Extracting magnetic anomalies based on an improved BEMD method: A case study in the Pangxidong Area, South China

► We proposed a stepwise stop criterion for sifting process in BEMD. ► BIMFs decomposed from experimental models meet require of orthogonality. ► Mode mixing in final results is depressed. ► Spatial Relationship between ore deposits and magnetic anomalies in BIMFs is revealed.