Citation: | LI Fengting, MIAO Hulin, FU Jia, ZHAO Yong, YU Zhonghong, MA Biao. 2023. Gravity and Magnetic Anomalies and Prospecting Prediction of Iron Polymetallic Deposits in the Downstream of Nalingguole River. Northwestern Geology, 56(6): 155-165. doi: 10.12401/j.nwg.2023185 |
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.
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Map of geology and mineral resources in the downstream of Nalingguole river
The combination map of bouguer gravity anomaly and fracture mine in the downstream of Nalingguole River
The combination map of 1∶50,000 aeromagnetic (△T) polarizing contour and fracture mine in the downstream of Nalingguole river
The combination map of 1:50,000 aeromagnetic (△T) contour and fracture mine in the downstream of Nalingguole river
Map of bouguer gravity horizontal total gradient model and superposition diagram of fault structure
The inferred geological results map of residual gravity anomaly and aeromagnetic (△T) polarization in the downstream of Nalingguole River