3D Modeling And Metallogenic Prediction In Zaozigou Gold District,Gansu Province,China

Gansu Zaozigou is an important gold district in the Western Qinling area China.With the development of resource exploration,it is getting more difficult in prospecting.The innovation of new ways and new technology is imminent.Therefore,it needs to improve the law of prospecting,and promote the deep part exploration work using new means.In this paper Zaozigou,Gansu were taken as an example,according to the series of metallogenic theory and geological anomaly theory,based on geological,engineering and geochemical data,utilized both three-dimensional visualization and mathematical modeling method to build the 3D geological model and take metallogenic prognosis.The results will have an important reference value for prospecting in Zaozigou gold mining area,concentrating deep and surrounding areas.The main conclusion of this paper are as follow:(1)The establishment of three-dimensional geological model of Zaozigou gold mining area: On the basis of depth understanding of the research area geological background and the typical deposit analysis(metallogenic model,prospecting model),we collected the multivariate data(DEM,reginal mineral geological map,topographical geological map,geological section,middle sample plane graph,bore histogram,ore vertical projection)in the research area systematically.We establishedthe three-dimensional model of the Zaozigou,including: structural model,rock mass model,ore body model and DTM.(2)Study of stibnite mineral typomorphic characteristics: Sample stibnite systematically at different elevation and location.Based on crystalline forms and chemical composition of stibnite,it provide theoretical basis and technical support for ore genesis and deep ore prospecting.Compute ore-forming temperature from stibnite cell parameter,build three dimension temperature field,analyze and summarize distribution character of ore vein,furtherlly,predict deep metallogenic information.(3)Study of fault structure complexity: calculating capacity dimension of the fault to set up surface fault complexity model of mining area.According the comprehensive analysis of gold vein,mineralization favorable fault complexity is0.95 to 1.43,this numerical range is the symbol of concentrated mineralization In1.11-1.27 range,gold vein especially concentrate.Therefore,it is proved to be most propitious mineralized location.Then then extract the deep structure model,compute complexity at different elevation,combine with gold ore body model,Reasonably predict deep metallogenic space.