Sequence and petrogenesis of the Jurassic volcanic rocks (Yeba Formation) in the Gangdese arc, southern Tibet: Implications for the Neo-Tethyan subduction
文献类型：期刊论文
| 作者 | Wang, JG (Wang, Jian-Gang)3; Deng, XQ (Deng, Xiao-Qin)1; 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; Shen, XL (Shen, Xiao-Li)4 |
| 刊名 | LITHOS
 |
| 出版日期 | 2018-07-01 |
| 卷号 | 312期号:0页码:72-88 |
| ISSN号 | 0024-4937 |
| 关键词 | ZIRCON U-PB LHASA TERRANE IMPLICATIONS HF ISOTOPIC CONSTRAINTS NEO-TETHYS SANGRI GROUP LU-HF TECTONIC IMPLICATIONS CONTINENTAL-CRUST INTRAOCEANIC ARC ZEDONG TERRANE |
| DOI | 10.1016/j.lithos.2018.04.026 |
| 英文摘要 | The 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研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000437064600005 |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/8613]  |
| 专题 | 青藏高原研究所_图书馆 |
| 作者单位 | 1.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. |
| 推荐引用方式 GB/T 7714 | Wang, JG ,Deng, XQ ,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[J]. LITHOS,2018,312(0):72-88. |
| APA | Wang, JG .,Deng, XQ .,Liu, ZC .,Ding, L .,Zhang, LY .,...&Shen, XL .(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 | Wang, JG ,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. |
入库方式： OAI收割
来源：青藏高原研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。