Study on the Characteristics of the Infrared Spectral and Exploration Application of Renli Granite Pegmatite Type Rare Metal Deposit in Northern Hunan

Renli is a super large rare metal deposit discovered in Jiangnan uplift belt in recent years. In this paper, the spectral mapping of ZK708, ZK716 in Renli area is carried out by using infrared spectroscopy technology, combined with mineral microscopic and geochemical analysis, finding out the types and combinations of altered minerals in the deposit, and the spectral characteristics of typical altered minerals in Renli deposit are discussed in relation to mineralization, building the infrared spectrum exploration model of Renli deposit, at the same time, predicting the hydrothermal alteration center of the surface in the southern margin of the Mufushan area. Research findings: (1) The low value of Pos2200 (2197 similar to 2198nm), The abnormally high value of IC (>3) of muscovite in pegmatite in the area is taken as the prospecting index; (2) There is a favorable metallogenic area near Hanshi Village in the southwestern Mufushan, and Yongxiang Village is thought as the regional hydrothermal alteration center. The infrared spectroscopy technology can effectively identify the alteration zoning and mineralization center of the rare metals deposit in Renli area, and provide a scientific basis for its further prospecting and exploration.