Fluid inclusions in whiteschist in the ultrahigh-pressure metamorphic belt of Dabie Shan,China  

作　　者：Hongrui Fan Jingbo Liu Jinghui Guo Kai Ye Bolin Cong 

机构地区：[1]Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China

出　　处：《Chinese Science Bulletin》2002年第12期1028-1032,共5页

基　　金：This work was supported by the State Key Basic Research Program of China (Grant No. G1999075502).

摘　　要：Hualiangting whiteschist in the Dabie Shan ultrahigh-pressure eclogite complex is a specific Mg-Al-rich metamorphic rock. Its protolith was a felsic dyke, which suffered replacement by high-pressure fluids during ec-logite-facies metamorphism. Based on fluid inclusion results in whiteschist, primary high-pressure fluids are CO2-bearing aqueous solutions. Those prove that there exists CO2-H2O fluid during the ultrahigh-pressure metamorphism. Pseu-dosecondary H2O inclusions were trapped during ultra-high-pressure exhumation, whereas secondary H2O inclusions were related to the latest evolutionary stage of the ultrahigh-pressure exhumation.Hualiangting whiteschist in the Dabie Shan ultrahigh-pressure eclogite complex is a specific Mg-Al- rich metamorphic rock. Its protolith was a felsic dyke, which suffered replacement by high-pressure fluids during eclogite-facies metamorphism. Based on fluid inclusion results in whiteschist, primary high-pressure fluids are CO2-bearing aqueous solutions. Those prove that there exists CO2-H2O fluid during the ultrahigh-pressure metamorphism. Pseudosecondary H2O inclusions were trapped during ultrahigh-pressure exhumation, whereas secondary H2O inclusions were related to the latest evolutionary stage of the ultrahigh-pressure exhumation.

关 键 词：FLUID INCLUSION whiteschist ULTRAHIGH-PRESSURE DABIE Shan. 

分 类 号：P631.8[天文地球—地质矿产勘探]