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DOI	10.1016/j.earscirev.2019.103030
	Provenance and tectonic setting of Upper Triassic turbidites in the eastern Tethyan Himalaya: Implications for early-stage evolution of the Neo–Tethys
	Liu Y.M.; Dai J.G.; Wang C.S.; Li H.A.; Wang Q.; Zhang L.L.
发表日期	2020
ISSN	00128252
卷号	200
英文摘要	Upper Triassic turbidites in the eastern Tethyan Himalaya preserve archives for early–stage evolution of the Neo–Tethys. However, their provenance and tectonic setting remain controversial. Here we report petrographic, detrital zircon U[sbnd]Pb and trace element data of newly discovered sandstones interbedded with layered basalts and whole–rock geochemical data of basalts from the Yumen mélange within Upper Triassic turbidites, and the same types of published data from associated terranes in the eastern Gondwana are compiled for comparison. The interbedded sandstones are dominated by quartz, lithics fragments and plagioclase grains, resembling those of the Langjiexue Group. All samples display similar ranges of detrital zircon U[sbnd]Pb ages, with significant age populations at 280–210 Ma, 650–450 Ma and 1200–800 Ma, comparable to those of the Langjiexue Group and coeval turbidites from Western Myanmar and partly from Central Tethyan Himalaya, implying they should share identical provenance. Trace elements of 300–200–Ma–aged zircons indicate they were derived from a continental magmatic arc. Geochemical data from interbedded basalts display typical within–plate–basalt affinity. Synthesized with regional geological setting, the above observations suggest Upper Triassic turbidites from Eastern and part of Central Tethyan Himalaya, and Western Myanmar were deposited in a marine rift basin of Indian passive continental margin with their primary provenance from Lhasa. However, other contemporaneous turbidites from part of Central Tethyan Himalaya and Australia had distinct primary sources from Indian continent and West Papua, respectively, indicating they may have separate deposystems. © 2019 Elsevier B.V.
关键词	Detrital zircon U[sbnd]Pb age Neo–Tethys Tethyan Himalaya Upper Triassic turbidite
英文关键词	basalt; detrital deposit; Gondwana; igneous geochemistry; petrography; provenance; sandstone; tectonic setting; trace element; Triassic; turbidite; uranium-lead dating; zircon; Himalayas
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203792
作者单位	School of Earth Science and Resources, and Research Center for Tibetan Plateau Geology, China University of Geosciences, Beijing, 100083, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, China
推荐引用方式 GB/T 7714	Liu Y.M.,Dai J.G.,Wang C.S.,等. Provenance and tectonic setting of Upper Triassic turbidites in the eastern Tethyan Himalaya: Implications for early-stage evolution of the Neo–Tethys[J],2020,200.
APA	Liu Y.M.,Dai J.G.,Wang C.S.,Li H.A.,Wang Q.,&Zhang L.L..(2020).Provenance and tectonic setting of Upper Triassic turbidites in the eastern Tethyan Himalaya: Implications for early-stage evolution of the Neo–Tethys.Earth Science Reviews,200.
MLA	Liu Y.M.,et al."Provenance and tectonic setting of Upper Triassic turbidites in the eastern Tethyan Himalaya: Implications for early-stage evolution of the Neo–Tethys".Earth Science Reviews 200(2020).