四川省若尔盖地区510-1热液型铀矿床形成的物理化学条件研究  

Physical-Chemical Conditions of Mineralization of No.510-1 Hydrothermal-Type Uranium Deposit of Ruergai Area,Sichuan Province

作　　者：黄昌华[1,2] 张成江[1] 周兵[2] 

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059 [2]四川省核工业地质调查院,四川成都610061

出　　处：《矿物学报》2012年第3期398-402,共5页Acta Mineralogica Sinica

摘　　要：根据矿物包裹体分析和热力学计算,结合矿床地质地球化学特征,研究了若尔盖地区510-1热液型铀矿床形成的物理化学条件。结果表明,510-1铀矿床的形成温度为165～245℃,压力为500×105～600×105Pa,pH值为5.35,Eh值为-0.2015 V,氧逸度为1.38×10-31Pa。初始含矿热液具有较高温压特征,来源于深部。成矿介质属于中低温、中压、低氧逸度、中性或弱酸性的还原环境。According to the data of fluid inclusions analysis,the thermodynamic methods and the geological-geochimica characteristics of the deposit,the authors studied the physical and chemical conditions for the formation of 510-1 hydrotherm-type uranium deposits in Ruergai.It turns out that the temperature of the solutions is between 165 ℃ and 245 ℃,pressure is between 500×105 Pa and 600×105 Pa,pH is 5.35,Eh is-0.2015 V,and fugacity of O2 is 1.38×10-31 Pa.It is clear that the solutions formed at higher temperature and higher pressure.It is indicated that the solutions converged from depth.The ore-forming conditions are medium-low temperature,medium pressure,low fugacity of O2,reducing environment of the neutral or subacidity.

关 键 词：铀矿床 含矿热液 物理化学条件 若尔盖地区 

分 类 号：P611[天文地球—矿床学] P619.14[天文地球—地质学]