Application of Fuzzy Weights of Evidence Method in Mineral Resource Assessment for Polymetallic Deposit in Chende District, Hebei Province, China

摘要

Chengde District has Large distributed Yanshanian acidic rock and fracture structure, metallogenic condition is superior, where is the mineral resource rich area of lead, zinc and silver polymetallic deposit in Hebei province. Based on the study of metallogenic regularities and ore controlling factors, according to the space correlation significant index t value,extract some evidence layers, such as the Yanshanian acid rock body, fracture and intersection of fracture, geochemical anomalies, metamorphic crystalline basement and volcanic basin. Calculate weights of each layer of evidence, the Results show geochemical combination anomalies and comprehensive anomaly have important value for prospecting. Application of Fuzzy Weights of Evidence Method carried on the comprehensive metallogenic information, the prediction result in accordance with the distribution of known deposits. Two Prospecting target has mineralization on the basis of field exploration. Demonstrate the predicted results can be used to guide the polymetallic deposit prospecting work.