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Sequence and petrogenesis of the Jurassic volcanic rocks (Yeba Formation) in the Gangdese arc, southern Tibet: Implications for the Neo-Tethyan subduction
Liu, ZC (Liu, Zhi-Chao)1; Ding, L (Ding, Lin)2; Zhang, LY (Zhang, Li-Yun)2; Wang, C (Wang, Chao)2; Qiu, ZL (Qiu, Zhi-Li)1; Wang, JG (Wang, Jian-Gang)3; Shen, XL (Shen, Xiao-Li)4; Deng, XQ (Deng, Xiao-Qin)1
Source PublicationLITHOS
2018-07-01
Volume312Issue:0Pages:72-88
DOI10.1016/j.lithos.2018.04.026
AbstractThe Yeba Formation volcanic rocks in the Gangdese arc recorded important information regarding the early history of the Neo-Tethyan subduction. To explore their magmatic evolution and tectonic significance, we performed a systematic petrological, geochronological and geochemical study on these volcanic rocks. Our data indicated that the Yeba Formation documents a transition from andesite-dominated volcanism (which started before 182 Ma and continued until similar to 176 Ma) to bimodal volcanism (similar to 174-168 Ma) in the earliest Middle Jurassic. The early-stage andesite-dominated volcanics are characterized by various features of major and trace elements and are interpreted as the products of interactions between mantle-derived arc magmas and lower crustal melts. Their positive epsilon(Nd)(t) and epsilon(Hf)(t) values suggest a significant contribution of asthenosphere-like mantle. The late-stage bimodal volcanism is dominated by felsic rocks with subordinate basalts. Geochemical signatures of the basalts indicate a composite magma source that included a "subduction component", an asthenosphere-like upper mantle domain and an ancient subcontinental lithospheric mantle component. The felsic rocks of the late stage were produced mainly by the melting of juvenile crust, with some ancient crustal materials also involved. We suggest that the occurrence and preservation of the Yeba Formation volcanic rocks were tied to a tectonic switch from contraction to extension in the Gangdese arc, which probably resulted from slab rollback of the subducting Neo-Tethyan oceanic slab during the Jurassic. (C) 2018 Published by Elsevier B.V.
WOS IDWOS:000437064600005
Language英语
Indexed BySCIE
KeywordZIRCON U-PB LHASA TERRANE IMPLICATIONS HF ISOTOPIC CONSTRAINTS NEO-TETHYS SANGRI GROUP LU-HF TECTONIC IMPLICATIONS CONTINENTAL-CRUST INTRAOCEANIC ARC ZEDONG TERRANE
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
Cooperation Status国内
ISSN0024-4937
Department大陆碰撞与高原隆升重点实验室
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8613
Collection图书馆
Affiliation1.Sun Yat sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China;
2.Chinese Acad Sci, Key Lab Continental Collis & Plateau Uplift, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China;
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China;
4.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China.
Recommended Citation
GB/T 7714
Liu, ZC ,Ding, L ,Zhang, LY ,et al. Sequence and petrogenesis of the Jurassic volcanic rocks (Yeba Formation) in the Gangdese arc, southern Tibet: Implications for the Neo-Tethyan subduction[J]. LITHOS,2018,312(0):72-88.
APA Liu, ZC .,Ding, L .,Zhang, LY .,Wang, C .,Qiu, ZL .,...&Deng, XQ .(2018).Sequence and petrogenesis of the Jurassic volcanic rocks (Yeba Formation) in the Gangdese arc, southern Tibet: Implications for the Neo-Tethyan subduction.LITHOS,312(0),72-88.
MLA Liu, ZC ,et al."Sequence and petrogenesis of the Jurassic volcanic rocks (Yeba Formation) in the Gangdese arc, southern Tibet: Implications for the Neo-Tethyan subduction".LITHOS 312.0(2018):72-88.
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