Role of Water in Deformed Omphacite in UHP Eclogite from the Dabie Mountains,Eastern China
会议名称：《中国科学院地质与地球物理研究所2003学术年会》
会议日期：2003年
学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学]
基 金：funded by the Ministry of Science and Technology of China(No.G19990755-01) the National Natural Science Foundationof China,Postdoctoral Science Foundation of China the Chinese Academy of Sciences Wong K.C.Post-doctoral Research Award Fund and the State Key Laboratory of Mineral Deposits,Nanjing University
关 键 词：deformation hydrolitic weakening omphacite UHP eclogite Dabie Mountains China
摘 要：Omphacite grains from UHP eclogite of the Dabie Mountains in eastern China are elongated and show strong lattice preferred orientations(LPOs).Observations by the transmission electron microscopy(TEM) identified not only structures of plastic deformation occurring as free dislocation,dislocation loops and dislocation walls,but also bubbles of water present in the deformed *** bubbles attach to the dislocation loops which are often connected to one another via a common *** infrared spectroscopy(IR),two types of hydrous components are identified as hydroxyl and free-water in the *** analysis of deformation mechanism of microstructure in omphacite suggests that the mineral deformed plastically under UHP metamorphic conditions by dislocation creep through hydrolitic weakening.