【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。更多还原

【Abstract】 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.更多还原