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Provenance of the early to mid-Paleozoic sediments in the northern Alxa area: Implications for tectonic evolution of the southwestern Central Asian Orogenic Belt

dc.contributor.authorChen, Yan
dc.contributor.authorWu, Tairan
dc.contributor.authorGan, Lisheng
dc.contributor.authorZhang, Zhicheng
dc.contributor.authorFu, Bin
dc.date.accessioned2020-03-31T03:17:40Z
dc.date.issued2019
dc.date.updated2019-11-25T07:46:20Z
dc.description.abstractThe continental fragments in Northwest China are key to revealing the tectonic and crustal evolution of the Central Asian Orogenic Belt (CAOB). However, their tectonic correlation, affinity and implications have not been well defined. The early to mid-Paleozoic sediments in the northern Alxa area can help to understand this question. These sediments were deposited in a deep to shallow marine environment during a regression. The southeast paleocurrent attributes their provenance to the northwest. Detrital zircons from the collected sandstones record peak ages of approximately 1726 Ma, 1462 Ma, 915 Ma and 438 Ma. The zircon εHf(t) values are negative to positive at 1726 Ma, 915 Ma and 438 Ma, but only positive at 1462 Ma. The detrital zircon U–Pb ages and Hf isotopes suggest the provenance to be the blocks in Central Tianshan and Southern Beishan or their analogs, rather than the Tarim Craton. The source blocks show no tectonic affinity to the Tarim Craton but might be accreted to it in the Neoproterozoic Rodinia. The provenance analyses show tectonic correlation among the northern Alxa, Tianshan and Beishan orogenic belts. The Late Devonian molasse deposits, geochemical shifting to continental margins and suddenly increased early Paleozoic zircons indicate an arc-continent collision. The discovery of more indicators for continental fragments advocates a multiterrane model and dominant crustal reworking/contamination for the tectonocrustal evolution of the CAOB at least during the early to mid-Paleozoic.en_AU
dc.description.sponsorshipThis work was funded by the National Natural Science Foundation of China (41372225), National Key Basic Research Program of China (2013CB429801) and China Scholarship Council (201606010074).en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn1342-937Xen_AU
dc.identifier.urihttp://hdl.handle.net/1885/202549
dc.language.isoen_AUen_AU
dc.publisherElsevieren_AU
dc.rights© 2018 International Association for Gondwana Research. Published by Elsevier B.Ven_AU
dc.sourceGondwana Researchen_AU
dc.titleProvenance of the early to mid-Paleozoic sediments in the northern Alxa area: Implications for tectonic evolution of the southwestern Central Asian Orogenic Belten_AU
dc.typeJournal articleen_AU
local.bibliographicCitation.lastpage130en_AU
local.bibliographicCitation.startpage115en_AU
local.contributor.affiliationChen, Yan, College of Science, ANUen_AU
local.contributor.affiliationWu, Tairan, Peking Universityen_AU
local.contributor.affiliationGan, Lisheng, Peking Universityen_AU
local.contributor.affiliationZhang, Zhicheng, Peking Universityen_AU
local.contributor.affiliationFu, Bin, College of Science, ANUen_AU
local.contributor.authoremailrepository.admin@anu.edu.auen_AU
local.contributor.authoruidChen, Yan, u1029228en_AU
local.contributor.authoruidFu, Bin, u5078757en_AU
local.description.embargo2037-12-31
local.description.notesImported from ARIESen_AU
local.identifier.absfor040303 - Geochronologyen_AU
local.identifier.absfor040313 - Tectonicsen_AU
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciencesen_AU
local.identifier.ariespublicationu3102795xPUB898en_AU
local.identifier.citationvolume67en_AU
local.identifier.doi10.1016/j.gr.2018.10.017en_AU
local.identifier.scopusID2-s2.0-85058621524
local.identifier.uidSubmittedByu3102795en_AU
local.publisher.urlhttps://www.elsevier.com/en_AU
local.type.statusPublished Versionen_AU

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