【摘要】 在西藏罗布莎蛇绿岩的豆荚状铬铁矿石及橄榄岩中找到了金刚石,少数金刚石存在有硅酸盐包体。本研究采用X射线衍射中的CCD(电子藕合)探测技术,测得了粒度仅为20 μm左右的包体矿物的粉晶X衍射数据,数据表明该硅酸盐包体有两种,为滑石和蛇纹石。从而说明了西藏罗布莎产于蛇绿岩中的金刚石是天然金刚石,并非“人工合成物”。更多还原

【Abstract】 Diamonds have been found in podiform chromitites and olivine rocks from the ophiolite in the Yarlung Zangbo River, Tibet. Some diamonds have silicate inclusions. Using the charge-coupled detector (CCD) sys-tem for X-ray diffraction, the authors have obtained powder X-ray diffraction data for inclusion minerals with crystal size of only 20 μrn. There are two kinds of silicate inclusions, which have been proved by the X-ray diffraction: talc and chrysoite. This indicates that the diamonds occurring in the Luobusha ophiolite are natural instead of synthetic.更多还原