The Dongfang tree farm in northern Da Hingganling volcanics belt is situated in the northeastern part of the Deerbugan metallogenic belt. Its silver anomalies are Ag, Mo, Zn, Au and As composite anomalies. The Ag anomalies mainly assume planar distribution, with some high-value anomalies in zonal distribution. The anomalies are large in size, and have concentration zoning, concentration centers and high standard deviations as well as high threshold values, associated locally with Mo anomalies. The anomaly area shows planar argillation alteration and low denudation degree, quite similar to the Wunugetushan large-size porphyry Cu-Mo deposit in the same metallogenic belt in ore-forming geological conditions and anomaly characteristics. Besides having very good vista in prospecting for porphyry Ag (Au) polymetallic deposits, the anomaly area is likely to have hydrothermal veinlike Ag (Au) polymetallic deposits.