元素的聚散取决于其自身原子结构（内因）和地质作用环境（外因）两方面的因素，地球化学元素基因谱曲线就是地球化学系统对地质成矿作用的响应结果。以内蒙古大兴安岭中南段铜锡多金属成矿区（带）为研究区，通过1∶20万地球化学水系沉积物测量数据的处理分析，简述了地球化学元素基因谱曲线的构造与生成，重点探讨了水系沉积物测量数据构成的元素准基因谱曲线所包含的时空结构、关联结构等元素序结构信息，以及它们所包含的重要地质意义。通过对研究区地球化学填图元素准基因谱曲线的综合分析，指出两次叠加成矿作用造就了该地区中大型多金属矿床的形成，为该地区进一步地质找矿指明了基本方向。%Element concentration and dispersion are decided by atom structure of the element( internal cause) and geological process set⁃ting( external cause) . Gene profile curve of geochemical elements is geochemical response result of the geochemical system to geological ore formation. The copper and tin polymetallic belt of the central⁃south Da Hinggan Mountains in Inner Mongolia was selected as the study area. The 1∶ 200 000 stream sediment survey data were processed and analyzed. Based on the result, this paper discusses the structure and the generation of the gene profile curve of geochemical elements. The elements sequence structure information contained in the quasi gene profile curve of geochemical elements generated from stream sediment survey data, such as space⁃time structure and correlation structure, and its important geological significance are discussed in detail. Based on an integrated analysis of quasi⁃gene profile curve of the geochemical elements in the study area, the authors point out that the superposition of two epochs of mineralization resulted in the for⁃mation of large-and medium⁃sized polymetallic deposits. This conclusion indicates the orientation for further geological prospecting in this area.
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