The Research And Application Of Geophysical Methods In The Exploration In The Mine In Inner Mongolia Province

Magnetic exploration is widely used in the search for a variety of metal containing magnetic minerals and non metal deposit prospecting, regional geological structure, oil and gas structure and coalfield structure etc.. Magnetic exploration is one of the most mature theory of geophysical exploration methods, work efficiency is highest, lowestcost method, are the most widely applied in ore exploration.The scope of application of electrical prospecting is very extensive, both inmetallic and non-metallic solid exploration, still looking for groundwater resources, oil and gas resources and geothermal, have obtained successful application. Electrical prospectingis based on electrical properties of differences between the majority of rocks and oresin the crust as the basis, so as to find out the undergroundgeological structure andmineral distribution.Distribution according to the characteristics of ore bearing target layer in the studyarea, launch the ground high precision magnetic survey, large power induced polarization measurement and EH4 magnetotelluric sounding work, and themeasurement results done in-depth study.(1) the measurement results of magnetic method: data were reduced to the pole,continuation, a derivative of the vertical level, determine the magnetic anomaly center to the two order derivative processing, and speculates the buried depth, judge fault structure line of the magnetic body, and ascertain the boundary of magnetic body.Aeromagnetic data reduction to the pole and then made multi-scale wavelet decomposition, the average depth of the magnetic source bodies were calculated by using the method of spectral analysis. Wavelet multi-scale decomposition method and conventional field source separation(pole extension) method than that,judging fromthe depth of the magnetic source bodies perspective,wavelet multi-scale decompositionmethod in actual production application is more efficient, more can directly guide the next step work arrangement.(2) the large power induced polarization measurement and EH4 magnetotelluric sounding results: combined with geological information and geochemical data, the delineation of the geophysical anomaly prospecting target area, roughly identified silver polymetallic ore and sulfide about the spatial distribution characteristics of body.Based on comprehensive analysis of geophysical data, high magnetic anomaliesdelineated with a certain scale of local 13, with ore prospecting significance of highresistivity and high polarization anomaly 3, mainly fracture and to infer the structure of this area to the north east trend, the NW striking fault for the times; there are multiplelarge scale dikes in the area of shallow; deep concealed with acid batholith. A variety of geophysical methods combined, using magnetic prospecting and electrical prospectingphase IP sounding and EH4 magnetotelluric sounding combination, in search ofmagnetite and multi metal ores, various geophysical assemblage method plays acomplementary role, confirm each other. Put forward "prospecting key sections of large scale geophysical measurement, the summarization of metallogenic regularities in this area, preferably prospecting target" proposal. And through the hole and verify, confirm the comprehensive geophysical prospecting method is effective and reasonable, and provide reference for other similar types of prospecting areas, has a certain practicalsignificance.