The southern Jiangxi region is a critical source of ion-adsorption type middle and heavy rare earth resources in China.However,continuous resource depletion,coupled with the emergence of new global rare earth sources,has raised concerns about the regional long-term resource viability.Traditional qualitative or semi-quantitative prediction methods have proven inadequate in addressing these challenges,leading to uncertainties in resource potential assessment.This study employs a fuzzy analytic hierarchy process to quantitatively predict the potential of ion-adsorption type middle and heavy rare earth resources in southern Jiangxi.The research integrates multidimensional geological data,including geological,climatic,and geomorphological factors,with distribution characteristics of 95 known ion-adsorption type rare earth deposits.A comprehensive predictive model is developed using group decision-based analytic hierarchy process for weight calculation,fuzzy mathematics for membership function construction,and concentration-area(C-A)fractal analysis for threshold determination.Key findings include:(1)The Y/La geochemical ratio in stream sediments varies significantly between different rare earth deposit types,with light rare earth areas showing an average ratio of 0.68,compared to 1.3 in middle and heavy rare earth areas.This ratio emerges as a potential key geochemical indicator for rare earth deposit classification.(2)The incorporation of expert weighting coefficients in the analytical hierarchy process reduces subjectivity and uncertainty in the model predictions compared to traditional methods.(3)The study identifies five Class A and three Class B prospective areas for ion-adsorption type middle and heavy rare earth deposits in southern Jiangxi,based on regional geological characteristics and known deposit information.The research reveals a"strong south,good central,weak east-west"distribution pattern of rare earth mineralization intensity in southern Jiangxi.Recent exploration results suggest significant untapped potential for new ion-adsorption type middle heavy rare earth deposits in the region.This study not only provides a foundation for future rare earth exploration in southern Jiangxi but also demonstrates the effectiveness of the fuzzy analytic hierarchy process in mineral resource potential evaluation.It showcases the method's capability in handling multi-dimensional geological data,offering a valuable case study for similar applications in resource assessment.
metallogenic predictionion-adsorption typemiddle and heavy rare earth depositfuzzy hierarchical analysis methodGISsouthern Jiangxi
维普
万方数据
