受冲击石英砂岩碎屑分析

利用二级轻气炮将６ｍｍ直径的钢球加速到５～７ｋｍ／ｓ后撞击石英砂岩靶，利用磁性分选，扫描电镜和Ｘ射线衍射等方法对嵌靶受击后形成碎屑进行了矿物分类和鉴别，碎屑主要由石英，高硅玻璃，微量柯石英以及铁碎屑，微细钢球等组成，７０％的碎屑分布在０．０９７～０．９０ｍｍ范围内，无一弱磁性碎屑约占总重量的９２％，其它为强磁性碎屑。

ANALYSIS OF IMPACTED QUARTZ SANDSTONE FRAGMENTS

A quartz sandstone target was impacted by a steel ball (6 mm in diameter) accelerated at5~7 km/s by means of a two-stage light gas gun. Mineralogical classification and identification ofthe quartz sandstone fragments formed in response to the impact were carried out by magnetic separation, scanning electron microscopy, X-ray diffraction and other methods. The resu1ts show thatthe fragments are composed mainly of quartz, high-Si glass, trace coecite, ferrous Uagments andmicro-fine steel spherules. 70% of the quartz sandstone fragments is distributed in the range of0.097~0. 90 mm fract1ons. Non- and weakly magnetic fragments account for about 92% of the total and the rest are the strongly magnetic fragments.