| The Zhuguangshan area in northern Guangdong is an important uranium ore gathering area in China,and several granite-type uranium ore fields have been proven.The Mianhuakeng uranium deposit is large in scale and deep in mineralization.It is produced in the southeast of Zhuguang Pluton.As one of the few large-scale uranium deposits still being mined,the Mianhuakeng deposit has a long history of development and research,and the exploration data is relatively complete.In order to meet the further mining needs of mines,the search for deep concealed ore bodies has become a key issue of current research in this area.In this paper,guided by the theory of deposit genesis,mineral exploration and mineral prediction,the combined analysis of ore-induced geological anomalies and ore-causing geological anomalies,to achieve deep metallogenic prediction.Based on the actual geological data of the study area,analyze the mineralization geological background,explore the mineralization period,analyze the genetic types,summarize the prospecting signs,and establish the prospecting geological model.Aiming at the abnormal process of ore-causing geology,numerical simulation technology is used for analysis.Numerical simulation can effectively synthesize the research results of multiple disciplines,realize the visualization of the dynamic process of mineralization,and quantitatively analyze the research results to delineate favorable areas for mineralization.This thesis takes the Mianhuakeng uranium deposit as the main research object,and the research results obtained are as follows:(1)Based on the theory of metallogenic geological anomalies and existing exploration data,comprehensively analyze the metallogenic geological background,genetic types,and stages of the Mianhuakeng uranium deposit,and construct a geological model for the prospecting of the Mianhuakeng uranium deposit.(2)Collect and sort out the basic data of the Mianhuakeng uranium deposit,and use 3D visualization technology to construct a three-dimensional geological entity model of the Mianhuakeng uranium deposit.(3)Summarize the principles of numerical simulation of the mineralization process.Construct a geological model required for simulation,use force-heat-fluid coupling to simulate the evolution of volumetric strain and fluid flow in the mineralization process,analyze the simulation results,and discuss the mineralization law of Mianhuakeng uranium deposit.Count the relationship between different elements and ore bodies,extract favorable metallogenic intervals,and delineate favorable metallogenic regions with abnormal ore-causing geology.(4)Using the prospecting model as a guide,extract and analyze various ore-controlling elements,and complete the three-dimensional reconstruction of the geological anomalies caused by the Mianhuakeng uranium deposit.Use the three-dimensional information method and the weight of evidence method to delineate the favorable areas of mineralization caused by geological abnormalities.(5)Carry out joint analysis of ore-induced geological anomalies and ore-causing geological anomalies,and delineate 4 prediction target areas at locations where ore bodies are not known.The target areas are sorted and divided into A-level target area,two B-level target areas,one C-level target area.(6)Quantitatively evaluate the three-dimensional prediction results from the four aspects of modeling data foundation,work level,prediction block unit and prospecting geological model accuracy,and obtain a comprehensive prospecting probability of 58.90%.Use VRP software to display the research results for system integration. |
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