| Tectonic and paleoceanographic conditions during the formation of ferromanganese nodules from the northern South China Sea based on the high-resolution geochemistry, mineralogy and isotopes | |
| Zhong, Yi1,2,3,4; Liu, Qingsong2,7; Chen, Zhong1; Javier Gonzalez, Francisco5; Hein, James R.6; Zhang, Jian3; Zhong, Lifeng8 | |
| 2019-04-01 | |
| 发表期刊 | MARINE GEOLOGY
 |
| ISSN | 0025-3227 |
| 卷号 | 410页码:146-163 |
| 通讯作者 | Chen, Zhong(chzhsouth@scsio.ac.cn) |
| 摘要 | Deep-water ferromanganese (Fe-Mn) nodules cumulate trace elements from the underlying sediment pore-water and seawater during the concentric mineral layers' growth process over millions of years. They can record long-term tectonic movements and paleoceanographic changes. To systematically ascertain paleoceanographic evolution of the deep South China Sea (SCS) since the last 3.2 Ma, we comprehensively investigated microstructure, mineralogy, geochemical element concentrations as well as Sr, Nd and Pb isotopic compositions in the Fe-Mn nodules nearby the Dongsha Islands in the northern SCS. Results indicate that these deposits were formed in a continental marginal environment by a mixture of diagenetic and hydrogenetic processes. Overall, the studied nodules can be divided into three stages with different microstructures and chemical compositions, which indicate different formation environments. Stage la is the innermost and oldest layer with a porous mottled texture, and has the lowest Mn/Fe ratio, Cu, Ni and Zn, which implies comparatively high oxidization conditions. In contrast, the Mn mineralogy of Stage 2 shows conditions similar to those of buserite formed under less oxidative conditions. Between Stage la and 2, Stage 1b represents a mixture of Stage la and 2 and has in homogeneous growth structures. Based on the Nd and Sr isotopic composition of the detrital phases and Pb isotopes, three potential terrigenous source regions including South China, Luzon and Taiwan that discharge into the northern SCS from 3.2 Ma to 1.06 Ma. After 1.06 Ma, the terrigenous fraction in the Fe-Mn deposits on the northern slope of the SCS is a two end-members mixture of fluvial input from Taiwan Islands and eolian dusts from the Chinese loess. Our study indicates that SCS bottom water variation occurred at similar to 3.2 Ma, 2.1 Ma, and 1.06 Ma, respectively, which could be attributed to global cooling and the influence of Luzon arc-forearc uplift. |
| 关键词 | Paleoceanography Closure of gateway Pacific Deep Water Radiogenic isotopes Northern Hemisphere Glaciation Northern South China Sea |
| DOI | 10.1016/j.margeo.2018.12.006 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | State Key Laboratory of Marine Geology, Tongji University[MGK1826] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2018KG05] ; National Natural Science Foundation of China[41874078] ; National Natural Science Foundation of China[41806063] ; National Natural Science Foundation of China[43176057] ; National Natural Science Foundation of China[41676056] ; National Natural Science Foundation of China[41676056] ; National Natural Science Foundation of China[43176057] ; National Natural Science Foundation of China[41806063] ; National Natural Science Foundation of China[41874078] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2018KG05] ; State Key Laboratory of Marine Geology, Tongji University[MGK1826] |
| WOS研究方向 | Geology ; Oceanography |
| WOS类目 | Geosciences, Multidisciplinary ; Oceanography |
| WOS记录号 | WOS:000460716000012 |
| 出版者 | ELSEVIER SCIENCE BV |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/155304 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Chen, Zhong |
| 作者单位 | 1.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China 2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 5.Geol Survey Spain IGME, Marine Geol Dv, Madrid 28003, Spain 6.US Geol Survey, 2885 Mission St, Santa Cruz, CA 95060 USA 7.Qingdao Natl Oceanog Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 8.Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510006, Guangdong, 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 |
| 推荐引用方式 GB/T 7714 | Zhong, Yi,Liu, Qingsong,Chen, Zhong,et al. Tectonic and paleoceanographic conditions during the formation of ferromanganese nodules from the northern South China Sea based on the high-resolution geochemistry, mineralogy and isotopes[J]. MARINE GEOLOGY,2019,410:146-163. |
| APA | Zhong, Yi.,Liu, Qingsong.,Chen, Zhong.,Javier Gonzalez, Francisco.,Hein, James R..,...&Zhong, Lifeng.(2019).Tectonic and paleoceanographic conditions during the formation of ferromanganese nodules from the northern South China Sea based on the high-resolution geochemistry, mineralogy and isotopes.MARINE GEOLOGY,410,146-163. |
| MLA | Zhong, Yi,et al."Tectonic and paleoceanographic conditions during the formation of ferromanganese nodules from the northern South China Sea based on the high-resolution geochemistry, mineralogy and isotopes".MARINE GEOLOGY 410(2019):146-163. |
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