Abstract: To further verify the feasibility of the hydrocarbon-mercury superimposed halo method in the coverage area of red beds in prospecting deep deposits, this study carried out area tests of hydrocarbon-mercury superimposed halo in 4.3 km2 of coverage area of Cretaceous red beds in the Hongyanxi ore block using a grid density of 160 m x 20 m. The following conclusions were drawn by summarizing the characteristics of the anomalies of metallogenic elements and hydrocarbon-mercury components in the soil in the red beds, including their superposition characteristics, field structures, patterns, spatial correspondence, and planar distribution patterns. ① There are deep-source and syngenetic superimposed fields in the soil geochemical field of red beds in the Hongyanxi ore block; ② Along the strikes of ore veins, syngeneic superimposed anomalies correspond to barren sections, while the deep-source superimposed anomalies correspond to ore sections. Along the dip directions of ore veins, the ore bodies under the control of paired bimodal anomaly mode occur in ore sections, while other ore bodies occur in barren sections; ③ Planarly, the distribution direction of zonal anomalies consisting of anomalies in the head and tail parts of the paired bimodal anomaly pattern is the pitch directions of orebodies. The superposition of different zonal anomalies indicates the occurrence of parallel blind veins in deep parts. These conclusions were verified in deep engineering, indicating ideal prediction results.