沙尘暴颗粒物的扫描电镜研究

SEM investigation on sandstorm particles

本文利用扫描电子显微镜 ,对 2 0 0 2年 3月 2 0日发生在中国北部的强沙尘暴颗粒物进行形态和成分的分析。结果发现 ,沙尘暴颗粒物的形态各异 ,有球形的、椭球的、长条形的以及疏松块状结构。有的颗粒物具有很好的磨圆度 ,有的却有棱有角 ,说明不同的颗粒物经过不同的搬运过程。X射线能谱分析表明 ,颗粒物主要为石英 ,粘土 。

Through electronic microscopy, some investigation were taken on the sandstorm particles that occurred on northern, China,on Mar.20,2002.It is found that the form of the sandstorm particles is various, including spherical, elongated, and cloddy particles in the samples.Some particles are good rounding, and others have edges and corners. It is showed that the particles experienced different transport processes. X-ray energy spectrum shows that the composition of particles is mainly quartz, clay and other minerals.