KMS Institute of Mountain Hazards and Environment,CAS
| 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? | |
| Yan, Li-Long1; Zeng, Lu1,2; Wang, Yang1; Tang, Xian-Chun3 | |
| Corresponding Author | Tang, Xian-Chun(tangxianchun@cags.ac.cn) |
| 2019-07-02 | |
| Source Publication | GEOLOGICAL JOURNAL
 |
| ISSN | 0072-1050 |
| Pages | 15 |
| Abstract | 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. |
| Keyword | geochemistry mantle plume Meso-Tethys Permian rifting siliciclastic rocks Tibet |
| DOI | 10.1002/gj.3564 |
| Indexed By | SCI |
| WOS Keyword | NORTHERN TIBET ; TECTONIC EVOLUTION ; CRUSTAL EVOLUTION ; SEDIMENTARY-ROCKS ; PROVENANCE ; CONSTRAINTS ; GONDWANALAND ; TURBIDITES ; MAGMATISM ; TERRANE |
| Language | 英语 |
| Funding Project | China Geology Survey[DD20190132] ; National Natural Science Foundation of China[41877197] ; National Natural Science Foundation of China[41602257] |
| WOS Research Area | Geology |
| WOS Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000475826800001 |
| Funding Organization | China Geology Survey ; National Natural Science Foundation of China |
| Publisher | WILEY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/26776 |
| Collection | 中国科学院水利部成都山地灾害与环境研究所 |
| Corresponding Author | Tang, Xian-Chun |
| Affiliation | 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 |
| Recommended Citation 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. |
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| gj.3564.pdf（2179KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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