Acta Petrologica et Mineralogica

As one of the important antimony mining areas in China, a large number of antimony polymetallic deposits (points) have been discovered in the southern Hubei antimony mining area. With the depletion of shallow antimony ore resources, there has been no new progress in the exploration of middle and deep parts. Therefore, there is an urgent need to find a fast and effective exploration method, conduct in-depth research on the exploration model and prediction of the area, in order to expand the amount of resources and exploration results. This article takes the Jinyinshan antimony polymetallic deposit as the research object. Short wave infrared spectroscopy (SWIR) technology was used to scan the rock cores of ZK3101 and ZK2701 boreholes in Jinyinshan antimony deposit, obtaining information on the types, combinations, and spectral parameters of altered minerals in Jinyinshan antimony deposit. The altered mineral zoning was divided, and the relationship between mineralization and altered mineral zoning was analyzed. The main altered minerals in the Jinyinshan antimony gold deposit include mica, chlorite, carbonate, etc. Among them, the sericite mineralization zone is closely related to mineralization. By calculating the Al—OH spectral characteristic parameters of sericite minerals, it was found that the crystallinity (IC value) of sericite at the mineralized site and the absorption peak value (Pos 2200) of the Al—OH 2200 nm characteristic peak showed low value anomalies (IC<2, Pos 2200<2205 nm), which can be used as an effective indicator of mineralization. It is believed that the application of shortwave infrared spectroscopy technology can quickly delineate antimony gold deposits, effectively guide mineral exploration, reduce exploration costs, improve exploration efficiency, and achieve breakthroughs in mineral exploration.

antimony deposits; hydrothermal alteration; infrared spectral analysis; sericite; chlorite; sericite crystallinity