Fluid evolution and exhumation history of ultrahigh-pressure rocks at Lanshantou,Sulu terrane,Eastern China

【摘要】：正Fluid inclusions in coesite-bearing eclogites and eclogite-facies quartz veins at Lanshantou in the Sulu ultrahigh-pressure metamorphic(UHPM)terrane,Eastern China,have preserved remnants of peak metamorphic and exhumation fluids.Three types of fluids have been distinguished:(1)mixed H_2O-CO_2[N2 fluid,(2)hypersaline aqueous fluid and(3)low salinity H_2O fluid.Mixed H_2O-CO_2]N_2 fluids were introduced during or just after peak metamorphism.The hypersaline fluids might be products of dehydration melting during early stage of exhumation.Low salinity H_2O inclusions can be related to the latest evolutionary stage of the high-pressure veins during exhumation.

【作者单位】：Institute of Mineralogy,Petrology and Geochemistry,University of Tübingen Shandong Institute of Geological Sciences
【基金】：supported by Major State Basic Research Program of People's Republic of China (Grant No.G1999075502)
【分类号】：P584