烃气测量法在黄土覆盖区找矿中探索研究

Research on hydrocarbon method in the prospecting of the loess covered area

崤山中河银铅矿位于小秦岭成矿带,矿区大部分区段被黄土所覆盖,基于传统地球化学测量方法在黄土覆盖区找矿无效,而烃类气体具有穿透性强以及迁移距离远的特性,我们将有机烃气测量技术在该区开展了探索性的找矿预测可行性试验研究。通过对该矿区已知矿体、矿体周围围岩、矿体正上方和周围黄土等不同介质进行烃类组分含量特征以及异常展布特征分析,结合烃类组分微观组成结构对比分析,发现黄土中隐含深部找矿信息,显示了烃气测量方法在黄土覆盖区找矿的可行性,为这类特殊景观区今后找矿提供了地球化学技术支撑。

Xiaoshan Zhonghe silver-lead deposit is located in the Xiaoqinling metallogenic belt with most of its area covered by loess .Based on the traditional geochemical survey method is invalid in the prospecting of loess covered area and hydrocarbon have the features of strong volatile and penetrability and faraway migration distance,hydrocarbon measurement is used in test for prospecting of this area in the paper.After analyzing to hydrocarbon content and their anomaly distribution characteristics of different geological bodies,such as the known orebody,the surrounding rock of orebody,the overlying and around loess of the orebody,com-bined with the comparative analysis of hydrocarbon microstructure,it is found that the loess of the region contain information which come from deep blind orebody.It shows the feasibility to forecast mineralization by hydrocarbon measurement in loess covered area,and provides technological support in geochemistry for further prospecting in this kind of special landscape area.