Geological characteristics, genesis and metallogenic model of Xucun uranium deposit in the northern margin of Huangmeijian intrusive body, Anhui Province.

The Xucun uranium deposit is located in the Luzong ore concentration area of the Middle and lower reaches of the Yangtze River metallogenic belt. It belongs to a middle-low temperature hydrothermal type uranium deposit which is related to Huangmeijian A-type granite in late Yanshanian period. The main ore types are feldspathic sandstone-type uranium ores and a few are quartz syenite type uranium ores. Based on the detailed field exploration and research work in recent years, this paper summarizes the metallogenic geological background and geological characteristics of the uranium deposits, discusses the mechanism of uranium mineralization. It is considered that the morphology and structural development of the rock-stratum contact interface are the decisive factors to control the spatial distribution of uranium ore body. The inner and outer contact zones of rock mass are the most favorable ore-bearing sites. Uranium mineralization is closely related to the intrusion of magmatic rocks in the late Early Cretaceous. In addition, the metallogenic mechanism of the deposit is further discussed and the metallogenic model of Xucun uranium deposit is established. That has important reference for enriching the theory of hydrothermal uranium mineralization related to A-type granite. At the same time, it also provides the basis for further exploring the uranium mineralization, metallogenic types and ore-prospecting potential of the NE-trending A-type granite belt in Huangmeijian area and even in Luzhou Basin. [ABSTRACT FROM AUTHOR]