An X-Ray Diffraction Study of an Inclusion in Diamond from the Luobusha Chromite Deposit in Tibet,China  

作　　者：SHINicheng BAIWenji MAZhesheng FANGQingsong XIONGMing YANBinggang DAIMingquan YANGJingsui 

机构地区：[1]ChinaUniversityofGeosciences,Beijing100083 [2]InstituteofGeology,ChineseAcademyofGeologicalSciences,Bering100037

出　　处：《Acta Geologica Sinica(English Edition)》2003年第3期326-331,共6页地质学报（英文版）

基　　金：supported by the National Natural Science Foundation of China grants 4997203 and 49872019.

摘　　要：Diamond was found in podiform chromitites of ophiolite and harzburgite from Luobusha, Tibet. There are silicate inclusions in some diamond grains from this area. In the present work, the CCD (charge coupled detector) technology of X-ray powder diffraction was applied to the study of the inclusion in diamond from the ophiolite of Tibet. Diffraction patterns are obtained even though the inclusion is only 20 μm in crystal size. The results show that the inclusion in diamond consists of talc and clinochrysotile. Therefore, it is clear that the diamond from the ophiolite of Luobusha, Tibet, is natural diamond rather than a synthetic one.Diamond was found in podiform chromitites of ophiolite and harzburgite from Luobusha, Tibet. There are silicate inclusions in some diamond grains from this area. In the present work, the CCD (charge coupled detector) technology of X-ray powder diffraction was applied to the study of the inclusion in diamond from the ophiolite of Tibet. Diffraction patterns are obtained even though the inclusion is only 20 μm in crystal size. The results show that the inclusion in diamond consists of talc and clinochrysotile. Therefore, it is clear that the diamond from the ophiolite of Luobusha, Tibet, is natural diamond rather than a synthetic one.

关 键 词：diamond from ophiolite inclusion in diamond Luobusha of Tibet China 

分 类 号：P578.964[天文地球—矿物学] P575.5[天文地球—地质学]