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| Discussion and research on the application of the wide field electromagnetic method to the exploration of metal ore deposits |
JIANG Yong-Fang1,2( ), LI Fang-Shu1,2, CAO Yuan3, XIA Ling-Yun1,2, ZHANG Ting1,2 |
1.Hunan Geosun Hi-technology Co.,Ltd.,Changsha 410208,China
2.Hunan Deep Earth Resources Electromagnetic Exploration Engineering Technology Research Center Changsha 410208,China
3.The Second Geological Exploration Institute of Henan Geological Mineral Resources Exploration and Development Bureau,Zhengzhou 451464,China |
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Abstract In the exploration of metal mineral resources,physical exploration is usually difficult but of low cost.Along with the increasing depth of the exploration and serious influence of human disturbance factors in the mining area,the difficulties and cost of physical exploration have been increasing.What's more,due to the limitations of the technical conditions such as the precision and power of the instruments and equipment,the geological effectiveness is getting worse and worse by adopting the general geophysical prospecting method.However,the wide field electromagnetic method has such advantages as great detective depth,high speed,low cost,high resolution and precision,and strong anti-interference capability,and hence can be effectively applied to metal mineral exploration,and this has been proved many times.Therefore,it is advisable to develop new methods,new technologies and new instruments represented by the wide field electromagnetic method in the investigation of deep orebodies as well as crisis mine resources.This paper introduces the basic principles,working methods,application principles and conditions of wide field electromagnetic method,analyzes and studies the case of a gold mine in Henan Province,and expounds the effectiveness of the wide field electromagnetic method in deep exploration of metal deposits.
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Received: 27 April 2020
Published: 26 October 2020
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| 岩矿石名称 | 标本数 | 极化率/% | 电阻率/(Ω·m) | | 范围 | 平均值 | 范围 | 平均值 | | 安山岩 | 42 | 0.135~2.388 | 1.047 | 1580.7~12213 | 5214.5 | | | 花岗斑岩 | 41 | 1.08~2.116 | 1.577 | 563.6~54139.5 | 5297.7 | | | 闪长岩 | 16 | 0.64~2.678 | 1.415 | 1137.4~8786.9 | 3942.5 | | | 片麻岩 | 39 | 0.707~3.081 | 1.143 | 250.8~10872.3 | 2847.8 | | | 矿化岩石 | 31 | 0.633~5.179 | 2.707 | 256.9~5559 | 1865.6 | |
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Statistical table of electrical parameters of rock (ore)
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Data processing flow of WFEM
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Two-dimensional inversion resistivity section and comprehensive interpretation results of WFEM in GY01 line
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Interpretation results section of GY01 line
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