【摘要】 本文论述了我国若干地区不同时代地层中宇宙尘的物理特性、化学成分和微结构特征,并同深海沉积的铁质尘粒进行了对比。笔者以为,这些宇宙尘是球外物质,可能是铁陨石在大气中的消熔物或是在太空中的碎裂物。更多还原

【Abstract】 In this paper, physical properties, chemical compositions and microstructural characters of cosmic dusts from different strata in some areas at China are dis-cussed, and contrasted with magnetic spherules from various oceans. It is believed that these cosmic dusts are of extraterrestrial origin. It might be the droplets sprayed from the fusion crust of a meteorite as it is ablated by grazing in atmo-sphere .更多还原