| Clay mineral and grain size studies of sediment provenances and paleoenvironment evolution in the middle Okinawa Trough since 17 ka | |
| Wang, Jiaze1,2,3; Li, Anchun1; Xu, Kehui3,4; Zheng, Xufeng1; Huang, Jie1 | |
| 2015-08-01 | |
| 发表期刊 | MARINE GEOLOGY
 |
| 卷号 | 366页码:49-61 |
| 文章类型 | Article |
| 摘要 | Okinawa Trough receives a large amount of fluvial sediment transported by complex oceanographic circulations, and is an ideal location for the study of paleoceanography and paleoenvironment changes. However, our knowledge of the sediment provenance and paleoenvironment evolution in the Trough during the past 17 ka is still limited. Based on high-resolution grain size, clay minerals and AMS C-14 data of the Core OKI04, we present new evidences of the provenances and paleoenvironment evolution in the middle Okinawa Trough during the last 17 ka. Our results indicate that clay-sized terrigenous sediment deposited in the middle Okinawa Trough is mainly from those rivers flowing into East China Sea and Yellow Sea (e.g., Yangtze and Yellow Rivers) and Taiwanese Rivers. Their contributions varied greatly in space and time during the past 17 ka. From 16.5 to 13.8 ka, sediment was mainly derived from the Yangtze and Yellow Rivers, with little contribution from Taiwan. From 13.8 to 5.4 ka, the contributions from the Yangtze and Yellow Rivers oscillated multiple times: low in 13.8-11.6 ka, high in 11.6-7.6 ka, and back to low in 7.6-5.4 ka, whereas the pattern of Taiwanese contribution was opposite. After 5.4 ka when the sea level was high and shoreline was far away from the Okinawa Trough, the Yangtze River and eastern Taiwanese Rivers became the main provenances. The contribution from the Yellow River decreased, which is probably because Yellow River mouth was far away from the middle Trough. Sediment grain size data show that two environmentally sensitive populations are 71-7 mu m and 7-0.5 mu m. The variation of the populations' mean grain size and content shows that the strength of Kuroshio Current was weak during 16.5-11.6 ka, and became strong in 11.6-5.4 ka, in which Tsushima Warm Current and Yellow Sea Warm Current formed around 8.5 and 6.5 ka, respectively. The strength of Kuroshio Current decreased in 5.4 ka and increased since 3.2 ka. Based on clay mineralogical analysis, we find that the kaolinite/chlorite could be used as a new effective indicator for the East Asian Winter Monsoon's evolution in the Trough since 17 ka. (C) 2015 Elsevier B.V. All rights reserved. |
| 关键词 | Grain Size Clay Minerals Sediment Provenance Kuroshio Current East Asian Winter Monsoon Okinawa Trough |
| DOI | 10.1016/j.margeo.2015.04.007 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000356546100004 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/33083 |
| 专题 | 海洋地质与环境重点实验室 |
| 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.Louisiana State Univ, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA 4.Louisiana State Univ, Inst Coastal Studies, Baton Rouge, LA 70803 USA |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Wang, Jiaze,Li, Anchun,Xu, Kehui,et al. Clay mineral and grain size studies of sediment provenances and paleoenvironment evolution in the middle Okinawa Trough since 17 ka[J]. MARINE GEOLOGY,2015,366:49-61. |
| APA | Wang, Jiaze,Li, Anchun,Xu, Kehui,Zheng, Xufeng,&Huang, Jie.(2015).Clay mineral and grain size studies of sediment provenances and paleoenvironment evolution in the middle Okinawa Trough since 17 ka.MARINE GEOLOGY,366,49-61. |
| MLA | Wang, Jiaze,et al."Clay mineral and grain size studies of sediment provenances and paleoenvironment evolution in the middle Okinawa Trough since 17 ka".MARINE GEOLOGY 366(2015):49-61. |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Clay mineral and gra（2688KB） | 期刊论文 | 出版稿 | 限制开放 | ODC PDDL | 浏览 | |
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