柴达木盆地盐类资源成矿构造环境及成矿预测

运用区域地质资料和地球重力测量资料的分析成果,对柴达木盆地新生代地层沉积建造的空间位置和基本构造形式进行了讨论;用实验对比和地质概化的方法,建立了新生代盆地的构造边界和构造系统;用地球动力成矿和层位耦合成矿的规律说明,新生代盆地内部存在共轭成矿作用,并可用来预测成盐成矿地段和筛选寻矿找矿靶区,为中国大陆盆地的盐类矿产资源的开发和研究提供依据。根据柴达木盆地基底构造的分析,在第四纪成矿作用的基础上,在新生代地层深部寻找新的盐类矿床是大有前景的。依据成矿环境条件,圈定出5个盐类矿床的成矿构造带,是今后找矿勘探的靶区及成矿远景地带。

Forecast of deposit formation and structural environment for the deposit formation of salt resources in Qaidam Basin

The spatial position of sedimentary formation and the basic form of structure in Qaid-am Basin related to Cenozoic stratum are studied using analytical results of regional geolog ical and the earth gravity survey data.The structural boundary and structural system of the Cenozoic basin are set up with the aid of experimental contrast and geological generalization method.The law of coupling deposit formation and dynamic deposit formation of the earth evidence the exis-tence of conjugate deposit formation action in the interior of the Cenozoic basin.The work can be used to predict salt and deposit formation region and screen and select target section of recon-naissance so as to provide basis for the developing and researching mineral resources of salts in the continental basin of China.The analysis of basement structure of the Qaidam Basin as well as Quaternary action of deposit formation indicates there are great prospect for prospecting new salt deposits at the depth of the Cenozoic stratum.By the condition of deposit formation environment,structural belts of deposit formation of five types of salts are defined which can serve as region for future prospecting and promising deposit formation section.