The Study Of Geological Feature And 3 D Forecast Evaluation In The Gold Ore Of Hongshishan,Inner Mongolia

In recent years,with the development of social economy,as necessities of the production development,the mineral resources appear shortage phenomenon and gold as the great strategic significance of scarce resources by more attention,gold demand continues to increase.Since the gold prospecting breakthrough difficulty increasing,the traditional gold mineral base is facing the plight of resource depletion,so we need to achieve a breakthrough in deep prospecting or searching for a new mineral base.Now along with the advance of computer science,visualization technology,3D modeling technology and the development of virtual reality technology is mature,so that the forecast of mineral resources can go beyond the traditional two-dimensional,gradually develop towards to the direction of quantitative three-dimensional space.Hongshishan gold deposit is located in Inner Mongolia.North of the deposit is antimony belt,the south is gold belt.The deposit is found by The Geological Survey of Shaanxi Province when they assume 1: 50,000 mineral survey in Inner Mongolia.The gold deposit is Carlin-type gold deposit.It is the first time found this gold deposit type in this region.This has important reference value to the region's future prospecting work.This study mainly aimed at the south gold belt,summarize and analyze the geological background of gold mines,ore geological characteristics,ore-controlling factors.I designed to try to use the three-dimensional prediction method in this area to evaluate the gold resource quantitative,seeking prospecting major breakthrough.The main content of this study is based on the hongshishan gold deposit of the regional geological background,ore deposit geological characteristics,ore genesis and prospecting marks were analyzed by summary mineralization law,build prospecting model.Based on the data of geologic section and the geophysical exploration results and drilling data,build the 3 d model of stratum,structure,rock,orebody and element anomalies in the study area.Then use the cube processing method for processing solid model,based on geological entity model for the constraint of three-dimensional cube extracting.Extract specific attributes of geological and assign property values.Finally,using the "three-dimensional system of concealed ore" which is based on “the weight of evidence” and “the amount of information” to work,to calculate each ore-controlling factor weights of mineralization and the probability of each cube unit containing ore quantity,through analyzing the relationship between the ore-controlling factors and prospecting marks changes in space with the orebody.