Composition of Spinels, Spinel-Quartz Association and Mineral Reactions from Ultrahigh-Temperature Granulites: An Example from Spinel-Orthopyroxene-Garnet Granulite of the South Altay Orogenic Belt

• 责任者：Li Zilong (Department of Earth Science ; Zhejiang University ; Hangzhou 310027 ; China) ; Wang Huihui
• 刊名：Earth Science Frontiers
• 出版年：2010
• 卷期：17（1)
• 关键词：麻粒岩 ; granulite ; 新疆 ; Xinjiang
• 页码：p.74-85
• 图表：5 illus., 2 tables, 50 refs.
• 分类号：0802
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

Based on the preliminary study of paragenesis of spinel+quartz and reactions among specific minerals, the authors propose that the metamorphism can be divided into two episodes: the peak metamorphism with the temperature condition of 1 000℃ deduced and the retrograde metamorphism, and suppose a clockwise P-T path for the formation of the UHT rock from the South Altay orogenic belt. The formation of the UHT rock should be genetic link with the subduction of the Paleo-Asian Ocean and collision and orogeny of the Siberian plate and Kazakhstan-Junggar plate probably during Paleozoic.