In order to determine the role of the phase state of elements in anomaly recognition, the authors studied the compositions of sulfide phase, oxide phase and combination phase of Cu in porphyry copper deposits and Zn in hydrothermal lead-zinc deposits. In the porphyry copper ore district, Cu exists mainly in sulfide phase and oxide phase, with the criteria of the ore-related anomaly being (w_{sulfide phase Cu} + w_{oxide phase} Cu)/ w_{combination phase Cu}≥21、(w_{sulfide phase Cu} + w_{oxide Cu})/ w_Cu≥96%; in the lead-zinc ore district, Zn in the background area mainly exists as combination phase, whereas Zn in the anomalous sectors (w_Zn≥ 200×10^-6) mainly exists as sulfide phase (including oxide phase), with the segments characterized by (w_{sulfide phase Zn} + w_{oxide phase Zn})/ w_Zn≥87%、(w_{sulfide phase Zn} + w_{oxide Zn})/ w_{combination phase Zn}≥7 being the favorable ore-prospecting segments and serving as the marks indicating exposed ores or concealed ores.