Metallogenic Prognosis And Quantitative Evaluation Of Gold Deposits In Chongli District,Hebei Province

Chongli area of Hebei province is located in the middle part of north margin of North China land,with many gold deposits and concentrated output.It is one of the most important gold producing areas in China,and also the largest distribution area of gold deposits in alkaline rocks in China.This paper,relying on the project of "prospecting and forecasting in Xuanhua Fengning mine area of Hebei province" by the development and research center of the China Geological Survey Bureau,carries out the prediction and evaluation of the location,quantity and probability of gold in the Chongli area of Hebei.The following understanding and results are obtained.1.Under the guidance of the metallogenic series theory,the metallogenic regularity study is the main line,and the analysis of the metallogenic geological background of the study area,the main metallogenic period of the study area,the genetic type of the research area,and the type of mineralization in the study area are based on big data.The text excavation technology highly enhances and consolidates the possible metallogenic conditions,ore-controlling elements,and ore-prospecting signs in the study area.On this basis,it combines the actual conditions of the study area,refines and simplifies,and then builds a prospecting model in the study area.2.Based on the fractal theory,the optimal mesh unit size is determined by analyzing whether the fractal characteristics of the ore-forming favorable information have different self-similarity under different unit scales.3.Based on the metallogenic geological anomaly theory and the comprehensive information forecasting theory,the various mineralization anomalies such as land,material,chemical,and remote areas in the study area are guided by the ore-prospecting model,and the land,material,chemical,and remote areas in the study area are realized.Quantitative analysis and extraction of mineralization anomalies,construction of a regional prediction model,and delineation of eight minimum prediction areas based on evidence weights and ore prospecting information volume forecasting methods,the use of geological volume method to obtain gold deposits predictive resources 47.08 tons,to achieve the study area Gold mine positioning prediction and quantitative evaluation.4.A comprehensive evaluation of the prediction results was conducted from seven aspects: basic data evaluation of modeling data,evaluation of quantitative prediction methods,evaluation of positioning prediction results,evaluation of forecasted resources,evaluation of prospecting probability(risk),hierarchical classification of forecast results,and suggestions for subsequent exploration and deployment.