| As an important factor of human development,the exploration work of mineral resources has always been the key research object of various countries,but with the development of human industry science and technology,the demand for mineral resources,especially metal mineral resources,has increased rapidly,and many mines and mines are facing different degrees of resource depletion crisis;therefore,On the basis of today's proven mineral resources,it is very important to continue to survey the deposits hidden in the deeper depths of the earth.However,in order to carry out effective and high-precision exploration of deep mineral resources,it is difficult to achieve this goal only by traditional geological methods,and geophysical methods have the advantages of large detection depth,high resolution and diversified methods,which can provide abundant information for the exploration of deep mineral resources.In addition,geophysics contains different principles.A variety of methods of different detection depth,the rational combination of these methods can meet the requirements for the exploration of complex deep mineral resources,for the prediction and exploration of deep mineral resources to provide strong evidence.Jinchuan copper-nickel sulfide deposit is the third largest in the world in nickel mining,is China's nickel,cobalt,platinum group elements of the important production enterprises and the world's third largest nickel supply.Jinchuan copper-nickel sulfide deposit has been discovered since the late 1950 s,and experts and scholars at home and abroad have carried out a lot of research work,and great progress has been made in geology,mineralogy and other fields,in recent years,with the improvement of exploration technology and geological understanding,the main mining area of Jinchuan copper-nickel sulfide deposit(?,?,?,?).In order to maintain the sustainable development of the mining area,the exploration and exploitation work in ? mining area is very adequate,so it is urgent to carry out the prospecting work for the deep part and the periphery of Jinchuan mining area.Based on the previous geological cognition,combined with the results of the processing of various geophysical data of heavy,magnetic,electric and seismic,this study studies Jinchuan copper-nickel sulfide deposits from different scales and different orientation directions,and the following conclusions are obtained:(1)In the detection of deep deposits in Jinchuan mining area,there are limitations of single geophysical method,combined with satellite gravity,aeromagnetic,seismic tomography and controllable source audio magneto telluric results,it can be found that there are geophysical anomalies in the southwest side of the proven mining area,and its aeromagnetic anomaly is similar to the main mining area,The electrical and seismic properties are similar to those of ore body and ore-bearing rock mass,and the region is also in agreement with the deep Metallogenic target area speculated by Metallogenic model,which is the key target area of deep prospecting.(2)According to the previous Metallogenic model theory and the geological profile of the mining area,the geological-geophysical model of Jinchuan mining area containing the inferred deep information is established,and the observation system of seismic exploration of the deep deposit in Jinchuan is optimized by using seismic illumination analysis technology.(3)According to the results of natural seismic tomography,combined with the previous Metallogenic model and tectonic evolution theory,geochemical conclusion,it is speculated that the material source of Jinchuan copper-nickel sulfide deposit is deep mantle source material,its depth is greater than 400 km,the current seismic tomography results of low-speed matter is only the product of its movement.(4)To analyze the exploration effect of different geophysical methods in deep deposits in Jinchuan mining area,and then summarize the comprehensive interpretation emphases of various geophysical methods in the prospecting of deep metal ore. |
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