关键词: 铀矿, 金滩岩体, 成矿地质条件, 找矿方向

Abstract: Xiali Deposit is an important uranium deposit in Central and Western Jiangxi，which oc⁃ curs in the east of Jintan rock mass.On the basis of combing the previous exploration results of the deposit， the metallogenic geological characteristics of the Xiali Deposit is summarized，and the metallogenic geologi⁃ cal conditions of the deposit is analyzed from three aspects of lithologic conditions，structural conditions and hydrothermal alteration conditions.The study results show that the Early Yanshanian medium and finegrained mica granite is the main uranium source of uranium mineralization，and the northwest trending fault and east-west fault provide favorable migration channels and precipitation sites for mineralization，the two hydrothermal activities in the metallogenic period are closely related to uranium mineralization.The purple black fluorite mineralization，rice yellow montmorillonization，hydromica and powdered pyritization formed under the influence of hydrothermal activities are the signs of uranium metallogenic alteration in this area. Based on the above discussion results，taking the altered fracture zone subtype as the main prospecting type，three prospecting directions are defined in the north of No.1 zone of the deposit，the northwest section of xinwuxia fault zone and several uranium ore zones below -200 m elevation，so as to provide reference for the further work in the area.

Key words: uranium deposit, Jintan rock mass, metallogenic geological conditions, prospecting direc? tion