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矿床地质  2008 

滇西沧源铅锌多金属矿集区流体包裹体研究

Keywords: 地球化学,流体包裹体,铅锌多金属矿床,滇西沧源,沧源,铅锌,多金属,矿集区,流体包裹体,研究,westernYunnan,area,concentration,fluidinclusions,混合流体,岩浆水,大气降水,循环演化,成矿流体,成矿深度,均一温度,体系,结果,矿床成因

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Abstract:

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.

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