| Rare earth element geochemistry of sediments from the southern Okinawa Trough since 3 ka: Implications for river-sea processes and sediment source | |
| Hu, Siyi1,3; Zeng, Zhigang1,2,3,4; Fang, Xue1,3; Zhu, Bowen1,3; Li, Xiaohui1; Chen, Zuxing1 | |
| 2019 | |
| Source Publication | OPEN GEOSCIENCES
 |
| ISSN | 2391-5447 |
| Volume | 11Issue:1Pages:929-947 |
| Corresponding Author | Zeng, Zhigang(zgzeng@ms.qdio.ac.cn) |
| Abstract | The sediment sources in the southern Okinawa trough (SOT) are still controversial and few studies have focused on the effects of transport processes on the elemental composition of initial terrigenous materials. Here we present rare earth element (REE) and trace element data on siliciclastic sediments from C-14 age-dated Core S3, which was collected from the SOT, to provide reliable evidence for illustrating the modified effects of marine environments on terrigenous sediments deposited at different stages and exposing changes in sediment source over the past 3 ka. Compared with bulk sediments, the siliciclastic sediments in S3 have more variable REE fractionation parameters and lower middle REE (MREE) contents. Our REE data indicate that during river-sea processes, MREE-enriched fractions such as Fe-Mn oxides and carbonate were added to the original terrigenous sediments before deposition, weakening the degree of REE fractionation in the initial sediments; thus, care should be taken when using REE data from bulk samples to decipher source changes. The temporal changes in sediment source in S3 can be broadly identified based on the REE fractionation parameters of the residual fractions, and the results are largely consistent with the findings obtained by heavy mineral examinations. Units 1 and 3 are dominated by reworked shelf sediments of Changjiang origin, while the proportion of Taiwan-derived sediment is notably higher in Units 2 and 4. The sediment flux of Taiwan origin in the SOT was much smaller than previously thought. Huanghe-derived sediments and volcanic materials did not contribute significantly to the late Holocene sedimentation in the SOT. The large variations in sediment sources in S3 were possibly caused by changes in transport patterns driven by time-dependent changes in oceanic currents. |
| Keyword | Rare earth element Sediment source Southern Okinawa Trough River-sea processes |
| DOI | 10.1515/geo-2019-0072 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Program of Shandong Province[ts201511061] ; National Basic Research Program of China[2013CB429700] ; National Natural Science Foundation of China[91958213] ; National Natural Science Foundation of China[41325021] ; AoShan Talents Program ; Qingdao National Laboratory for Marine Science and Technology[2015ASTP-0S17] ; Qingdao National Laboratory for Marine Science and Technology[2015ASKJ03] ; Qingdao National Laboratory for Marine Science and Technology[2016ASKJ13] ; Innovative Talent Promotion Program[2012RA2191] ; Scientific and Technological Innovation Project |
| WOS Research Area | Geology |
| WOS Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000507245200001 |
| Publisher | SCIENDO |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/164407 |
| Collection | 海洋地质与环境重点实验室 |
| Corresponding Author | Zeng, Zhigang |
| Affiliation | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China |
| First Author Affilication | Institute of Oceanology, Chinese Academy of Sciences |
| Corresponding Author Affilication | Institute of Oceanology, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Hu, Siyi,Zeng, Zhigang,Fang, Xue,et al. Rare earth element geochemistry of sediments from the southern Okinawa Trough since 3 ka: Implications for river-sea processes and sediment source[J]. OPEN GEOSCIENCES,2019,11(1):929-947. |
| APA | Hu, Siyi,Zeng, Zhigang,Fang, Xue,Zhu, Bowen,Li, Xiaohui,&Chen, Zuxing.(2019).Rare earth element geochemistry of sediments from the southern Okinawa Trough since 3 ka: Implications for river-sea processes and sediment source.OPEN GEOSCIENCES,11(1),929-947. |
| MLA | Hu, Siyi,et al."Rare earth element geochemistry of sediments from the southern Okinawa Trough since 3 ka: Implications for river-sea processes and sediment source".OPEN GEOSCIENCES 11.1(2019):929-947. |
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