Application of CSAMT to Deep-edge Exploration in Crisis Mines:Taking Antimony Exploration in the Daocaowan Mining Area of Hunan Province for an Example
In recent years,many large and medium-sized non-ferrous metal mines in China have experienced severe resource shortages after years of mining.Focusing on the current situation of the crisis mine,i.e.the Xikuangshan Antimony Mine in Hunan Province,the paper attempts to achieve breakthroughs in mineral exploration in the deep edge of the mine and find continuing resources.Eleven controlled-source audio-frequency magnetotellurics(CSAMT)profiles are laid out in the Daocaowan mining area in the northern part of Xikuangshan Mine.By means of pre-processing,static correction and two-dimensional inversion,the existence state of buried antimony orebody controlled by faults and strata in this area is studied.According to the research results,the distribution characteristics of ore controlling faults in the Daocaowan mining area have been highlighted,and the position of hidden ore bodies has been inferred.The later drilling verification shows that the interpretation results of CSAMT are consistent with the actual situation,such as the positions of fault structure and ore body.The research results indicate that the CSAMT method is effective in prospecting antimony in the area,and can provide scientific basis for future exploration of similar crisis mines in the deep edge.
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