摘要
对赋存于南秦岭泥盆系浅变质碎屑岩中的陕西凤县八卦庙金矿主成矿阶段的石英中流体包裹体进行研究,发现八卦庙金矿成矿流体盐度变化较大,从中等偏低盐度到富含子矿物的高盐度流体包裹体均有分布,通过光学显微镜、EPMA、SEM/EDS观察发现子矿物主要为黄铁矿、石盐及一些成分复杂的子矿物.LRM分析流体包裹体成分以富含CO2为特征,除此之外还检出了CO,SO2,CH4,H2S,C2H2,C2H4等,表明矿床成矿流体具相对还原的复杂物理化学条件,不同于一般的热液金矿床.
Baguamiao gold deposit locates in the Devonian low-grade metamorphic rocks. According to a study on fluid inclusions in quartz from the main mineralizing stages, it was found that the ore-forming fluid was of salinity, from low, middle to high salinity (with daughter minerals). Pyrite and salt were identified among these daughter minerals by SEM/EDS and EPMA, LRM was also used for checking the composition of fluid inclusions. All of fluid inclusions was detected to be rich in CO2 and CO, SO2, CH4, H2S, and C2H2. C2H4 was also detected in some of them. It is concluded that the ore-forming fluid is of more reducing and complicated physical-chemical conditions.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2003年第1期1-4,共4页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金资助课题(No.49972031)
