陆源碎屑岩地球化学在盆地分析中的应用  

APPLICATION OF SEDIMENTARY GEOCHEMISTRY OF TERRIGENOUS CLASTIC ROCK TO BASIN ANALYSIS

作　　者：邵磊[1] 刘志伟[1] 朱伟林[1] 

机构地区：[1]同济大学海洋地质教育部重点实验室,上海200092

出　　处：《地学前缘》2000年第3期297-304,共8页Earth Science Frontiers

基　　金：国家自然科学基金重大资助项目!(49999560);教育部高等学校骨干教师资助计划资助

摘　　要：按地球化学成分的变化特点 ,吐—哈盆地砂岩样品以二叠纪、三叠—侏罗纪、白垩—第三纪为单位组成三个组 ,分别代表盆地几个相对稳定的发育时期。在这三个组之间岩石化学成分存在较大的突变或跳跃 ,则是盆地南侧发生的几次板块碰撞拼合作用对本区产生的影响。对渤海湾盆地泥岩地球化学分析表明 ,渤海湾盆地海域内各次级凹陷的沉积物源区各自不同、相互独立 ;但在盆地不同地区 ,沉积物源区母岩地层时代有随时间推移发生改变的现象。上述研究表明 ,陆源沉积物地球化学研究在沉积盆地分析中具有其独特的优势 ,可以揭示沉积物成分中所包含的更为细微的信息 。The sandstone samples from the Turpan basin can be subdivided into the following three groups according to geochemical data:the Permian, the Triassic and Jurassic, and the Cretaceous and Tertiary. These groups indicate three stable evolutional stages of the basin. There are two large discontinuities among them, reflecting the influence of several collisions and convergence occurred on the southern of the Eurasian Plate in the area. In the Bohai Gulf basin mudstone geochemistry shows that the source areas of sediments in different stages are very different,and they changed with time. These examples indicate that sedimentary geochemistry has unique advantage in sedimentary basin analysis, which can reveal delicate information contained in the sediments. Therefore, it is one of the best tools in the study of sedimentary basin evolution.

关 键 词：陆源碎屑岩 地球化学 沉积物源分析 盆地构造 

分 类 号：P588.21[天文地球—岩石学] P544.4[天文地球—地质学]