| 东海外陆架晚第四纪沉积物的稀土元素组成及物源示踪 |
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| 关键词:rare earth elements Late Quaternary source tracing outer shelf of the East China Sea |
| 基金项目:国家自然科学基金项目(编号: 41206053);国土资源大调查项目(编号: 1212010611301) |
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| 摘要: |
| Distribution of Rare Earth Elements in Late Quaternary Sediments on the Outer Shelf of the East China Sea and Their Source Tracing |
| The sediment samples collected from Core SFK-1 in the depression area of Xihu on the outer shelf of the East China Sea were measured for rare earth elements (REE) by using ICP-MS with the purpose of studying the indicator significance of REE geochemical information for the stratigraphic division and provenance analysis of the outer shelf sediments in the East China Sea. According to the variation of REE content and ratio, the sediments from Core SFK-1 can be divided into eight geochemical layers, suggesting that geochemical characteristics of REE have good indicator significance for stratigraphic division. The results show that the sediments in Core SFK-1 were mainly derived from the Yangtze River and the Yellow River. The sediments above the depth of 28.00 m in upper Core SFK-I mainly belong to the Yangtze River source; the sediments between 28.00~47.20 m in middle Core SFK-1 was mainly derived from the Yellow River, and the sediments between 47.20 and 82.90 m at the bottom of Core SFK-1 was mainly derived from the Yangtze River. It is concluded that the Yangtze River has been playing a main role in the continental shelf of East China Sea since early Late Pleistocene and the Yellow River started to influence the continental shelf sedimentation of the East China Sea at the late stage of Late Pleistocene． |
| LAN Xian-hong,ZHANG Zhi-xun,WANG Zhong-bo,CHEN Xiao-hui.2014.Distribution of Rare Earth Elements in Late Quaternary Sediments on the Outer Shelf of the East China Sea and Their Source Tracing[J].Acta Geoscientica Sinica,35(3):305-313. |
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