The CSAMT3D Electrical And Structural Characteristics Of The Gold Mine In Inner Mongolia

Jinchanggouliang Mine are located in Chifeng City, South of Ao Han banner, Inner Mongolia,85km north of Chaoyang city, Liaoning province,158km east of chifeng city.The transportation is convennient and most roads are communicated with each other.In the tectonic area,The Jinchanggouliang Gold Mine belongs to the northern North China platform of Inner Mongolia axis,mineralized zone belonged to Zhangjiakou-grade gold ore belt in the East-Nooru metallogenic belt in the middle of the Tiger.Jinchanggouliang complex geological evolution and the process of creating complex geologic environment provide the necessary foundation of the rich resources and the geological scientific information for this area.And due to that,The domestic and foreign massive geologist arrives here to do the research work and obtained the quite rich geology and the geochemistry material.However, With the improvement of exploration level and development level, technology, relatively simple and easily find shallow ore is on the verge of endangered, the necessity of The complex development exploration and identifing hidden deposits are ineffable.In this area the deep geological study of the situation is less, only partial drilling information, in order to further meet mining production needs,Therefore, we have carried out the exploration work, filtering out of favorable target area for related research and design to finalize the selection of controllable source audio frequency magnetotelluric method of Geophysical Exploration method in the target area for exploration.Controlled source audio-frequency magnetotelluric method (CSAMT) is the70’s of the last century by Canada scholars presented by D.W.Strangway and his student M.A.Goldstein, on a theoretical basis and practical application of magnetotelluric method developed an artificial source frequency sounding method. And it has the exploration depth range, strong lateral resolution, exploration efficiency is high, both with depth and profile measurements,Combined with geological information, the mineralization favorable areas according to the characteristics of resistivity anomaly CSAMT location prediction of deep or peripheral concealed ore (mineralization) is very effective.Especially in the old mining disturbance, buried depth of the launch of a new round of prospecting,Even if between very many ore deposits and the adjacent formation the resistivity contrast is not very big, but the majority of metal ore deposit and the adjacent formation structure relations are quite close, may through the synthetic study and the analysis, then inquired about with the mineralization related rock mass, the structure, carries on the indirect prospecting. Application CSAMT law can also be of good import ore bodies and the construction of the spatial distribution patterns for Basic Outline, and in the mineral resources of the further exploration and development have a clear role in guidance.Although the CSAMT method compared with other geophysical methods has many incomparable advantages in geological and mineral exploration, but also has some shortcomings, such as the effect of static, near-field effect etc.Because in actual survey terrain and heterogeneous body influence, in CSAMT exploration existence static state displacement,if This phenomenon of the data processing is not removed, it will cause errors in data interpretation and even errors.Three dimensional inversion relative to the ID,2D inversion is the most effective means of electromagnetic law interpretation, not only can solve the problems of one-dimensional, two-dimensional, and the geoelectric structure survey area more accurate inversion.Accurately complete the real3D inversion is the current international hot, at the same time consistent pursuit is one of many geophysical workers, but because of the complexity of electromagnetic method inversion theory, the current situation at home and abroad, research on3D inversion of controlled source electromagnetic method are basically stay at the theoretical stage.Controlled source electromagnetic method is one of the most widely used electromagnetic exploration technology.In the geological exploration of the current, the fine has put forward higher requirements for the data processing and interpretation; at the same time, the study of three-dimensional data acquisition of high quality new type electromagnetic prospecting instrument has become the urgent requirements.Therefore, the3D inversion should become a new topic of the geophysical workers at home and abroad.Based on the field data by treatment of GDP32Ⅱ multifunctional electric instrument acquisition, in the process of conventional data preprocessing method, the surface static correction mode, static correction to comprehensive whole work area (curve shift), more properly reflect the regional electric3D feature.And carries on the OCCAM two-dimensional inversion, unifies the mining area the geological data, to measured under the line the terrestrial electricity cross section carries on the inference explanation, understood these measured under the line the low resistivity exceptionally with the break spatial distribution shape, the plane branching location, the section plane shape and so on,provides the physical prospecting basis for further prospects in the mining area.Also, as the2D anti-speech results in3D forms, in particular the cable tester to test the relevance, there is a clearer display, as well as to the mining underground geological Structural Feature for more comprehensive intuitive interpretation.