Geochemistry and Nd isotopes of Lower Permian siliciclastic rocks from central Tibet, western China: Evidence for Early Permian initiation of the rifting between the Lhasa and Qiangtang blocks?
文献类型：期刊论文
| 作者 | Yan, Li-Long1; Zeng, Lu1,2; Wang, Yang1 ; Tang, Xian-Chun3
|
| 刊名 | GEOLOGICAL JOURNAL
 |
| 出版日期 | 2019-07-02 |
| 页码 | 15 |
| 关键词 | geochemistry mantle plume Meso-Tethys Permian rifting siliciclastic rocks Tibet |
| ISSN号 | 0072-1050 |
| DOI | 10.1002/gj.3564 |
| 通讯作者 | Tang, Xian-Chun(tangxianchun@cags.ac.cn) |
| 英文摘要 | Fifteen Lower Permian siliciclastic rocks from central Tibet were analysed for the major and trace elements, and ten samples among them were chosen for determination of Nd isotopic compositions. They are characterized by low concentrations of SiO2 and low ratios of SiO2/Al2O3, moderate abundances of Fe2O3 + MgO (mudstones, 7.28-9.72 wt.%; sandstones, 4.62-10.02 wt.%) and TiO2 (mudstones, 0.55-0.95 wt.%; sandstones, 0.53-0.99 wt.%), significant enrichments of light rare-earth elements (LREEs) relative to the heavy REEs (HREEs; average (La/Yb)(N) = 9.8 [mudstones] and 9.48 [sandstones]), flat HREE distribution, obvious negative Eu anomalies (average Eu/Eu* = 0.68), higher Th/Sc and La/Sc ratios, and negative initial epsilon(Nd) values (on average -7.2 and -8.5 for sandstones and mudstones, respectively). The mixing modal analysis based on some elemental pairs and Nd isotopic composition, respectively, Nd depleted mantle model age (T-DM) and initial epsilon(Nd) values, uniformly indicates that about 30-40% mafic materials could have been added into these sedimentary rocks. These siliciclastic rocks could have formed in a setting of rifting between the Lhasa and Qiangtang blocks, when a 280 Ma mantle plume upwelling event was occurring in northern Gondwana. |
| WOS关键词 | NORTHERN TIBET ; TECTONIC EVOLUTION ; CRUSTAL EVOLUTION ; SEDIMENTARY-ROCKS ; PROVENANCE ; CONSTRAINTS ; GONDWANALAND ; TURBIDITES ; MAGMATISM ; TERRANE |
| 资助项目 | China Geology Survey[DD20190132] ; National Natural Science Foundation of China[41877197] ; National Natural Science Foundation of China[41602257] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000475826800001 |
| 出版者 | WILEY |
| 资助机构 | China Geology Survey ; National Natural Science Foundation of China |
| 源URL | [http://ir.imde.ac.cn/handle/131551/26776]  |
| 专题 | 中国科学院水利部成都山地灾害与环境研究所 |
| 通讯作者 | Tang, Xian-Chun |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Key Lab Computat Geodynam, Asian Tecton Res Grp, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Sichuan, Peoples R China 3.Chinese Acad Geol Sci, SinoProbe Ctr, Beijing 100037, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Li-Long,Zeng, Lu,Wang, Yang,et al. Geochemistry and Nd isotopes of Lower Permian siliciclastic rocks from central Tibet, western China: Evidence for Early Permian initiation of the rifting between the Lhasa and Qiangtang blocks?[J]. GEOLOGICAL JOURNAL,2019:15. |
| APA | Yan, Li-Long,Zeng, Lu,Wang, Yang,&Tang, Xian-Chun.(2019).Geochemistry and Nd isotopes of Lower Permian siliciclastic rocks from central Tibet, western China: Evidence for Early Permian initiation of the rifting between the Lhasa and Qiangtang blocks?.GEOLOGICAL JOURNAL,15. |
| MLA | Yan, Li-Long,et al."Geochemistry and Nd isotopes of Lower Permian siliciclastic rocks from central Tibet, western China: Evidence for Early Permian initiation of the rifting between the Lhasa and Qiangtang blocks?".GEOLOGICAL JOURNAL (2019):15. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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