云南金顶铅锌矿床成矿流体与流体的稀土元素研究  

REE OF FLUID INCLUSION AND ORE-FORMING FLUIDS IN THE GIANT JINDING Pb-Zn DEPOSIT,YUNNAN

作　　者：曾荣[1] 薛春纪[2] 刘淑文[1] 高永宝[1] 朱和平[3] 

机构地区：[1]长安大学资源学院地质系,西安710054 [2]中国地质大学地学院,北京100083 [3]中国科学院地质与地球物理研究所岩石圈演化国家重点实验室,北京100029

出　　处：《地质与勘探》2007年第2期55-61,共7页Geology and Exploration

基　　金：国家自然科学基金项目(编号:40272050;40472054);长安大学科技发展基金项目(编号:0305-1001)联合资助

摘　　要：金顶铅锌矿床流体包裹体的显微测温和流体的稀土元素特征表明：金顶矿区成矿流体均一温度为54℃～309℃，平均143℃，盐度（ω（NaCl），下文同）为1．6％～18．0％．平均6．0％。在矿区．由东向西、由北向南温度逐渐降低，而盐度从东向西稍有降低，但是从北向南却是增加的。从第一矿化阶段到第三矿化阶段，稀土总量和LREE／HREE都是逐步增加的，轻稀土富集程度逐步增强，并且轻、重稀土内部分异程度也由轻稀土分馏程度犬于重稀土分馏程度变为重稀土分馏程度大于轻稀土分馏程度，并且流体有从还原环境向氧化环境转变的趋势．REE and microthermometric analyses of fluid inclusions in the Jinding Pb - Zn deposit show that homogenization temperature of ore - forming fluid is at .54℃- 309℃ and 143℃ in average, and its salinity （ ω（NaC1） ） is at 1.6% - 18.0% and 6.0% in average. The results suggest that temperature in the ore district decreases from east to west and from north to south, and salinity in the ore district decreases from east to west but increases from north to south. REE of fluid inclusions in the Jinding Pb - Zn deposit indicate that ∑REE and LREE/HREE increase gradually and the enrichment magitude of LREE reinforces steadily from the first mineralization stage to the third one. It also shows that differentiation of LREE and HREE changes from stronger LREE fractionation to stronger HREE fractionation, and there is a changing trend of fluid from reducing environment to oxidizing environment.

关 键 词：金顶铅锌矿 流体包裹体 显微测温 稀土元素 

分 类 号：P618.42[天文地球—矿床学] P618.43[天文地球—地质学]