滇西沧源铅锌多金属矿集区流体包裹体研究  

A study of fluid inclusions from Cangyuan lead-zinc polymetallic ore concentration area in western Yunnan

作　　者：肖晓牛[1] 喻学惠[1] 杨贵来[1] 杨伟光 莫宣学[1] 曾普胜 

机构地区：[1]中国地质大学,北京100083 [2]云南省地矿资源股份有限公司,云南昆明650215 [3]云南省财贸大学,云南昆明650221

出　　处：《矿床地质》2008年第1期101-112,共12页Mineral Deposits

基　　金：国家重点基础研究发展规划项目(2004CB412603)的资助

摘　　要：滇西沧源铅锌多金属矿集区位于中缅边境的金腊-金厂一带,是云南省地质矿产局和地质矿产资源股份有限公司新近探明和开发的一个新的资源地。文章通过对矿集区脉石矿物中流体包裹体的类型、特征、成矿温度、盐度、密度、成矿压力以及流体包裹体中气液相成分和C、H、O同位素地球化学方面的分析,探讨了流体性质、来源及矿床成因。结果表明,该区流体主要属于NaCl-H2O体系和NaCl-CO2-H2O体系,均一温度主要集中在160~320℃之间,盐度w（NaCleq）在0~20%左右,由成矿压力推算的成矿深度在0.7-11.5km内。由此推测成矿流体主要是经深部循环演化了的大气降水与岩浆水的混合流体。The Cangyuan lead-zinc polymetallic ore concentration area in western Yunnan lies in Jinchang-Jinla area near the China-Myanmar border area, and is a new resource area developed and explored recently by Yunnan Bureau of Geology and Mineral Resources as well as Yunnan Geology and Mineral Resources Co. Ltd. This paper deals with types, characteristics, temperatures, pressures, salinities and densities of fluid inclusions and analytical data of fluids, gases and C, H, O isotopes. Researches show that the ore-forming fluids are of the NaCl-H2O and NaCl-CO2-H2O types, the homogenization temperatures are concentrated in the range of 160-320℃, the salinities w（NaCleq） are in the range of 0-- 20%, and the mineralization depths are about 0.7-11.5 km. It is thus concluded that the ore-forming fluids may belong to a mixed solution between meteoric water and magmatic water.

关 键 词：地球化学 流体包裹体 铅锌多金属矿床 滇西沧源 

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