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| DOI码： | 10.1007/s11434-012-5311-z |
| 发表刊物： | Chinese Science Bulletin |
| 摘要： | This study examines the effects of hydrologic sorting and mixing of sources on the Sr-Nd isotopic compositions of suspended sediments at different water depths. The samples were collected from three layers (surface, middle and bottom) at Datong hydrological station of Yangtze River during the flood season of 2010. Our results show that, 87Sr/86Sr values decrease from surface to bottom, ranging from 0.730332 to 0.720857. ɛ Nd(0) values range from −14.75 to −10.09, with surface sediments being the most negative. The isotope composition at the middle layer can best represent the mean isotopic composition of the total suspended sediments transported by a river. It is believed that the stratification of Sr-Nd isotope is attributable to mixing of sediments from different sources due to hydrological sorting. Sediments from the upper stream are found to be coarser, and tend to contribute more to the lower water column. Although Sr-Nd isotope is a well acknowledged tool to trace sediment provenance, the current study suggests that the grain size of the samples and the sampling locations should be taken into consideration when applying this method to provenance study. |
| 合写作者： | Wu Weihua, Wang Ping, Chen Yuliang, Wei Xiaochun |
| 第一作者： | Luo Chao |
| 论文类型： | 期刊文章 |
| 通讯作者： | Zheng Hongbo |
| 卷号： | 57 |
| 期号： | 34 |
| 页面范围： | 4482–4490 |
| ISSN号： | 1001-6538 |
| 发表时间： | 2012-12-01 |
