Hydroxyl in continental deep subduction zone: Evidence from UHP eclogites of the Dabie Mountains  

作　　者：HarryW.Green 

出　　处：《Chinese Science Bulletin》2001年第7期592-596,共5页

基　　金：the National Key Project forBasic Research (Grant No. G1999075501); the National Natural Science Foundation of China (Grant No. 49672144); and the NSF of USA(#EAR-9725575).

摘　　要：Infrared spectra in the region of 3 000 to 4 000 cm-1 have been measured by an FTIR spectrometer on minerals in UHP eclogites from the Bixiling and Shuanghe areas, the Dabie Mountains. It is shown that omphacite is the most important hydrous mineral (100-200 μg/g) in UHP eclogites. Garnet and quartz contain virtually no H2O or OH. Accessory mineral rutile contains a significant amount of OH (】1 000 μg/g). Coesite gives no indication of the presence of OH but apparent H2O bands. The results have considerable implications for existing forms and contents of hydroxyl in the continental deep subduction zone, the eastern Dabie Mountains.Infrared spectra in the region of 3 000 to 4 000 cm?1 have been measured by an FTIR spectrometer on minerals in UHP eclogites from the Bixiling and Shuanghe areas, the Dabie Mountains. It is shown that omphacite is the most important hydrous mineral (100–200 μg/g) in UHP eclogites. Garnet and quartz contain virtually no H2O or OH. Accessory mineral rutile contains a significant amount of OH (>1 000 μg/g). Coesite gives no indication of the presence of OH but apparent H2O bands. The results have considerable implications for existing forms and contents of hydroxyl in the continental deep subduction zone, the eastern Dabie Mountains.

关 键 词：UHP ECLOGITE HYDROXYL FTIR quantitative analysis. 

分 类 号：P596[天文地球—地球化学]