Implications of micro-compositions of garnet and biotite from high-grade meta-pelites

作     者：ZHOU Xiwen, WEI Chunjing, and ZHANG Shangkun ( Institute of Geology, CAGS, Beijing 100037, China School of Earth and Space Sciences, Peking University, Beijing 100871, China China University of Geo-Sciences, Beijing 100083, China) 

作者机构：Institute of Geology GAGS Beijing 100037 China School of Earth and Space Sciences Peking University Beijing 100871 China China University of Geo-Sciences Beijing 100083 China 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2006年第16卷第2期

页      面：209-214页

核心收录：

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：National Natural Science Foundation of China (Grant Nos. 40402008  40372032) 

主　　题：high-grade meta-pelites THERMOCALC P-T pseudosection peak compositions of garnet and biotite. 

摘      要：Based on detailed studies on the compositional zoning of garnet and biotite in pelitic rocks from the Jingshan group of granulite facies in north Jiaodong, P-T pseudosections with isopleths of Fe/(Fe + Mg) in garnet and biotite were calculated in the KF-MASH system for two representative rocks of sillimanite-garnet-cordierite-biotite gneiss ( Vbi/ Vg1 ) and sillimanite-garnet gneiss (Vbi/ Vg 1 can nearly preserve their peak compositions, and biotites in garnet-rich rocks with Vbi/Vg0. 2 cannot preserve their peak compositions due to the influence of grain-boundary fluid.