贵州西南部分布一系列卡林型金矿，是我国重要的金资源地。与美国内华达卡林型金矿相比，贵州卡林型金矿一个显著的差异就是矿石中含有大量浸染状成矿期白云石（内华达卡林型金矿未见成矿期白云石）。成矿期蚀变矿物-白云石的地球化学特征和形成条件在一定程度上能反映金矿的地球化学特征和成矿环境。本项目拟以典型矿床—水银洞金矿为例，利用碳酸盐矿物染色法、SEM、EPMA、和LA-ICP-MS等方法和技术对浸染状成矿期白云石（兼顾其它碳酸盐矿物和载金矿物）开展精细的“原位-微区”形貌-主微量元素-碳氧同位素分析，来确定成矿期白云石的地球化学特征及其形成机制，进而反推贵州卡林金矿的精细成矿过程。研究成果对于揭示贵州卡林型金矿的成因，以及查明贵州卡林型金矿与内华达卡林型金矿之间差异性的关键控制因素具有重要制约作用。

Southwest Guizhou contains a number of Carlin-type gold deposits, and is an important gold resource region in China. Compared with Nevada Carlin-type gold deposits, the Guizhou deposits are characterized by abundant disseminated ore-stage dolomite in ore. The geochemical features and formation conditions of ore-stage dolomite can provide insights into the formation of the gold deposits. In this study, we take the Shuiyindong gold deposit as an example, and analyze the in-situ morphology, major and trace elements, and carbon-oxygen isotopes compositions of the disseminated ore-stage dolomite synthetically using the Staining Technique, SEM, EPMA, and LA-ICP-MS. We attempt to precisely determine the geochemical characteristics of ore-stage dolomite, reveal its formation mechanism, and uncover the detailed ore-forming process. Achievements attained in this study will not only provide constraints on the genesis of the Carlin-type gold deposits, especially the Guizhou Carlin-type gold deposits, but also provide constraints on the key factors which controls the differences between the Nevada and Guizhou Carlin-type gold deposits.