受冲击石英砂岩碎屑分析  

ANALYSIS OF IMPACTED QUARTZ SANDSTONE FRAGMENTS

作　　者：李大红[1] 余泉友[1] 熊大和[2] 徐道一[3] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,成都610003 [2]中国科学院地质研究所,北京100029 [3]国家地震局地质研究所,北京100029

出　　处：《矿物学报》1996年第4期389-393,T001,共6页Acta Mineralogica Sinica

摘　　要：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射线衍射等方法对岩靶受击后形成的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。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.

关 键 词：冲击抗 石英砂岩 碎屑 砂岩 

分 类 号：P588.212.3[天文地球—岩石学]