Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/18434
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dc.contributor.authorNie, Xiaomeien
dc.contributor.authorFeng, Qinglaien
dc.contributor.authorMetcalfe, Ianen
dc.contributor.authorBaxter, Alanen
dc.contributor.authorLiu, Guichunen
dc.date.accessioned2016-01-15T13:43:00Z
dc.date.issued2016en
dc.identifier.citationJournal of Asian Earth Sciences, v.118, p. 32-50en
dc.identifier.issn1878-5786en
dc.identifier.issn1367-9120en
dc.identifier.urihttps://hdl.handle.net/1959.11/18434en
dc.description.abstractThe Tibetan Plateau and western Yunnan are known to have formed by the amalgamation of Gondwana-derived continental blocks and arc terranes as a result of Tethyan subduction followed by continental collisions during the Paleozoic, Mesozoic and Cenozoic. The Devonian and the southern Lancangjiang zone, western Yunnan is a critical period and key region for studying the transformation between the "Proto-Tethyan" and Paleo-Tethyan oceanic systems. New geochemical data and LA-ICPMS U-Pb zircon ages of the Late Devonian volcanogenic sediments from the southern Lancangjiang zone in western Yunnan, SW China, are presented. The studied sedimentary rocks of the Nanguang Formation are volcaniclastic rocks with high volcanic lithic content (55-65%, mostly andesite, dacite, with some rhyolite and tuffs). Whole rock geochemistry, zircon trace elements and detrital modal analyses indicate derivation from a subduction-related magmatic arc. Three tuff samples yield Late Devonian weighted mean 206Pb/238U ages of 378 ± 4 Ma, 366 ± 5 Ma and 382 ± 8 Ma, suggesting a Late Devonian depositional age. 104 zircon U-Pb analyses on 104 zircon grains from two sandstone samples present extremely tight age clusters, mostly ranging from 380 Ma to 360 Ma. This indicates a single Late Devonian igneous source. A short transport distance and a high rate of denudation and deposition within an arc-related basin are considered likely for the tuffs and volcaniclastic rocks in this study. This implies the presence of an as yet unidentified Late Devonian magmatic arc in the southern Lancangjiang zone. The cryptic Late Devonian arc is likely to represent either a continuation of Late Ordovician-Late Silurian "Proto-Tethyan" subduction or the initial stage of the Paleo-Tethyan Lincang Arc and indicates that subduction of the Changning-Menglian ocean beneath the Simao/Indochina Block occurred in the Late Devonian.en
dc.languageenen
dc.publisherPergamon Pressen
dc.relation.ispartofJournal of Asian Earth Sciencesen
dc.titleDiscovery of a Late Devonian magmatic arc in the southern Lancangjiang zone, western Yunnan: Geochemical and zircon U-Pb geochronological constraints on the evolution of Tethyan ocean basins in SW Chinaen
dc.typeJournal Articleen
dc.identifier.doi10.1016/j.jseaes.2015.12.026en
dc.subject.keywordsInorganic Geochemistryen
dc.subject.keywordsTectonicsen
dc.subject.keywordsGeochronologyen
local.contributor.firstnameXiaomeien
local.contributor.firstnameQinglaien
local.contributor.firstnameIanen
local.contributor.firstnameAlanen
local.contributor.firstnameGuichunen
local.subject.for2008040313 Tectonicsen
local.subject.for2008040303 Geochronologyen
local.subject.for2008040202 Inorganic Geochemistryen
local.subject.seo2008840199 Mineral Exploration not elsewhere classifieden
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailxnie@une.edu.auen
local.profile.emailqinglaifeng@cug.edu.cnen
local.profile.emailimetcal2@une.edu.auen
local.profile.emailabaxter9@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20160114-123029en
local.publisher.placeUnited Kingdomen
local.format.startpage32en
local.format.endpage50en
local.peerreviewedYesen
local.identifier.volume118en
local.title.subtitleGeochemical and zircon U-Pb geochronological constraints on the evolution of Tethyan ocean basins in SW Chinaen
local.contributor.lastnameNieen
local.contributor.lastnameFengen
local.contributor.lastnameMetcalfeen
local.contributor.lastnameBaxteren
local.contributor.lastnameLiuen
dc.identifier.staffune-id:xnieen
dc.identifier.staffune-id:imetcal2en
dc.identifier.staffune-id:abaxter9en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:18638en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleDiscovery of a Late Devonian magmatic arc in the southern Lancangjiang zone, western Yunnanen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.description.statisticsepubsVisitors: 387<br />Views: 466<br />Downloads: 0en
local.search.authorNie, Xiaomeien
local.search.authorFeng, Qinglaien
local.search.authorMetcalfe, Ianen
local.search.authorBaxter, Alanen
local.search.authorLiu, Guichunen
local.uneassociationUnknownen
local.year.published2016en
local.subject.for2020undefineden
local.subject.for2020370502 Geochronologyen
local.subject.for2020370302 Inorganic geochemistryen
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