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本文研究的宇宙尘,是研究南大地质系研究生傅成义同志送本室三个花岗岩人工重砂样(其中两个改造型的花岗岩)所发现的。两个样品中一个是太古代的混合花岗岩,在其中发现了近百颗黑色磁性球粒;另一个样品是晚侏罗纪的细粒二长花岗岩,发现了大小一千多颗黑色磁性宇宙尘,还有个别褐黑—棕色、灰白色的玻璃质、硅质球粒。这些磁性球粒具有层壳结构、熔蚀结构、空腔构造和气印构造。大多数球粒都包含有亮钢灰色的金属核心(图1)。本文通过双目镜鉴定、反光镜观察测定、X光粉晶分析、电子探针分析,初步对宇宙尘的物理性质、光学性质、化学成分进行了研究。主要通过扫描电镜的微观形态观察、照
The cosmic dust studied in this paper was discovered by three granitic artificial sand samples (two of which are modified granites) sent to our lab by Comrade Fu Chengyi, a graduate student of the South China University of Geosciences. One of the two samples was an Archean mixed granite in which nearly a hundred black magnetic spheres were found. The other sample was Late Jurassic fine-grained granite that was found to have more than a thousand black magnetic cosmic dusts , There are a few brown black - brown, gray glassy, siliceous pellets. These magnetic spheres have a shell structure, a fusional structure, a cavity structure, and an air-foil structure. Most pellets contain a bright steel gray metal core (Figure 1). In this paper, the physical properties, optical properties and chemical composition of cosmic dust were studied through the identification of binocular, the observation of reflector, the analysis of X-ray powder and the analysis of electron probe. Mainly through the SEM microscopic observation, according to