Pan-African high-grade metamorphism of southern Sinai, Egypt, fluid inclusion evidence  

作　　者：Mohamed El Tokhi Abdalla Musallum 

机构地区：[1]Geology Department, College of Science, United Arab Emirates University,United Arab Emirates

出　　处：《Chinese Journal Of Geochemistry》2009年第4期358-363,共6页中国地球化学学报

摘　　要：Fluid inclusions in the leucosomes of Wadi Feiran migmatites showed that CO2, H2O and (H2O-CO2) fluids were likely to have been present when partial melting began in these rocks. Low salinity, aqueous fluid, to a lesser extent, CO2-rich fluids are the most abundant fluids. The present study suggests that high-density CO2 inclusions were formed at the earliest stage, while H2O inclusions were formed at the late stage. In an intermediate stage, low-density CO2 and H2O, CO2 inclusions were formed. At the early stage of uplift and during melt crystallization, the CO2-bearing vapour was trapped at grain boundaries. At the late stage of uplift, H2O released at the time of crystallization of the melt was trapped as inclusions.Fluid inclusions in the leucosomes of Wadi Feiran migmatites showed that CO2, H2O and （H2O-CO2） fluids were likely to have been present when partial melting began in these rocks. Low salinity, aqueous fluid, to a lesser extent, CO2-rich fluids are the most abundant fluids. The present study suggests that high-density CO2 inclusions were formed at the earliest stage, while H2O inclusions were formed at the late stage. In an intermediate stage, low-density CO2 and H2O, CO2 inclusions were formed. At the early stage of uplift and during melt crystallization, the CO2-bearing vapour was trapped at grain boundaries. At the late stage of uplift, H2O released at the time of crystallization of the melt was trapped as inclusions.

关 键 词：流体包裹体 西奈半岛 变质作用 埃及 证据 二氧化碳 局部熔融 熔体包裹体 

分 类 号：P593[天文地球—地球化学]