可可西里地区湖泊演化

THE LAKE EVOLUTION IN KEKEXILI REGION

通过层序地层学和同位素年代学的研究表明，自32000aB．P．以来可可西里地区湖泊盆地至少经历了七次湖泊大水期。利用水体离子域聚类分析和综合分析，确定了湖泊演化过程中的阶段性和方向性，阐明了区内湖泊在其耗散结构系统中的时空位置，并指出离子域和物质流的发展趋向，用地球场效应关系建立了可可西里地区湖泊的演化模型。

According to the study on the sequence stratigraphy and isotope chronology of lakes,the lake basin in Kekexili region have at least underwent 7 great lake water stages since 32 ka B. P. The 7 stages were corresponding to the relative wet-warm climatic environment in lake evolution, and the interwater stages were corresponding to the dry-cold climatic environ ment. The cluster analysis of water body ion domain, evolution channel of natural water un saturated flow along Cl ion domain, SO4 ion domain and CO3 ion domain, are coupled with the precipitate fashion of chloride sulphate and carbonate types of water body saturated flow in Kekexili region. Through a cornprehensive analysis, the stages and trends of the lake evo lution are determined, which can be used for proving the temporal and spatial positions of lake water in Kekexili region, indicating the development trend of anion and cation domains and suhstance flow. The lake evolution pattern for Kekexili region is built by using the earth's field effect relation.