Coesite inclusions in zircon from gneisses identified by laser Raman microspectrometer in ultra-high pressure zone of Dabie Mountains,China  

作　　者：LIU Jingbo YE Kai CONG Bolin Maruyama Shegnori FAN Hongrui 

机构地区：[1]Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [2]Department of Earth and Planetary Sciences,Tokyo Institute of Technology,2-12-1 Ookayama,Meguro Tokyo,152,Japan

出　　处：《Chinese Science Bulletin》2001年第22期1912-1916,共5页

基　　金：This work was sup- ported by the National Natural Science Foundation of China (Grant No.49972029) ; the Ministry of Science and Technology of China (Grant No. G1999075501).

摘　　要：The mineral inclusions in zircon from gneisses in ultra-high pressure (UHP) zone of the Dabie Mountains were identified by using a laser Raman microspectrometer. Coesite occurs as inclusions in zircons from all types of gneiss. Other important minerals, such as jadeite, omphacite, aragonite, barite, and anhydrite were also found as inclusion minerals. These discoveries indicate that ( i) gneissic country rocks had metamorphosed at the same time as the enclosed eclogites; and (ii) SO4-2 -bearing fluids were presentin the UHP metamorphic process, which is manifested by occurrence of barite and anhydrite coexisting with coesite.The mineral inclusions in zircon from gneisses in ultra-high pressure (UHP) zone of the Dabie Mountains were identified by using a laser Raman microspectrometer. Coesite occurs as inclusions in zircons from all types of gneiss. Other important minerals, such as jadeite, omphacite, aragonite, barite, and anhydrite were also found as inclusion minerals. These discoveries indicate that ( i) gneissic country rocks had metamorphosed at the same time as the enclosed eclogites; and (ii) SO4-2 -bearing fluids were presentin the UHP metamorphic process, which is manifested by occurrence of barite and anhydrite coexisting with coesite.

关 键 词：古口 上口 苦口 闰土 回回 雹日 口钩 

分 类 号：P59[天文地球—地球化学]