下庄铀矿田白水寨地区绿泥石特征及其地质意义  

Characteristics and Geological Significance of Chlorite in Baishuizhai Area,Xiazhuang Uranium Ore

作　　者：谭双[1,2] 刘成东[1] 李志文 梁良[1] 金海飞[1,2] TANShuang LIUCheng- dong LI Zhi- wen LIANGLiang JIN Hai- fei(State Key Laboratory Breeding Base of Nuclear Resources and Environment College of Earth Sciences,East China University of Technology,Nanchang 330013, P. R. China CCCCGuangzhou Waterway Engineering Design ＆ Research Institute Co, Ltd ,Guangzhou 510220, P. R. China)

机构地区：[1]东华理工大学省部共建核资源与环境国家重点实验室培育基地,南昌330013 [2]东华理工大学地球科学学院,南昌330013 [3]中交广州水运工程设计研究院有限公司,广州510220

出　　处：《科学技术与工程》2017年第14期7-15,共9页Science Technology and Engineering

摘　　要：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。Chloritization is an important alteration type of metallogenic epochs from the area of Baisliuizliai.Four kinds of chlorite output form have been showed by microscopic characteristics, which along the alkaline feldspar fissure vein filling was pulse,granular distribution. ） Chlorite from the mica minerals by alteration. ＊ 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-mmicrolite,indicating that they formed in the reducing environment.② The temperature range of formation ofchlorite is 172. 81 -228. 49 l （ averagely 202. 08 l ）, which belong to the mesothermal epithermal alteration.＊ formation mechanism are disolution-crystallization and disolution-migration- crystallization.

关 键 词：绿泥石 形成温度 铀成矿 白水寨地区 

分 类 号：P578.962[天文地球—矿物学]