华南花岗岩岩浆期后热液与铀成矿热液的初步对比  

COMPARISON BETWEEN URANIUM ORE-FORMING FLUIDS AND MAGMATIC FLUIDS OF GRANITES, SOUTHERN CHINA-A PRELIMINARY STUDY

作　　者：戚华文[1] 胡瑞忠[1] 

机构地区：[1]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：《矿物学报》2000年第4期401-405,共5页Acta Mineralogica Sinica

基　　金：国家杰出青年基金!(批准号:49925309)

摘　　要：以华南两个复式岩体中的中生代（主要是燕山期）花岗岩为例，通过对石英中原生流体包裹体类型、分布特征、均一温度、盐度、压力、形成深度的确定，结合包裹体成分分析，并与华南部分铀矿床成矿流体进行对比，认为高温高压、低CO-2和HCO--3含量、低f-O-2，是制约华南含铀花岗岩体在成岩过程中分异出的岩浆流体不能活化自身携带的铀,而形成与花岗岩侵入同期铀矿床的主要原因。This paper focuses on primary fluid inclusions in the Yanshani an S-type granites, Zhuguangshan and Guidong, southern China, based on microsco pic identification, microthermometry, compositional analysis of the fluid inclus ions and thermodynamic calculations, to constrain the evolution of magmatic flui ds and the difference between magmatic fluids and uranium ore-forming fluids. W e concluded that high temperature, high pressure, low CO-2 and HCO--3, low f-O-2 are the main factors leading to the impossibility that m agmatic fluids could not activate uranium in granites to form uranium deposits s imultaneously with the intrusion of granites.

关 键 词：花岗岩 流体包裹体 铀矿床 成矿流体 岩浆流体 

分 类 号：P619.14[天文地球—矿床学] P594[天文地球—地质学]