关键词: 吉林中部, 新安屯钼矿床, 地球化学测量, 高精度磁测, 斑岩型钼矿床, 激电测深, 物化探特征, 找矿潜力

Abstract:  The Xin’antun molybdenum deposit in central Jilin Province, located within the Lesser Khingan-Zhangguangcai Range metallogenic belt, features simple stratigraphy with widespread distributed granodiorite, monzonitic granite and alkali granite in the southwest part of the mining area. During the early Yanshanian, frequent tectonic and magmatic activity, driven by the subduction of the Paleo-Pacific plate, facilitated molybdenum mineralization. The ore bodies, hosted in granodiorite and controlled by NE-trending faults, are mainly quartz veinlet-stockwork and veinlet-disseminated types, belonging to quartz vein-porphyry molybdenum deposit. To assess the prospecting potential comprehensively, this paper integrates geological characteristics with physical and chemical exploration data. Principal component analysis of soil geochemistry shows multi-stage metallogenesis from high temperature to medium-low temperature and indentifies a target area based on combined anomalies of Mo, W, Cu and Bi. Electric and magnetic surveys show magnetic anomalies correlating with distribution of the rock bodies and strata; Fault zones show positive and negative magnetic anomalies. Medium-high-resistivity and high-polarisation induced polarization anomalies delineate ore bodies and mineralised zones. Electrostatic bathymetry, combined with geological sections, confirms the shallow ore bodies are within a high-polarisation body, extending at depth, indicating potential for large-scale porphyry molybdenum ores. This comprehensive geological, physical and chemical exploration indentified 4 prospective metallogenic zones.

Key words: the central area of Jilin Province, Xin’antun molybdenum deposit, geochemical survey, high-precision magnetic survey, porphyry molybdenum deposit, induced polarization , sounding, geophysical-geochemical features, prospecting potential