Application of microprobe-based flank method analysis of Fe^3＋ in garnet ofNorth Qilian eclogite and its geological implication

作     者：Xiaoli Li Shuguang Song Lifei Zhang E. Heidi Hofer 

作者机构：The Key Laboratory of Orogenic Belts and Crustal Evolution MOE School of Earth and Space Sciences Peking University Beijing 100871 China Institut fur Geowissenschaften Facheinheit Mineralogie Johann Wolfgang Goethe-Universitat D-60054 Germany 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2018年第63卷第5期

页      面：300-305页

核心收录：

学科分类：081902[工学-矿物加工工程] 0819[工学-矿业工程] 08[工学] 

基　　金：financially supported by the National Natural Science Foundation of China(41372060 41330210 and 41202032) 

主　　题：Microprobe Flank method Ferric iron GarnetNorth Qilian eclogite 

摘      要：A newly developed microprobe-based methodology(the Flank Method)for Fe^(3+)/RFe quantification has been successfully applied to some natural garnets from the North Qilian eclogites by JEOL JXA-8100microprobe at Peking *** results demonstrated an obvious discrepancy in comparison with the outcomes by conventional stoichiometric *** methodology allows to measure theFe^(3+)/Rmeasurement of Fe^(3+)According to the compositional zonation displayed in the studied eclogitic garnets from North Qilian,a prograde metamorphic°C to 22 kbar,600°C was *** interestingly,the measured Fe^(3+)/RFe ratios in garnets decreasing from core to rim may probably imply that the oxygen fugacity(f O_2)declines with the depth of the subduction zone.