be consistent with petrogenesis of the associated magmatic suite, which requires a lowermost crust or lithospheric mantle generation, molasse accumulation, and uplift and emplacement of North Himalayan gneiss domes. © 2008 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/72600
ISSN
2015 Impact Factor: 2.647
2015 SCImago Journal Rankings: 1.393
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorAitchison, JCen_HK
dc.contributor.authorAli, JRen_HK
dc.contributor.authorChan, Aen_HK
dc.contributor.authorDavis, AMen_HK
dc.contributor.authorLo, CHen_HK
dc.date.accessioned2010-09-06T06:43:21Z-
dc.date.available2010-09-06T06:43:21Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal Of Asian Earth Sciences, 2009, v. 34 n. 3, p. 287-297en_HK
dc.identifier.issn1367-9120en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72600-
dc.description.abstractFelsic tuffs are interbedded with the Gangrinboche conglomerates adjacent to the Yarlung Tsangpo suture zone in southern Tibet. Laser Ar/Ar dating of mineral separates indicates they are of Early Miocene age. Such tuffs are most likely an eruptive manifestation of geochemically indistinguishable coeval felsic (adakitic) intrusions that are widely reported across southern Tibet. The considerable lateral (E-W) extent of the Gangrinboche conglomerates and their depositional setting indicates sediment accumulation in an overall N-S compressional regime and thereby places important constraints on the tectonic setting in which magmatism initiated. The conglomerates were folded and truncated during back-thrusting associated with development of the north-directed Great Counter thrust. As N-S trending rifts associated with E-W extension of the Tibetan Plateau cut both the conglomerates and this thrust system it can be inferred that post-collisional volcanism is unlikely to have been genetically linked to later E-W extension. Early Miocene slab break-off beneath Tibet provides a model that appears to be consistent with petrogenesis of the associated magmatic suite, which requires a lowermost crust or lithospheric mantle generation, molasse accumulation, and uplift and emplacement of North Himalayan gneiss domes. © 2008 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaesen_HK
dc.relation.ispartofJournal of Asian Earth Sciencesen_HK
dc.subjectAdakiteen_HK
dc.subjectCollisionen_HK
dc.subjectDaciteen_HK
dc.subjectMioceneen_HK
dc.subjectMolasseen_HK
dc.subjectSlab break-offen_HK
dc.subjectTibeten_HK
dc.titleTectonic implications of felsic tuffs within the Lower Miocene Gangrinboche conglomerates, southern Tibeten_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1367-9120&volume=doi:101016/jjseaes200805008&spage=&epage=&date=2008&atitle=Tectonic+implications+of+felsic+tuffs+within+the+Lower+Miocene+Gangrinboche+conglomerates,+southern+Tibeten_HK
dc.identifier.emailAitchison, JC: jona@hku.hken_HK
dc.identifier.emailAli, JR: jrali@hku.hken_HK
dc.identifier.authorityAitchison, JC=rp00658en_HK
dc.identifier.authorityAli, JR=rp00659en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jseaes.2008.05.008en_HK
dc.identifier.scopuseid_2-s2.0-55349135861en_HK
dc.identifier.hkuros150816en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-55349135861&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume34en_HK
dc.identifier.issue3en_HK
dc.identifier.spage287en_HK
dc.identifier.epage297en_HK
dc.identifier.isiWOS:000261710500005-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridAitchison, JC=7102533858en_HK
dc.identifier.scopusauthoridAli, JR=7102266465en_HK
dc.identifier.scopusauthoridChan, A=55465255500en_HK
dc.identifier.scopusauthoridDavis, AM=7404295484en_HK
dc.identifier.scopusauthoridLo, CH=35078881900en_HK

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