Comprehensive Geophysical Prospecting Method Application In Fujian Shuangqishan Goldfield

With the deep development of geological prospecting work,The opportunities for prospecting that relying on the surface to detect alteration,mineralization,turning stones and outcrops will be fewer and fewer,the exploration of shallow resources is becoming more and more difficult,conventional geological and geophysical geochemical exploration methods are restricted(The work is now shifting to the underground to look for concealed orebodies),therefore,searching for deep buried ore exploration methods has become the focus of future prospecting and exploration.Today,for geophysical exploration,deep earth exploration is the main direction of development in recent years.However,every geophysical method has its limitations,singleness and multiplicity that causes the difficulty and deviation of data processing and interpretation.Therefore,the comprehensive use of two or more geophysical methods is an important direction of earth exploration research.The polarization method,which is also called excitation polarization method.In its development process,there are many branches of theory and technology,which is widely used in geophysical exploration,especially in the search for metal sulfide ores.Electromagnetic sounding technology has its advantages in geophysical exploration,it plays an increasingly important role in the detection process of oil,natural gas,mineral resources and groundwater resources.Abnormality can be reflected on the polarizability by using polarization method,t he electromagnetic sounding technology shows the spatial distribution characteristics of structural mineralized zones in vertical direction,and confirm the spatial distribution and distribution characteristics of tectonic mineralized zones in plane and space,t his two parts are in interdependence and mutual validation.This paper is based on the project of Shuangqi Shan Mining Co.,Ltd.in Fujian province which carry out the ?Gold comprehensive geophysical prospecting in Fujian Dehua Shuangqishan ?,Through the analysis of geological and geophysical characteristics in Shuangqishan gold mining area in Fujian province,the main idea to achieve the desired goal is to combine the two geophysical methods for prospecting,one is induced polarization method(Taking time domain excitation as an example)and the other is electromagnetic method(taking EH4 electromagnetic imaging system as an example),And make a brief analysis about some of own experience in this research process.Comprehensive some information about integrated geophysical prospecting,surface sweeping,audio frequency,magnetotelluric sounding,geology and so on,3 prospecting target areas have been circled,the prospecting target area are No.I,II and III respectively,The deep region of 2 prospecting targets is the preferred direction for ore prospecting in the next stage.the verification drilling in late construction of104 line of audio magneto telluric are at the depth of the hole about 662 m and 692 m,exsit gold mineralization with grade of 2.94 and 1.03g/t respectively,Corresponding to the low resistance abnormity edge of D104-1 low resistance abnormity edge,the result corresponds to the inference..It provides geophysical basis for geological exploration of next step in prospecting target area.The results show the effectiveness of the above method in geological conditions under the Shuangqishan,and provides reference for prospecting work under the same kinds of geological conditions,it deserve to be popularized and applied.