湖南桂阳黄沙坪铅锌矿床矿物流体包裹体研究及矿床成因讨论

笔者从地质、矿石组合和流体包裹体等方面对黄沙坪铅锌矿床进行了研究。认为从时间和空间上看矿床具有清楚的岩浆—成矿系列演化特征。从内带到外带,矿物组合、元素特征、成矿温度、盐度和密度均显示明显的递变规律性。据此,笔者认为蒸气相的形成及沸腾成矿为岩浆热液提供的成矿物质和热动力条件是决定性的。即使成矿晚期从围岩地层中萃取部分成矿物质,也是极其次要的。

ON THE GENESIS OF THE HUANGSHAPING Pb-Zn DEPOSIT,QUIYANG,HUNAN IN SPECIAL REFERENCE TO FLUID INCLUSION STUDIES OF ITS MINERALS

The genesis of the Huangshaping Pb-Zn deposit has been studied based onits geological setting,mineral association and fluid inclusions.It is consider-ed that the deposit shows distinct evolutionary characteristics of a magmaticmineralization series.From the endozone to the exozone,the mineral associ-ation,chemical elements,ore-forming temperature,salinity and density varyprogressively.Thereby,the writer considers that ore-forming materials provi-ded for magmatic fluids as the result of concentration and boiling of vaporphase and other volatile components,and thermodynamic conditions thus createdare decisive factors controlling ore deposition,Although some material couldbe leached out of the sedimentary country rocks in the late stage,it would beof little importance.