Zn-Rich Spinel in Association with Quartz in the Al-Rich Metapelites from the Mashan Khondalite Series, NE China

作     者：Xinzhuan Guo Akira Takasu Yongjiang Liu Weimin Li 

作者机构：Institute for Study of the Earth's Interior Okayama University Department of Geoscience Shimane University College of Earth Sciences Jilin University 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2014年第25卷第2期

页      面：207-223页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by a JSPS Grant-in-Aid for Scientific Research (No. 17340149) to Akira Takasu by the NSFS of China (No. 40739905) to Yongjiang Liu by the 973 project of the Ministry of Science and Technology of China (No. 2013CB429802) by the National Natural Science Foundation for the Youth of China (No. 41302175) to Weimin Liu 

主　　题：Al-rich metapelites Mashan complex khondalite spinel+quartz granulite. 

摘      要：Al-rich metapelites from the Mashan khondalite series are characterized by the assem- blage Spl＋Grt＋Sil＋Crd＋Bt＋Pi （An72）＋Kfs＋Quartz＋graphite. Large amounts of spinel＋quartz assem- blages occur as inclusions in garnet and prismatic sillimanite in the Ai-rich metapelites of the Mashan complex, NE China. The chemical composition of spinel is characterized by Zn-rich （Xzn=0.33-0.40. Xzn=Zn/Zn＋Mg＋Fe＊） （Fe＊=FeZ＋＋Fe3＋） and Fe3＋ rich （up to 0.31 p.f.u.）. The characteristic chemical composition and the mineral association indicated that the formation of spinel and quartz assemblage may be due to the breakdown of Zn-rich staurolite. The geothermobarometers studies show that the peak temperature of the Mashan complex is around 820 ℃ and the peak pressures is 8.0 kbar. The Mashan complex shows a typical orogen style P-T path.