中国近海沿岸泥的地球化学特征及其指示意义  

Geochemistry of muds along the coast of China and their significance

作　　者：赵一阳[1] 鄢明才[2] 李安春[1] 高抒[1,3] 3贾建军 

机构地区：[1]中国科学院海洋研究所 [2]国土资源部地球物理与地球化学勘查研究所 [3]南京大学海岸与海岛开发教育重点实验室,江苏南京210093

出　　处：《中国地质》2002年第2期181-185,共5页Geology in China

基　　金：国家重点基础研究发展规划项目(G20000467)资助。

摘　　要：中国海域辽阔,分为渤海、黄海、东海和南海4个海区。各海区沿中国大陆均有呈斑块状或条带状的泥质沉积分布。选取各沿岸泥的代表性样品,采用先进的XRF和ICP-MS等方法,测定了K、Li、Rb、Cs、Mg、Ca、Sr、Ba、Al、Fe、Ti、Be、Nb、Ta、W、Sn、Bi、La、Ce、Th。元素的地球化学研究表明:渤海和黄海、东海、南海沿岸泥的地球化学特征分别与黄河、长江、珠江沉积物的地球化学特征一致,显示了元素的物源效应;从渤海到南海,由于气候的变化使沿岸泥中某些元素有所流失或富集,显示了元素的气候效应;中国沿岸泥元素的丰度相对接近中国大陆沉积物的丰度,而异于西太平洋褐色粘土和深海粘土的丰度,显示了元素的亲陆性。Four sea areas may be distinguished in China;they are the Bohai Sea,Yellow Sea,East China Sea and South China Sea.Muddy sediments are distributed as patches or bands along the continent of Chi-na in the four sea areas.Representative samples of muds were taken from their coasts and they were ana-lyzed by XRF and ICP-Ms methods for K,Li ,Rb ,Sc,Mg ,Ca ,Sr,Ba ,Al ,Fe,Ti ,Be ,Nb ,Ta ,W,Sn,Bi ,La,Ce and Th.The element geochemistry indicates that the geochemical characteristics of the muds along the coasts of the Bohai Sea and Yellow Sea,East China Sea and South China Sea are consistent with those of the sediments of the Yellow River,Yangtze River and Pearl River respectively,showing the material source effect of the elements.From the Bohai Sea to South China Sea,some ele-ments in the coastal muds lose or are enriched more or less owing to the climatic change,showing the climatic effect of the elements.The element abundances in the muds along the coast of China are close to those in sediments in the continent of China but different from those of brown clays and abyssal clays in the western Pacific Ocean,showing the continental affinity of the elements.

关 键 词：泥质沉积 元素地球化学 中国近海 物源效应 气候效应 亲性性 

分 类 号：P737[天文地球—海洋地质]