Phase relations,Structure and Thermodynamic Properties of Na-Majorite:Experimental and Computer Modeling  

作　　者：Dymshits Anna 

机构地区：[1]Moscow State University

出　　处：《地学前缘》2009年第S1期280-280,共1页Earth Science Frontiers

摘　　要：Na-majorite is observed as an inclusion in mantle-derived diamonds and as mineral of rare ultra-deep xenoliths in kimberlites.Our experiments in different alumosilicate and carbonate-silicate systems at 7.0 and 8.5 GPa suggest that Na is incorporated in pyrope-rich garnet via the coupled substitution like Mg+Al=Si+Na.Thus,the mechanism of the Na-majorite formation assumed on mineralo-

关 键 词：Na-majorite GARNETS MANTLE transition zone experiment 

分 类 号：P584[天文地球—岩石学]