Abstract:
Fluorite is a strategic non-metallic mineral resource, and the supply-demand gap continues to widen. The Hongqi Forest Farm Fluorite Mine in Mohe belongs to the medium-low temperature hydrothermal-fault-controlled-hydrothermal metasomatic type, which is closely related to Mesozoic volcanic magmatic activities. The orebody occurrence is strictly controlled by structures and is hosted in fault breccia zones. Aiming at the strong concealment of the periglacial region shallow-covered fluorite orebody in Hongqi Forest Farm, geophysical exploration technologies such as magnetic method and electrical method are comprehensively applied, combined with regional and exploration area geological background for research. The results show that the fluorite orebody in the shallow-covered area presents high magnetic anomaly and low apparent resistivity characteristics. The interpretation accuracy of geophysical anomalies has a positioning error ≤15 m. Further combined with actual trenching, the prediction and verification success rate reaches 2 out of 3 trenches (verification rate 66.7%). Based on multi-source data such as geology and geophysics, a comprehensive fluorite mineralization three-dimensional verification prediction process is constructed. The study confirms that the synergistic geophysical exploration technology with multiple methods can effectively guide the exploration of fluorite in periglacial region shallow-covered areas and deep areas, providing technical reference for the mineralization of similar deposits. This paper is the achievement of a public welfare regional geological mineral resource survey project, belonging to the interdisciplinary research of technical methods and geological mineral resource exploration.