| An X-Ray Diffraction Study of an Inclusion in Diamond from the Luobusha Chromite Deposit in Tibet, China |
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| 作者姓名： | SHI Nicheng BAI Wenji MA Zhesheng FANG Qingsong XIONG Ming YAN Binggang DAI Mingquan and YANG JingsuiChina University of Geosciences Beijing E-mail: shinicheng@a-l.net.cn Institute of Geology Chinese Academy of Geological Sciences Beijing Liu Shuchun and Zhu Xiling |
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| 作者单位： | SHI Nicheng，BAI Wenji，MA Zhesheng，FANG Qingsong，XIONG Ming，YAN Binggang，DAI Mingquan and YANG JingsuiChina University of Geosciences，Beijing 100083; E-mail: shinicheng@a-l.net.cn Institute of Geology，Chinese Academy of Geological Sciences，Beijing 100037 Liu Shuchun and Zhu Xiling |
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| 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.
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| 关 键 词： | X射线衍射分析 蛇纹石 钻石 中国 西藏 铬铁矿沉积 |
An X-Ray Diffraction Study of an Inclusion in Diamond from the Luobusha Chromite Deposit in Tibet, China |
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| Authors: | SHI Nicheng BAI Wenji MA Zhesheng FANG Qingsong XIONG Ming YAN Binggang DAI Mingquan and YANG JingsuiChina University of Geosciences Beijing E-mail: shinicheng@a-lnetcn Institute of Geology Chinese Academy of Geological Sciences Beijing Liu Shuchun and Zhu Xiling |
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| Abstract: | 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. |
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| Keywords: | diamond from ophiolite inclusion in diamond Luobusha of Tibet China |
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