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利用东海陆架泥质沉积区和周围砂质沉积区的表层沉积物元素含量和海水悬浮沉积物总量分析资料 ,对泥质区的沉积地球化学进行了比较研究。结果表明东海不同泥质区的沉积地球化学过程很不相同。浙江近岸泥质区沉积物元素以Fe、Mn、Zn的含量高 ,Na、Sr、Al、Ca的含量低为特征 ,其地球化学特征与长江沉积物非常一致。近岸泥质区的沉积物基本来源于长江输入海的沉积物 ,在台湾暖流的作用下沉积在浙江沿岸。远岸济州岛西南泥质区沉积物以Na、Sr的高含量 ,较高的Al、Ca含量和低的Fe、Mn、Zn含量为特征 ,其地球化学特征与黄河源沉积物有好的相关性 ,但有一定的混合源性质 ,该泥质区的沉积物主要来源于黄河源的细颗粒沉积物 ,由黄海沿岸流搬运到该区并沉积下来。沉积物在搬运沉积过程中 ,元素粒度分异作用明显。东海陆架泥质区沉积地球化学过程的控制性影响因子是东海环流系统和物源 ,其中台湾暖流对东海陆架远岸和近岸泥质区的沉积地球化学分区具有关键作用
The sedimentary geochemistry of the shale area is comparatively studied by using the elemental content of surface sediments and the total amount of suspended sediment in the sediments of the East China Sea shelf and surrounding sandy sediments. The results show that the sedimentary geochemical processes in different muddy areas of the East China Sea are very different. Sediment elements in the coastal muddy areas of Zhejiang are characterized by high Fe, Mn and Zn contents and low Na, Sr, Al and Ca contents. Their geochemical characteristics are very consistent with those of the Yangtze River sediments. The deposits in the coastal muddy areas are basically derived from the sediments transported into the sea by the Yangtze River and are deposited on the coast of Zhejiang Province under the influence of Taiwan’s warm current. The sediments in the southwestern part of Jeju Island of the Far East are characterized by high contents of Na and Sr, high contents of Al and Ca and low content of Fe, Mn and Zn, and their geochemical characteristics are well correlated with sediments from the Yellow River However, there is a certain mixed source nature. The sediments of this muddy area are mainly derived from fine sediments of the Yellow River source and transported to the area by the Yellow Sea coast flow and deposited. Sediment transport sedimentation process, the elemental grain size differentiation obvious. The controlling factor of sedimentary geochemical process in the continental shelf shale region of the East China Sea is the circulation system and source of the East China Sea. The warm current in Taiwan plays a key role in the sedimentary geochemical zoning of the continental shelf in the East China Sea shelf.