Three-dimensional Modeling And Metallogenic Prediction Of Yangshuwa Silver Deposit In Chifeng,inner Mongolia

Within the scope of exploration rights of Aohan Xinhe Mining Co.,Ltd.,the paper chooses Yangshuwa silver metallogenic as study object.Collecting and sorting out the exploration data of the study area,establishing the exploration engineering database,using Surpac three-dimensional software to carry out three-dimensional geological modeling,building three-dimensional borehole model,three-dimensional surface model and three-dimensional geological body model.According to the regional geological and mining area geological characteristics,ore deposit orebody characteristics,geophysical and geochemical exploration results,using metallogenic theory to carry out comprehensive analysis under the three-dimensional geological body model,the silver ore prospecting model in the working area is constructed.On the basis of three-dimensional geological model and prospecting model,"cube model" prediction method is adopted to carry out three-dimensional prospecting prediction.Quantitative information of prospecting is given to cube blocks,and the "quantitative prediction system for concealed ore bodies(3DMP)" is used to predict mineralization by weight of evidence model.In the three-dimensional block model,the prospecting target area is determined according to the posterior probability grade of block unit.A posterior probability statistical map of Yangshuwa working area was made in the statistical analysis.After comprehensive analysis of existing mineralized bodies,statistical maps and posterior probability block maps of Yangshuwa working area,blocks with posterior probability values above 0.9 are taken as prospecting targets.The block is red in the posterior probability map.The predicted target area is between 4050519.9-40502079.9 in topographic map,467330-4639250 in X coordinate and above 400 meters in elevation.The predicted target area consists of 12152 blocks,and the three-dimensional space of the target area is 48608 000 cubic meters,which is divided into two sections from south to north.The block units of the target area are sorted out separately,and the target area map of mineralized body in Yangshuwa working area is made.