| 渤海东部晚更新世以来的沉积物地球化学特征 |
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| 引用本文： | 蓝先洪,秦亚超,王中波,陈晓辉,密蓓蓓,黄龙.渤海东部晚更新世以来的沉积物地球化学特征[J].沉积学报,2016,34(5):892-901. |
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| 作者姓名： | 蓝先洪 秦亚超 王中波 陈晓辉 密蓓蓓 黄龙 |
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| 作者单位： | 1.国土资源部海洋环境与油气地质重点实验室 青岛海洋地质研究所 山东青岛 266071; |
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| 基金项目： | 国家自然科学基金(41330964;41406077)，国土资源部海洋区域地质调查项目(GZH200800501 |
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| 摘 要： | 为探讨渤海东部晚更新世以来的元素地球化学特征及控制因素，对渤海东部DLC70-1孔157个沉积物样品进行了化学成分、粒度及测年分析。结果表明，晚更新世以来研究区沉积物的物质来源与沉积环境较为稳定；根据DLC70-1孔沉积物地球化学特征，钻孔岩芯可划分为6层，反映了末次间冰期（暖期）晚期以来渤海东部沉积物物源的变化以及海面波动。Al2O3、MgO、TFe2O3、MnO、TiO2、Cu、Zn、Pb、Cr和Rb等元素与细粒沉积物呈正相关，SiO2、Na2O与粗粒沉积物呈正相关，K2O、Sr和Ba分布与沉积物粒度无明显正或负的相关性；R-型因子分析得出三种主要组合类型，以Mg、Sr和Ba为代表，分别对应陆源细粒物质输入与黄河物质、海河物质和滦河物质的影响。运用Ba/Al2O3与Sr/Al2O3、MgO/Al2O3与K2O/Al2O3离散图分析了DLC70-1孔的物质来源，结果表明沉积物主要来源于黄河，该孔中上部32.30~49.00 m和9.30~23.20 m沉积物受到了滦河和海河物质的影响。
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| 关 键 词： | 渤海东部 地球化学 沉积物 晚更新世 |
| 收稿时间： | 2015-11-27 |
Geochemical Characteristics of Sediments in the Eastern Bohai Sea since Late Pleistocene |
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| LAN XianHong,QIN YaChao,WANG ZhongBo,CHEN XiaoHui,MI BeiBei,HUANG Long.Geochemical Characteristics of Sediments in the Eastern Bohai Sea since Late Pleistocene[J].Acta Sedimentologica Sinica,2016,34(5):892-901. |
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| Authors: | LAN XianHong QIN YaChao WANG ZhongBo CHEN XiaoHui MI BeiBei HUANG Long |
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| Institution: | 1.Key Laboratory of Marine Hydrocarbon Resource and Environmental Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao, Shandong 266071, China;2.Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong 266071, China |
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| Abstract: | 157 sediment samples were collected from Core DLC70-1 in the eastern Bohai Sea.These samples were analyzed for major and trace elements, grain size parameters, C14 dating and OSL dating with the purpose of studying the geochemical characteristics of elements and controlling factors in the eastern Bohai Sea since Late Pleistocene.The results show that sediment sources and depositional environments of the study area remained relatively stable since Late Pleistocene. According to the changing law of element contents, the sediments from Core DLC70-1 can be divided into six layers, reflecting the fluctuation of sea level and the change of sediment sources in Bohai Sea since the late of the last interglacial cycle (warm period).The Al2O3, MgO, TFe2O3, MnO, TiO2, Cu, Zn, Pb, Cr and Rb elements were positively correlated with the fine-grained sediments, and SiO2, Na2O was positively correlated with coarse-grained sediments. There was no significant positive or negative correlation between K2O, Sr and Ba distributions and grain size of sediment. Three groups representing respectively by Mg, Sr and Ba can be derived from R-model factor analysis, corresponding to the impact of the input of fine-grained terrigenous sediments and Yellow River sediment, Haihe River sediments, Luanhe River sediments. Combined with scatter diagram of Ba/Al2O3 vs. Sr/Al2O3, MgO/Al2O3 vs. K2O/Al2O3 were drawn to reveal the source of sediments from Core DLC70-1. The results suggest that the material sources of the core mainly come from the Yellow River, but the sediments in the upper-middle parts of the core were apparently influenced by materials from the Luanhe River and Haihe River. |
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| Keywords: | eastern Bohai Sea geochemistry sediment Late Pleistocene |
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