Abstract: The downstream area of the Nalingguole river is predominantly covered by Quaternary sediments. Several polymetallic ore deposits, primarily composed of iron, have been discovered in this region. However, the presence of sediment cover has increased the difficulty of prospecting activities. In this study, the author analysied of the distribution characteristics gravity and magnetic anomalies, and inferred the fault structure of the study area in the downstream structures of the Nalingguole river, focusing on 1∶50,000 aeromagnetic anomaly data and 1∶200,000 regional gravity data. Based on the relationship between strata, rock mass, gravity and magnetic field in the southern bedrock outcropping area, deduced and divided the distribution of strata and intrusive rocks under the overlying area. Moreover, the mineral occurrences are predominantly found near inferred fault lines, indicating a clear influence of fault control. Two prospective mining targets were identified, providing favorable evidence for future ore exploration and target selection in the (partially) covered areas surrounding the Qaidam basin.