The Study Of 3D Geological Modeling And Metallogenic Prognosis And Evaluation Of Dayingezhuang-Xiadian Gold Field,Shandong Province

Fault zone of Zhaoping is one of the most important metallogenic belts in northwestern of Jiaodong,Controlling three gold mine field of Linglong,Da YinGezhuang-Xia Dian,JiuDian.It has been proven gold reserves of nearly 800 tons,is China's important prospecting of gold deposit,exploration and scientific research base.Da YinGezhuang-Xia Dian gold field in the study area is located in the middle of Zhaoping fault zone.After a large scale of mining and production,prospecting breakthrough difficulty of Zhaoping fault zone increases,many mines is facing the problem of resource depletion,to alleviate the pressure of the shortage of resources,it's necessary to look for deep mining and new mineral base.Therefore,combing with new technology and new method for Da YinGezhuang-Xia Dian gold resource potential prediction and evaluation is imperative.In recent years,along with the advance of computer science,visualization technology,3D modeling technology and the development of virtual reality technology is mature increasingly,making the prediction of mineral resources surpass traditional geological Two-dimensional prediction,developing gradually to quantitative development of three dimensional spaces.Three dimensions prediction in order to realize the visualization of plasmid research not only helps the realization of digital and quantitative research of geological information in the era of "big data",and can be more effective to analysis,process,evaluate and predict geological data.This paper,based on 3d visualization technology,study regional geological background of Da YinGezhuang-Xia Dian gold field,includes four steps to realize quantitative prediction and evaluation in the study area.Firstly,collecting the existing geological data,building geological spatial database,analyzing the ore deposit geological characteristics and metallogenic regularity,this paper establish ore-prospecting model of the study area.Secondly,based on the data of prospecting line section,combined with geological report of the study area,we apply the current mainstream geological 3 d modeling software Surpac to build 3d geological entity model.Thirdly,using the "cube prediction model" method to establish the block model of research area and extract cube,statistical data cube unit contains,add prospecting quantitative information to each unit cube.Fourthly,applying "concealed orebodies quantitative prediction system",combining with two statistical methods of three dimensional evidence and the three dimensional information analysis the ore-controlling factors and prospecting marks quantitatively and qualitatively,select the variables and the range interval,calculate Posterior probability and prospecting information,thus delineating favorable areas for prospecting.Finally,using the volume estimation,degree estimation and metallogenic breadth and intensity method to estimate resources of favorable prospecting area,analysis the predicted results and ore-controlling factors,synthesize data base,the degree of work,and the prospecting prediction units,prospecting model to evaluate prediction accuracy of the study area,finally realizes the three-dimensional positioning and quantitative and constant probability forecast of the Da YinGezhuang Xia Dian gold field.