3D Geological Modeling And Metallogenic Prediction Of Wulong Gold Deposit In Liaoning Province

Wulong Gold deposit is located in the west of Dandong,Liaoning Province,near the Yalu River fault zone in the northeast of the North China Craton.It is the only super-large quartz vein type gold deposit in the eastern Liaoning province.The regional Mesozoic magmatic activity is intense,and the representative pluton are the early Cretaceous Sanguliu pluton and the middle Jurassic Wulong pluton,which the E the middle Jurassic Wulong pluton is the ore-hosting pluton of the gold ore body.A series of NNE,NW and NSW trending dikes are developed in the mining area,and their lithologies include diorite dikes,granite porphyry dikes,lamprophyre dikes,diabase dikes,etc.Previous research results show that the diorite dikes and gold quart veins have the same occurrence state,and the emplacement time of the two is also very similar.Therefore,it is of great practical significance to conduct fine 3D geological modeling of the Wulong gold deposit and further sort out the temporal and spatial relationship between the dikes and ore bodies,which is of great practical significance for summarizing the metallogenic laws of the Wulong gold deposit and further excavating the deep metallogenic potential.This paper collects and organizes the regional geological achievement reports,geological exploration data,deposit exploration data and the achievements of many scholars and scientific researchers of Wulong gold deposit over the years,summarizes the geological characteristics of Wulong gold deposit,and combines the team scientific research project data.Based on the SKUA-GOCAD 3D modeling and analysis platform,through solid modeling and attribute modeling,the metallogenic favorable parts of the Wulong gold deposit are predicted,and the results are as follows:1.Comprehensive and systematic collection of historical data of Wulong gold Deposit,combined with the newly obtained results,a general 3D geological modeling of Wulong-Sidaogou ore concentration area is carried out,and the main structural framework is constructed.Combination of tectonic mineralization area,related to ore and metallogenic geological body,fault and other geological object three-dimensional geological modeling,wulong gold mine,the surface model is set up,geochemical model,drilling,geological model,structure model and orebody model,expression and ore-controlling geological factors of 3D visualization display,determine the threedimensional spatial distribution characteristics.2.Relying on the team "Liaodong typical gold polymetallic deposit field 3D multi-parameter comprehensive geological modeling" project of geophysical data,build the wulong gold mine apparent magnetization data body,combined with the geochemical data and geological exploration data to construct the wulong gold deposit contains many parameters of elements such as geological,geophysical and geochemical exploration database.3.Based on the 3D geological model and multi-parameter database of Wulong gold deposit,the evidence layer for metallogenic prediction is constructed,and three algorithms including logistic regression,weight of evidence method and random forest are used to predict favorable ore-forming positions.The results of three algorithms are superimposed and 8 favorable ore-forming sites of Wulong gold deposit are selected according to the actual geological conditions.