Quartz and clinoenstatite exsolutions in clinopyroxene of garnet-pyroxenolite from the North Dabie Mountains,eastern China  

作　　者：SU Wen YOU Zhendong WANG Rucheng LIU Xianwe 

机构地区：[1]Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [2]Department of Nanjing University,Nanjing 210008,China [3]China University of Geosciences,Wuhan 430074,China

出　　处：《Chinese Science Bulletin》2001年第17期1482-1485,共4页

基　　金：the Ministry of Science and Technology of China (Grant No. G1999075501); the National Natural Science Foundation of China (Grant No. 49794041); the Postdoctor Science Foundation of China, the State Key Laboratory of Mineral Deposit, University of Nanji

摘　　要：The exsolution lamellae of quartz and clinoen-statite are idenfied in diopside of garnet-pyroxenolite from the North Dabie Mountain by transmission electron microscopy, which is interpreted that the lamellae are originally exsolved from a former ultra-high-pressure clinopyroxene due to decreasing of pressure. Study of petrography shows that there is compositional zoning hi the diopside itself. It is implied that the garnet-pyroxenolite had undergone intensive high-temperature granulite fades and high-amphibolitic fades retrogressive metamorphism, while the peridotite (the garnet-pyroxenolite’s host rock) emplaced theThe exsolution lamellae of quartz and clinoenstatite are idenfied in diopside of garnet-pyroxenolite from the North Dabie Mountain by transmission electron microscopy, which is interpreted that the lamellae are originally exsolved from a former ultra-high-pressure clinopyroxene due to decreasing of pressure. Study of petrography shows that there is compositional zoning in the diopside itself. It is implied that the garnet-pyroxenolite had undergone intensive high-temperature granulite facies and high-amphibolitic facies retrogressive metamorphism, while the peridotite (the garnet-pyroxenolite’s host rock) emplaced the crust.

关 键 词：structure of the EXSOLUTION in ciinopyroxene garnet-pyroxenolite Northern DABIE Mountains. 

分 类 号：P588[天文地球—岩石学]