The Jilinbaolige Pb-Zn-Ag polymetallic deposit is located in the eastern part of Inner Mongolia and in the central-southern part of the Great Xing’an Range, in which several large-sized Pb-Zn-Ag deposits have been found. The Jilinbaolige deposit, which occurs mainly at the contact zone between Yanshanian granite intrusion and sedimentary strata, shows strong NE-to-NNE structural control. The deposit includes three ore-forming stages: (1) the arsenopyrite–pyrite–chalcopyrite–sphalerite stage, (2) the galena–sphalerite–quartz stage, and (3) the pyrite–calcite–quartz stage. In this study, we present a systematic study on the mineralogical and geochemical characteristics (including major elements, S isotopes, and Pb isotopes) of the main sulfide ore minerals in the Jilinbaolige Pb-Zn-Ag deposit in order to evaluate the metallogenic environment, ore-forming material source, and genesis of this polymetallic deposit. The sulfide typomorphic characteristics, ore fabric, and thermometry suggest that the genesis of sulfides in the deposit is closely related to magmatic-hydrothermal activity. The early stage of mineralization might have evolved from a high-temperature hydrothermal environment. The sulfur isotopic results show that the δ³⁴S values in the Jilinbaolige deposit range from 2.3‰ to 6.1‰, with an average value of 3.98‰, indicating that the sulfur originated from magmas with both mantle and crustal components. The Pb isotopic compositions (²⁰⁶Pb/²⁰⁴Pb = 18.214–18.330, ²⁰⁷Pb/²⁰⁴Pb = 15.478–15.615, ²⁰⁸Pb/²⁰⁴Pb = 37.957–38.292, μ = 9.24–9.50, ω = 34.49–36.49) of the sulfide ores suggest that that the lead is of crust-mantle mixed origin. The comparison between the S and Pb isotopic compositions of the Jilinbaolige deposit and the polymetallic deposits from the central-southern parts of the Great Xing’an Range suggests that these deposits have a similar metallogenic source, which is closely related to the Yanshanian granite and medium-temperature hydrothermal fluids. These ore-bearing hydrothermal fluids that evolved from deep magmatic sources migrated along the contact and fracture zones and during the subsequent gradual decrease in temperature, and the metallogenic components were deposited in the relatively open fracture and fissure space. Our results provide insights for further mineral prospecting in the south-central part of the Great Xing’an Range.

Hidden water disasters seriously affect the construction safety of coal mines and the life safety of technicians. In order to find out the spatial distribution of air-filled goaf and water-filled goaf in coal mines, opposing coils transient electromagnetic method (OCTEM) with high detection accuracy, high resolution, high sensitivity to abnormal bodies, and fast detection speed is used to carry out research. Through field data acquisition and inversion processing, the inversion profile, slice map, and three-dimensional shape rendering map of each survey line are obtained, and then the geological data are analyzed and explained. Finally, two low-resistance anomaly areas are delineated. One is speculated to be the old kiln goaf, and the other is speculated to be the water-filled goaf in the planning area in the next 5 years. After drilling verification, the speculation results are in good agreement with the actual situation. OCTEM provides an innovative technical basis for the detection of hidden hazards in mines, which has broad application potential in the field of mine exploration.