Quantitative Prediction Of Deep Resources Of Xiongcun No.2 Deposit Based On Geological 3D Modeling

With the continuous exploitation of near-surface minerals exhausted,the search for deep mineral resources has become the main direction of future resource exploration.In view of the characteristics of difficult exploration and high mining cost of deep mineral resources,a new theory,new technology and new method suitable for deep mineral quantitative prediction should be found.The emergence of three-dimensional visualization modeling method provides a new solution for deep mineral prediction,which can effectively predict the spatial distribution characteristics of deep mineral,provide modeling display and achieve the purpose of quantitative prediction,and is of great significance for finding new alternative resources.In this paper,3D visualization modeling and quantitative prediction of deep mineral resources are carried out in a typical demonstration area Xiongcun porphyry copper and gold deposit gathering area based on the special topic "evaluation of deep resource potential and demonstration of target area optimization of Xiongcun ore gathering area" of the national key research and development program deep project.Thesis collected a large amount of original geological data in the study area and the exploration data,the data logging,integration,digital,on the basis of the original data integration and "secondary development",set up the Tibetan male village no.2 orebody comprehensive geological database,and use the mature commercial 3D geological modeling software Surpac,through the visualization of 3D modeling and the comprehensive information research method for prediction of ore deposit,the following main research results and progress has been made:(1)Collect the data of original geology male village,set up the no.2 orebody comprehensive geological database,and by using Surpac software built including formation,drilling,orebody,structure,geological body,three-dimensional entity model of ore deposits,the spatial properties of the proposed model,through the man-machine interactive graphic operation,can be intuitive view the geological body internal space distribution characteristics.(2)To block division of entity model,set up the ore body,structure,geological block model,combination will analyze the data of drilling,the high grade after treatment,respectively,using the distance power inverse ratio method and the ordinary Kriging method of interpolation block model,estimated orebody existing resources/reserves,including distance power inverse ratio method to estimate the amount of Cu metal 1337284 t,Au metal quantity is 76154 kg,Ag187645kg,ordinary Kriging method to estimate the Cu metal capacity is 1283557 t,Au metal quantity is 74265 kg,Ag179861 kg,The error of the two estimation methods is less than 5%,which proves that the estimation results of resources/reserves are accurate and reliable.(3)Combined with 3D model and quality control factors,quantitative research,on the basis of block model integrated forecasting model is established,using evidence weight method and prospecting method to forecast the No.2 orebody deep resource information,selects the deep favorable metallogenic target,through deep prediction model to calculate the potential resource of Cu497189 t Au19773kg,Ag70323 kg,its predicting depth of 900 m,compared with the existing orebody and prospecting probability is calculated by more than 50%.The results are of great significance for guiding the future exploration plan and improving the success rate of exploration projects.