滇黔桂三角地区锑矿床流体包裹体研究  

FLUID INCLUSION GEOCHEMISTRY OF ANTIMONY DEPOSITS IN THE BORDER AREA BETWEEN YUNNAN, GUIZHOU AND GUANGXI

作　　者：蔡华君[1] 张宝贵[1] 李院生[1] 

机构地区：[1]中国科学院地球化学研究所,贵阳550002

出　　处：《矿物学报》1997年第4期427-434,共8页Acta Mineralogica Sinica

基　　金：中国科学院矿床地球化学开放研究实验室资助

摘　　要：通过对滇黔桂三角地区四个代表性锑矿床中矿物流体包裹体特征、相变行为的系统观察和测定，以及对包裹体气液相成分的分析，获得了本区两种类型锑矿床成矿过程中成矿流体的温度、盐度、密度、流体成分、成矿压力、矿化深度及pH、fo2、还原参数等成矿的物理化学参数。结果表明：本区锑矿床成矿流体以NaCl－H2O体系为主，中—弱碱性，中—低盐度，主成矿期成矿温度峰值为150～200℃。The border area between Yunnan, Guizhou and Guangxi is an important Au-Hg-Sb-As T1 belt in china. Antimony deposits in the area may be classified as two types: stibnite-fluorite type and stibnite-quartz type.Four antimony deposits in the area were selected for detailed study of fluid inclusion geochem istry because of their good representativeness. Based on the characteristics and phase changes of fluid inclusions and the composition of both vapor and liquid phases of fluid inclusions, several physicochemical parameters of mineralization such as temperature, pressure, depth, salinity, density, composition of ore fluid, pH, fo2, and reduction parameter (R) have been obtained. The research indicates that: the system of ore-forming fluids is predominantly a NaCl-H2O system, and the temperature, salinity and pH values of the fluids are 150~ 200℃, 7wt%~ 9 wt% NaCl and 7. 5~8- 1 (alkaline to weak alkaline ),respectively.

关 键 词：地球化学 锑矿床 液包体 

分 类 号：P618.660.4[天文地球—矿床学]