中文摘要：

白牛厂银多金属矿床位于云南省蒙自市，前人针对该矿床成因进行了大量研究，但对于该矿床成矿流体特别是流体包裹体研究非常薄弱。系统地研究了与矿石伴生的石英和萤石中的流体包裹体，并首次发现了富CH4流体包裹体。根据测温分析以及拉曼探针测试结果，将包裹体分为两类，一类主要气相成分为H2O；另外一类气相成分主要为CH4，并含有少量H2S及微量的N2、CO2等气体。富甲烷流体是海底有机物还原海水形成，它的发现进一步佐证了白牛厂铅锌矿床的海底热液喷流成因；同时，富H2O包裹体则体现了燕山晚期岩浆热液对于矿床的进一步叠加改造。

英文摘要：

Bainiuchang Ag-polymetallic deposit is located in Mengzi City, Yunnan Province. Many previous researches have been conducted , on the genesis of the deposit, but few researches are made on ore-forming fluid, especially fluid inclusions. This study makes a systematic research on fluid inclusions in Bainiuchang Pb-Zn deposit and for the first time identifies the mono-phase methane-rich fluid inclusions. According to temperature measurement analysis and Raman probe test results, the inclusions can be divided into two categories, H2O, and CH4, which contains a small amount of H2S, N2, CO2. The identification of methane-rich fluid further verifies the submarine hydrothermal exhalative genesis of Bainiuchang Pb-Zn deposit. At the same time, the H2O rich inclusion reflects the further superimposed reformation of the magmatic hydrothermal fluid in the late period of Yanshan.