Geological Characteristics, Genetic Types and Utilization Value of Yonghong Fluorite Deposit in Mabian Area, Southwest Sichuan and Its Enlightenment to Regional Prospecting

Sichuan is an area where there are no fluorite deposits and no fluorite metallogenic belts. The discovery of medium-sized fluorite deposit in Mabian area is of great significance. Through field geological investigation and collection and analysis of geological data, the genesis of Yonghong Fluorite deposit in Mabian area and its enlightenment to regional prospecting are discussed. The results showed that the ore body occurs in the siltstone of Qiongzhusi Formation of Cambrian Terreneuvian, which is strictly controlled by fault. The metallogenic factors are dolomite, limestone, fluorine-containing phosphorites and fault, and there are no volcanic rock and intrusive rock. The five subtypes of hydrothermal filling type fluorite deposits summarized by predecessors have volcanic rock or intrusive rock. Therefore, it is summarized as a new subtype of hydrothermal filling fluorite type deposit-Yonghong subtype of hydrothermal filling type fluorite deposit (fault+carbonate rock+fluorophosphate); Yonghong fluorite deposit in Mabian area is a medium-sized fluorite deposit with an identified resource of 450000 t and its average content of CaF₂ was 34.61%; Through the comparative analysis of metallogenic factors, Mabian-Leibo-Jinyang areas on Ebian-Jinyang fault zone have good fluorite prospecting prospects. The above results are of great significance to fill the gap of fluorite without metallogenic belt in Sichuan, guide the regional prospecting of Ebian-Jinyang fault zone and promote the economic development of Wumeng Mountains region.