• 责任者：Liu Yican (Key Laboratory of Crust-Mantle Materials and Environments ; CAS ; School of Earth and Space Sciences ; University of Science and Technology of China ; Hefei 230026 ; China) ; Gu Xiaofeng
• 刊名：Acta Petrologica Sinica
• 出版年：2011
• 卷期：27(2)
• 关键词：榴辉岩 ; eclogite ; 高温 ; high temperature ; 超高压变质作用 ; ultrahigh pressure metamorphism ; 大别山 ; Dabie Mountains
• 页码：p.589-600
• 图表：5 illus., 87 refs.
• 分类号：0802
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

Recent investigations of metamorphic rocks from North Dabie complex zone (NDZ) suggest that the NDZ wholly underwent high-T/UHP metamorphism and multistage exhumation history. The eclogites are characterized by high-T metamorphism and multiple symplectites that formed by granulite-and amphibolite-facies metamorphism during decompression. The occurrence of radial cracks around quartz inclusions and of polycrystalline quartz inclusions in garnet, most likely suggests that these inclusions formerly were coesite, now inverted to quartz. These data demonstrate that the NDZ wholly experienced the Triassic deep subduction and UHP metamorphism.  The multiple coronitic and symplectitic reaction textures and the occurrence of compositionally zoned minerals such as garnet and clinopyroxene record multistage rapid exhumation of the UHP eclogites. Their metamorphic P-T conditions and isotopic ages for various stages show that they experienced a protracted high-T period with slow cooling process.