The extraction and integration of geochemical anomaly information from Zhangjiakou area, Hebei Province

Abstract: Using the local singularity method, the authors determined the optimal alpha threshold based on the point-surface space related significant index t value of the weight of the evidence method, and delineated the distribution of single element anomalies. At the same time, based on the generalized self-similarity principle, the authors used the S-A method to decompose the complex anomaly, and detected the spatial distribution of the regional background field and the anomalous field. Because the delineated anomalies are well consistent with known Pb-Zn-Ag polymetallic deposits, they can provide geochemical evidence for delineating target areas. Research shows that the local singularity method and the fractal filtering method can effectively enhance the weak anomalies, extract the ore-forming anomalies, and help explore concealed ore bodies in Zhangjiakou area.