大比例尺地球化学勘查技术在隐伏矿找矿实践中的应用——以内蒙古乌拉特后旗查干德尔斯大型钼矿为例

The application of large-scale geochemical prospecting technique to the prospecting for concealed ore deposits: A case study of the Chagandeersi large molybdenum deposit in Urad Rear Banner,Inner Mongolia

根据地球化学1∶20万主成矿元素Mo的综合异常,采用1∶1万地质填图和1∶2.5万沟系土壤测量方法,快速圈定了Mo找矿靶区。在综合研究的基础上,确定找矿有利部位,经钻探验证,发现内蒙古乌拉特后旗查干德尔斯大型隐伏钼矿,证明了大比例尺沟系土壤地球化学测量对该区寻找隐伏矿床具有重要作用。笔者系统总结了该类矿床的地质地球化学找矿标志,为寻找隐伏矿床提供了参考。

In this study,the molybdenum prospecting target was delineated quickly by 1 ∶ 10 000 geological mapping and 1 ∶ 25 000 soil geochemical survey in the drainage system on the basis of optimizing 1 ∶ 200 000 comprehensive anomaly of Mo-based ore-forming elements. The favorable areas for ore prospecting were delineated on the basis of comprehensive research. And then,the Chagandeersi large molybdenum deposit was discovered by exploratory drilling in Urad Rear Banner,Inner Mongolia. The result has proved that large-scale soil geochemical survey in the drainage system is crucial in search for ore deposits. The geological-geochemical prospecting criteria of this kind of deposits are summarized in this paper,and this provides reference in search for concealed ore deposits.