Large-scale Integrated Geophysical Methods in Pilot Survey of Deep Mineral Prospects:An Example of a Gold Deposit in Northeastern Hunan Province

Geophysical methods play an important role in forecast of deep prospecting. While they face the problem of multiple solutions. Taking a gold deposit in northeastern Hunan as an example,this paper address the issue how to improve the accuracy of prediction of deep prospects using integrated multiple geophysical techniques. In this area,a comprehensive survey has been conducted including large-scale measurements of gravity,precise magnetism and CSAMT( controlled source audio magnetotellurics) to delineate the deep prospecting targets. The geophysical marks of this area were determined through drilling validation and geophysical electric,magnetic logging,indicating outstanding results of the geophysical survey. It demonstrates that the application of integrated geophysical methods to evaluation of deep mineral prospects is fast and effective. It is recommended that such a geophysical exploration model can be spread all over the country.