岩石化学元素丰度在地球化学块体研究中的意义

THE SIGNIFICANCE OF ELEMENT ABUNDANCES OF ROCKS IN THE STUDY OF GEOCHEMICAL BLOCKS

以Au、Ag、Cu、Pb、Zn、Sb、Hg、W、Sn、Mo、U、Cr、Ni、Co等14种成矿元素为例,利用中国东部不同构造单元的出露地壳和不同类型岩石的元素丰度阐明其在水系沉积物地球化学块体划分与研究中的意义。利用岩石元素丰度对地球化学块体进行研究,既可查明不同地球化学景观区水系沉积物地球化学块体的成因,又可为地球化学块体的研究对比提供条件。因此,应建立不同大地构造单元或不同地球化学景观区的岩石元素丰度并加强其与水系沉积物元素含量的对应关系的研究,这将会对地球化学块体的划分与推断解释提供重要的更加合理的依据。

The abundances of 14 oreforming elements such as Au, Ag, Cu, Pb, Zn, Sb, Hg, W, Sn, Mo, U, Cr, Ni and Co in exposed crust and various rocks within different geochemical landscapes have obvious significance in the division and study of geochemical blocks of stream sediments. The application of abundances of chemical elements in rocks to the study of geochemical blocks can not only find out the geneses of geochemical blocks of stream sediments in different landscape regions but also provide the comparison conditions for the study of geochemical blocks. Therefore, the abundances of chemical elements in different tectonic units or geochemical landscape regions should be set up, and the study of their relationship with abundances of chemical elements in rocks and stream sediments should be strengthened so as to provide important and more rational evidence for the division and interpretation of geochemical blocks.