• 责任者：Wu Su (Key Laboratory of Depositional Mineralization and Sedimentary Minerals of Shandong Province ; College of Geological Sciences and Engineering ; Shandong University of Science and Technology ; Qingdao 266590 ; China) ; Li Xuping
• 刊名：Geological Review
• 出版年：2013
• 卷期：59(5)
• 关键词：角闪岩 ; amphibolites ; 假蓝宝石 ; sapphirine ; 尖晶石 ; spinel ; 天山 ; Tianshan Mountains
• 页码：p.823-831
• 图表：4 illus., 1 table, 36 refs.
• 分类号：0802
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

     Peraluminous sapphirine and Al-rich spinel were discovered in rodingitized amphibolite in the Dongdegou, Zhaosu County, southwestern Tianshan Mountains, the content of A12 03 in sapphirine is between 64. 82% and 66.36%, in Al-rieh spinel between 65.24% and 68.54%. According to the sapphirine-bearing mineral assemblages and mineral reaction textures, using the Theriak--Domino software, the metamorphic process of the bulk rock was simulated. The results showed that the peak temperature--pressure conditions were 700 -780 ~C ,0. 65 -0. 75 GPa, reaching granulite facies metamorphic conditions. The peak metamorphic reaction is： amphibole （Am） ＋ spinel （Spl） ＋ anorthite （An） = chlorite （Chl） ＋ diopside （Di） ＋ sapphirine （Spr）. Rocks experienced an Al-rich fluid/melt metasomatic metamorphism of high temperature. The occurrence of sapphirine-bearing granulite facies rocks adds new insight for the complicated metamorphic processes of rocks in supra subduction zone of the southwestern Tianshan Mountains, showing important geological implications.