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

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.