金属矿气体地球化学测量技术新进展

气体地球化学测量方法由于气体的强穿透性，可将大量的与深部矿化作用有关的物质携带到地表，可直接或间接指示各种地质成矿过程，而受到勘查地球化学的重视。经历数十年的发展之后，气体地球化学测量在测量指标、方法及影响因素研究方面都取得了长足进展。特别是近年来由于分析技术提高，使得很多超微含量的气体测定成为可能，一些新的气体测量方法相继提出，在寻找隐伏矿或盲矿方面获得了较好的效果。笔者对气体测量发展史、气体测量方法、指标及影响因素进行了简单总结，并重点介绍了一种新的气体测量技术（SDP）的测量原理、使用方法及应用实例。

NEW ADVANCES IN GAS GEOCHEMICAL EXPLORATION FOR METALLIC ORE DEPOSITS

A great challenge to economic geologists is the effective and quick locating of mineralization and the supply of basic areas for scientific drill hole arrangement.Great attention has been paid to gas geochemistry because gas can easily migrate through different overburdens and gas anomalies can indicate underlying mineralizations directly or indirectly.After decades of development,a significant improvement has been made in gas geochemical survey in such aspects as indicators,analytical and sampling methods,and data processing and interpretation.With the utilization of GC MS as a routine analytical tool for gas analysis,the determination of a suite of ultra trace level compounds with extremely low detection limits has become possible.In recent years,several new gas geochemical approaches have been developed in the Western Countries,which prove to be effective for exploring concealed or blind ore bodies.This paper has briefly summarized the development of gas geochemical survey,sampling and analytical methods,main indicators and factors related to gas survey.A new gas geochemical survey (SDP) technology is emphatically discussed in this paper in the aspects of the principle,applying and analytical methods,and case studies.