The Geophysical Application Research On Deep Concealed Ore Deposit Prediction In LALA Copper Mines And Its Peripheral Area

With the development of our economy, the demand of the mineral resource is rapidly increasing. Because the mineral resources is nonrenewable,how to ensure the sustainable supply has became the national long-term strategic task. Considering the fundamental conditions of China, the possibility of explorering metallic ore deposit which exposed surface or shallow is getting smaller.Exploring the deep concealed ore has become an important research subject. In October 2002, Premier wen jiabao in new China geological work in the geological society of China for 50 years and established the 80th anniversary commemoration meeting stressed: "along with our country economy sustained, rapid growth, the national 45 main mineral in more than half of the mineral reserves consumption growth rates, especially the speed is greater than the middle area, east of old mines familiar past resource exhaustion, become the crisis mines. In market demand and resource potential old mines surrounding or deep, efforts to find new take resources, has economic and social benefit both the, the current is a very pressing task."The geology environment of LALA copper mines and its periphery areas are located in the most important metal metallogenic belt in southwest area of China. It's important to carry out geophysical technique applied researching for deep concealed orebodies in the region.Through analysing the geological background of LALA copper mines and its peripheral area, combining with the fact, we chose LALA copper mines and M114 aeromagnetic anomalies area in Huidong for applied research.Based on the geological background and the differences of physical property of the rock (mine) in the targeted area,we chose the high-power induced polarization method,ground high-precision geomagnetic method and AMT to carried out the applied researching for deep concealed orebodies prediction.(1) In the north of the LaLa copper mines,the applied effect of high-power TDIP was discussed,aimed at the shallower buried polymetallic ore body which consists mainly of copper and iron mines.In the HongNiPo area, we discussed the response possibility of the deep underground polarization body by using high-power TDIP method.(2) Applying the ground high-precision geomagnetic and AMT method in M114 aeromagnetic anomalies area,it is probably found out that the aeromagnetic anomalies characters of underground geological distribution.(3) Through analyzing the practical application effect of ground high-precision geomagnetic method and AMT sounding method in the M114 aeromagnetic anomalies area,combining the Ore-forming geological characteristics of HongNiPo mines area, it discussed the feasibility and the geological problems using ground high-precision geomagnetic method and AMT sounding method, and put forward the combination methods for exploring the concealed orebodies.In all, this paper make full use of existing research results,integrating geological background and the metallogenic features, then carried out the shallow, middle and deep multi-scale geophysical measurement.It proposed a method to reduce the multi-solutions and to improve the interpretation accuracy by multi-parameter analyzing in the process of geophysical interpretation.Thus it provided a more reliable geophysical basis for positioning prediction of deep concealed ore deposits.