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黄河是中国的第二大河流,输沙量居世界之冠(平均年输沙量约12亿吨),黄河的频繁改道和大量泥沙入海促成了黄河三角洲的迅速形成。测定黄河口外海区近代沉积速率和沉积通量对沉积动力学的研究及黄河三角洲的治理与开发有重要意义。近年来,国内外学者利用~(210)Pb法广泛测定了江、河、湖泊和浅海陆架的沉积速率,取得了可喜的成果。然而,测定象黄河口外高速沉积环境海域的近代沉积速率是一个新的尝试。本文利用~(210)Pb法测定了黄河三角洲海域4个岩芯~(210)Pb的放射性强度,结果报告于后。
The Yellow River is the second largest river in China with the largest amount of sediment transport in the world (average annual sediment discharge of about 1.2 billion tons). The Yellow River’s frequent diversions and large amounts of sediment into the sea contributed to the rapid formation of the Yellow River Delta. It is of great significance to study the sedimentation kinetics and the management and development of the Yellow River Delta. In recent years, domestic and foreign scholars widely used the ~ (210) Pb method to determine the sedimentation rate of the river, river, lake and shallow shelf, and achieved gratifying results. However, it is a new attempt to determine the recent sedimentation rate in the sedimentary environment surrounding the Yellow River estuary. In this paper, the ~ (210) Pb method was used to determine the radioactivity of ~ (210) Pb from four cores in the Yellow River Delta. The results are reported later.