地球化学研究方法在钾盐找矿中的应用

Application of Geochemical Research Method to the Prospecting of Potash Deposit

钾盐是我国的紧缺矿产资源之一,寻找钾盐资源尤其是古钾盐矿床对于我国具有重要的意义。但是由于钾盐易溶,在地表很少有成矿标志,所以加大了找矿的难度。通过论述地球化学方法在蒸发岩研究中的应用情况,指出地球化学方法在寻找钾盐的过程中有着重要的应用,其应用可以概括为:可以判断成盐古卤水的蒸发浓缩阶段和矿床的成矿阶段、揭示盐类矿床的物质来源及其沉积环境、划分蒸发岩的沉积旋回和重现古盐湖的演化过程以及分析成盐盆地的封闭蒸发条件和氧化还原性等。云南兰坪—思茅盆地是我国最具有找钾希望的区域,研究盆地内蒸发岩的地球化学特征对于在盆地内寻找钾盐矿床具有重要的指示意义。

Potash is one of serious shortage resources in China, it is of important significance for China to seek potash resource especially ancient potash deposit. But because sylvite is easily dissolve and there are few signs of metallogenic on the surface,it is more difficulty to the prospecting of potash deposit. This paper indicates that geochemistry method has important application to the prospecting of potash deposit by discussing the geochemical study methods in the application research of evaporite, its application can be summarized as that： to judge the stage of the deposit, to reveal the evaporation concentration stage the genesis and the salt-forming of ancient brine and the metallogenic environment of the potash deposit, to divide the sedimentary cycle of evaporite and recreate the evolution of ancient salt lake and analyze the closed evaporation condition and oxidation and reducing of the salt-forming basin etc. Yunnan Lanping- Simao Basin is the most prospect area for finding potash and studying the geochemical characteristics of the evaporite has important instructional significance in lookin~ for potash denosit in the basin.