辽宁四道沟热液金矿床中石英的稀土元素的特征及意义  

Characteristics and significance of rare earth elements in quartz of Sidaogou hydrothermal gold deposit, Liaoning.

作　　者：范建国[1] 倪培[1] 苏文超[2] 漆亮[2] 田京辉[1] 

机构地区：[1]南京大学内生金属矿床成矿机制研究国家重点实验室,南京210093 [2]中国科学院地球化学研究所矿床地球化学开放研究实验室,贵阳550002

出　　处：《岩石学报》2000年第4期587-590,共4页Acta Petrologica Sinica

基　　金：国家自然科学基金 (编号 4970 2 0 2 3;4913 3 13 0 )资助项目

摘　　要：本文用 ICP- MS测定了辽宁四道沟金矿矿脉中石英及其中流体包裹体中的稀土元素含量 ,发现石英的稀土元素配分模式类似于其中流体包裹体的稀土元素配分模式 ,推断石英中的稀土元素主要赋存于流体包裹体中 ,流体包裹体中的稀土元素决定了石英的稀土元素配分模式。原生包裹体中的流体是和石英同源的 ,其稀土元素指示的是石英形成过程中流体的信息 ;而次生包裹体中的流体是石英形成后的流体活动产物 ,其稀土元素指示的是后期流体活动的信息。四道沟金矿含金石英脉中的流体包裹体以原生 -假次生占绝对优势 。The rare earth elements in quartz and fluid inclusions from the Sidaogou Gold Deposit, Liaoning were determined by Inductively Coupled Plasma Mass Spectrometry (ICP MS). The result shows that the REE pattern of quartz is similar to that of fluid inclusions. The REE in quartz are concentrated in fluid inclusions, and the REE pattern of the fluid inclusions shapes the REE pattern of the quartz in which it occurs. The primary inclusions are affinal to quartz, and the characteristics of REE in them should represent the characteristics of quartz forming fluid. Whereas the formation of the secondary inclusions is later than the crystallizing of quartz, and the REE in them will give out the information of late stage hydrothermal solution. Careful examination of fluid inclusion in gold bearing quartz vein of Sidaogou gold deposit reveals that the primary pseudo secondary inclusions in quartz vein are dominant, therefore, the REE parttern of gold bearing quartz veins represents the REE pattern of ore forming fluid of Sidaogou gold deposit.

关 键 词：稀土元素 石英 流体包裹体 金矿床 配分模式 

分 类 号：P618.51[天文地球—矿床学] P595[天文地球—地质学]