中低温热液富锗铅锌矿床是金属锗的重要来源。目前缺乏针对这类矿床富锗流体的组成、来源和演化等关键信息的有效制约，致使对锗富集机制的认识较薄弱。云南会泽富锗铅锌矿床是我国最大的锗生产基地，其四个阶段的闪锌矿中不仅发育足够大的原生流体包裹体，完整记录了成矿流体演化信息，而且锗含量存在明显差异，是研究中低温热液富锗铅锌矿床中锗成矿流体组成、来源和演化的理想对象。本课题拟在系统野外地质调查和室内研究的基础上，对会泽矿床中不同阶段闪锌矿开展单个流体包裹体原位LA-ICPMS成分分析，获取不同阶段流体的锗等金属元素及卤族元素含量，准确限定富锗流体的来源，精细刻画锗成矿流体演化过程，探讨锗富集的关键控制因素，为川滇黔地区和国内外其他中低温热液富锗铅锌矿床中锗富集机制研究提供借鉴。

The medium-low-temperature hydrothermal germanium-rich Pb-Zn deposit is an important source of germanium metal globally. Currently, the key information about the germanium-bearing fluids, such as composition, sources, and evolutions, are lacking and result in the poor understanding of the ore-forming mechanisms. The Huize germanium -rich Pb-Zn deposit, located at the Yunnan Province, is the largest germanium production base in China. The Pb-Zn mineralization is divided into four stages and their sphalerite show significantly variable contents of germanium. Our preliminary study have shown that sphalerite from each stage have primary fluid inclusions, which are allowed to be analyzed by LA-ICPMS and able to directly record evolutions of the mineralizing fluids. Additionally, these sphalerite from each stage obviously show different contents of germanium. Therefore, the Huize deposit is an ideal object to study the composition, sources and evolutions of the germanium-bearing mineralizing fluids in the medium-low-temperature hydrothermal germanium-rich Pb-Zn deposits. Based on systematic field and lab study, fluid inclusions hosted in sphalerite (and associated calcite) from four different stages in the Huize deposit will be selected for in-situ LA-ICPMS analyses of germanium and other metal elements as well halogen elements. The obtained results will allow us to reconstruct the sources and evolution of the germanium-bearing ore fluids, and provide significant insights into the ore-forming processes of the Huize deposit. It will also shed light on enrichment mechanism of germanium in Sichuan-Yunnan-Guizhou region and in other medium-low-temperature hydrothermal germanium-rich Pb-Zn deposits worldwide.