青海省锡铁山Sedex型铅锌矿床成矿流体来源及演化:流体包裹体及同位素地球化学证据  

Source and evolution of ore-fluid of the Xitieshan sedimentary-exhalative lead-zinc system,Qinghai province;Evidence from fluid inclusion and isotope geochemistry

作　　者：王莉娟[1,2] 彭志刚[1] 祝新友[1] 邓吉牛[3] 王玉往[1,2] 朱和平[2] 

机构地区：[1]北京矿产地质研究院,北京100012 [2]中国科学院地质与地球物理研究所矿物资源研究重点实验室,北京100029 [3]西部矿业有限责任公司,西宁830001

出　　处：《岩石学报》2009年第11期3007-3015,共9页Acta Petrologica Sinica

基　　金：自然科学基金项目(40672061);国家科技攻关项目(2003BA612A-07);973计划2006CB403500项目资助

摘　　要：锡铁山铅锌矿床产于青海省柴达木盆地北缘早古生代裂陷的中基性火山-沉积岩系中,是我国规模最大的铅锌矿床之一。流体包裹体的温度、盐度、气液相成分测试以及同位素组地球化学研究证明锡铁山矿床形成于喷流沉积系统。管道相成矿流体以深源为主,深源流体的CO_2等气相组分溢出及深源流体与海水的混合作用导致了成矿物质沉淀,层状矿体中石英岩是管道相向SE方向位移、喷流的结果,锡铁山铅锌矿床是VMS型与Sedex型系统的复合或过度。The Xitieshan lead-zinc deposit in Qinghai Province,China occurs in an Early Paleozoic sequence of intermediate-basic volcanic rocks and sediments developed in the northern margin of the Qaidam basin.It is one of the biggest lead-zinc deposits in China. The deposit is evidenced an sedimentary exhalative on system by isotope geochemical study and fluid inclusion measurement including homogenization temperature,salinity and molecular and ion compositions.The ore-forming fluids in feeders were deeply sourced. ...

关 键 词：喷流沉积系统 流体包裹体 深源水 锡铁山铅锌矿 青海省 

分 类 号：P618.43[天文地球—矿床学]