| 渤海东部与黄海北部表层沉积物的元素地球化学记录 |
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| 关键词:eastern Bohai Sea northern Yellow Sea major elements geochemistry provenance |
| 基金项目:Element Geochemistry Records of Surface Sediments in the East of the Bohai Sea and the Northern Yellow Sea |
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| 摘要: |
| Element Geochemistry Records of Surface Sediments in the East of the Bohai Sea and the Northern Yellow Sea |
| The major element abundances of the sediment samples collected from 138 stations were analyzed with the purpose of studying the distribution of the major elements in the sediments and their relations with the provenance in the east part of the Bohai Sea and the northern Yellow Sea. The Al2O3, MgO, Na2O and TFe2O3 have similar distribution patterns, whereas SiO2 is negatively correlated with these oxides in the east part of Bohai Sea and the northern Yellow Sea. The Al2O3, MgO, TFe2O3, TiO2 and Na2O elements are positively correlated with the fine-grained sediments, and SiO2 is positively correlated with coarse-grained sediments; there is no significant positive or negative correlation between CaO, CaCO3, MnO and K2O distribution and grain sizes of sediments; the K2O distribution in the eastern part of the North Yellow Sea reflects the impact of the Yalu River material. R-mode cluster analysis indicates three combinations of types that are represented by MgO, CaO and K2O, MnO, respectively, reflecting the input of terrigenous fine-grained material, the impact of the Yellow River and the Yalu River substances, and marine authigenesis, respectively. According to the Q-mode cluster analysis, the geochemical characteristics of the investigation area are divided into four different sediment geochemical subareas. In addition, the authors also obtained the sediment transport trends and routes in theⅠ, Ⅱ, Ⅲ and Ⅳ regions. K2O/CaO ratios show that the effect of the Yellow River substances is gradually weakened from the south to the north and from the west to the east, the sediments in the southwest of the study area and in the middle-west parts of the North Yellow are strongly impacted by the Yellow River substances, and the sediments in the east of the North Yellow Sea are more seriously affected by the Yalu River substances. |
| LAN Xian-hong,LI Ri-hui,ZHANG Zhi-xun,WANG Zhong-bo,QIN Ya-chao,CHEN Xiao-hui.2015.Element Geochemistry Records of Surface Sediments in the East of the Bohai Sea and the Northern Yellow Sea[J].Acta Geoscientica Sinica,36(6):718-728. |
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