| Increasing terrigenous sediment supply from Taiwan to the southern Okinawa Trough over the last 3000 years evidenced by Sr-Nd isotopes and geochemistry | |
Hu, Siyi1,2 ; Zeng, Zhigang1,2,3,4; Fang, Xue1,2; Yin, Xuebo1; Chen, Zuxing1; Li, Xiaohui1; Zhu, Bowen1,2; Qi, Haiyan1
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| 2020-08-01 | |
| 发表期刊 | SEDIMENTARY GEOLOGY
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| ISSN | 0037-0738 |
| 卷号 | 406页码:14 |
| 通讯作者 | Zeng, Zhigang([email protected]) |
| 摘要 | High-resolution sedimentary records reveal the patterns of weathering and erosion in response to climate change, environmental variability, and human activity. Here, we present major and trace element data, Sr-Nd isotopic compositions, and mass accumulation rates (MARs) for the silidclastic sediment fraction of a relatively high-resolution sedimentary archive from the southern Okinawa Trough, East China Sea. We reveal the sedimentary source-to-sink processes and the physical erosion and chemical weathering history of Taiwan. The Sr-Nd isotopic data indicate that sediments were mainly sourced from northeastern and western Taiwan rivers and thus, the sedimentary records reflect the weathering and erosion conditions in this source region. Volcanic rocks, aeolian dust, and terrigenous sediment from rivers in mainland China and eastern Taiwan have not significantly contributed to the deposits in the southern Okinawa Trough since ca. 3000 cal yr BP. Multiple indices, including the chemical index of alteration (CIA), K/Al, alpha(Al)(K), Ti/Na, and K/Na, are used to identify variations in the intensity of regional-scale chemical weathering. The strength of the sediment input is estimated using the MAR of the siliciclastic (MAR(siliciclastic)) and the MAR of Ti (MAR(T)(i)). The results suggest that the bedrock of small mountainous river systems in Taiwan has experienced relatively stable and moderate chemical alteration and that the terrigenous sediment supply from Taiwan to the southern Okinawa Trough has progressively increased since ca. 3000 cal yr BP. A comparison of these data with climate and human activity indicates that the increased input of terrigenous sediment was closely related to an intensification of rainfall in Taiwan over the last 3000 years. After ca.1500 cal yr BP, a sustained increase in the terrigenous sediment input likely to be attributed to the combined effects of intensified heavy rainfall and human activity, occurred. Intense physical erosion in Taiwan's river basins has exerted a long-term constraint on chemical weathering intensity. The lack of evident link between silicate weathering and climate forcing in these catchments suggests that paleoclimate reconstruction based on sedimentary geochemical records offshore of Taiwan rivers requires careful consideration. (C) 2020 Elsevier B.V. All rights reserved. |
| 关键词 | Sr-Nd isotopes Marine sediment provenance Physical erosion Chemical weathering Human activity |
| DOI | 10.1016/j.sedgeo.2020.105725 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[91958213]; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-02]; International Partnership Program of Chinese Academy of Sciences[133137KYSB20170003]; National Special Fund for the 13th Five Year Plan of COMRA[DYI35-G2-01-02]; Special Fund for the Taishan Scholar Project of Shandong Province[ts201511061]; National Basic Research Program of China[2013CB429700]; China Postdoctoral Science Foundation[2020M672018] |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| WOS记录号 | WOS:000568162600012 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/168741 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Zeng, Zhigang |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 通讯作者单位 | 中国科学院海洋研究所; 中国科学院海洋大科学研究中心 |
| 推荐引用方式 GB/T 7714 | Hu, Siyi,Zeng, Zhigang,Fang, Xue,et al. Increasing terrigenous sediment supply from Taiwan to the southern Okinawa Trough over the last 3000 years evidenced by Sr-Nd isotopes and geochemistry[J]. SEDIMENTARY GEOLOGY,2020,406:14. |
| APA | Hu, Siyi.,Zeng, Zhigang.,Fang, Xue.,Yin, Xuebo.,Chen, Zuxing.,...&Qi, Haiyan.(2020).Increasing terrigenous sediment supply from Taiwan to the southern Okinawa Trough over the last 3000 years evidenced by Sr-Nd isotopes and geochemistry.SEDIMENTARY GEOLOGY,406,14. |
| MLA | Hu, Siyi,et al."Increasing terrigenous sediment supply from Taiwan to the southern Okinawa Trough over the last 3000 years evidenced by Sr-Nd isotopes and geochemistry".SEDIMENTARY GEOLOGY 406(2020):14. |
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