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| NEW ADVANCES IN GAS GEOCHEMICAL EXPLORATION FOR METALLIC ORE DEPOSITS |
| CUI Xi-lin1,WANG Ming-qi1,TANG Jin-rong1,2 |
| 1.School of Earth Sciences and Resources,China University of Geosciences, Beijing 100083,China; 2.Research Center of China Geological Survey,Beijing 100037,China |
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Abstract 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 GCMS as a routine analytical tool for gas analysis,the determination of a suite of ultratrace 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.
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Published: 10 April 2009
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