Mapping Mineral Prospectivity Using a Hybrid Genetic Algorithm–Support Vector Machine (GA–SVM) Model

• Published in: ISPRS international journal of geo-information 2021-11, Vol.10 (11), p.766
• Main Authors: Du, Xishihui, Zhou, Kefa, Cui, Yao, Wang, Jinlin, Zhou, Shuguang
• Format: Article
• Language: English
• Subjects: Accuracy; Adaptive search techniques; Algorithms; Au deposits; Classification; Data processing; Datasets; Deposits; Gene mapping; genetic algorithm; Genetic algorithms; Geology; Learning algorithms; Machine learning; Mapping; Mineral exploration; mineral prospectivity mapping; Mutation; Optimization; Optimization techniques; Parameter estimation; Spatial data; support vector machine; Support vector machines; Training
• ISSN: 2220-9964; 2220-9964
• DOI: 10.3390/ijgi10110766

Machine learning (ML) as a powerful data-driven method is widely used for mineral prospectivity mapping. This study employs a hybrid of the genetic algorithm (GA) and support vector machine (SVM) model to map prospective areas for Au deposits in Karamay, northwest China. In the proposed method, GA is used as an adaptive optimization search method to optimize the SVM parameters that result in the best fitness. After obtaining evidence layers from geological and geochemical data, GA–SVM models trained using different training datasets were applied to discriminate between prospective and non-prospective areas for Au deposits, and to produce prospectivity maps for mineral exploration. The F1 score and spatial efficiency of classification were calculated to objectively evaluate the performance of each prospectivity model. The best model predicted 95.83% of the known Au deposits within prospective areas, occupying 35.68% of the study area. The results demonstrate the effectiveness of the GA–SVM model as a tool for mapping mineral prospectivity.