Chloritization is an important alteration type of metallogenic epochs from the area of Baishuizhai.Four kinds of chlorite output form have been showed by microscopic characteristics,which includes.① Chlorite along the alkaline feldspar fissure vein filling was pulse, granular distribution.② Chlorite from the mica minerals by alteration.③ Chlorite is altered by feldspar.④ Chlorite and uranium mineral closely.The results of electron probe microanalysis showed as follows.① The chlorites in the area are iron-magnesium chlorite, vermiculite, and microlite, indicating that they formed in the reducing environment.② The temperature range of formation of chlorite is 172.81~228.49 ℃ (averagely 202.08 ℃), which belong to the mesothermal epithermal alteration.③ formation mechanism are dissolution-crystallization and dissolution-migration-crystallization.%绿泥石化是白水寨地区重要的成矿期蚀变类型.根据绿泥石的形貌特征,该地区绿泥石主要有4种产出形态:第一类为沿裂隙充填呈脉状分布的绿泥石;第二类是由云母类矿物蚀变而成的绿泥石;第三类是由长石蚀变而来的绿泥石;第四类是与铀矿物紧密共生的绿泥石.主要利用电子探针分析技术,对绿泥石化学成分进行研究.结果表明:该地区绿泥石主要为铁镁绿泥石、蠕绿泥石以及密绿泥石,指示其形成于还原环境,温度范围为 172.81~228.49 ℃,平均为 202.08 ℃,属中-低温热液蚀变;具体形成机制主要有"溶蚀-结晶"和"溶蚀-迁移-结晶"两种方式.
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