宇宙尘埃的形成机制和运动规律  

THE FORMATION MECHANISM AND MOTION REGULARITY OF COSMIC DUST

作　　者：刘正坤[1] 于众[2] 彭汉昌[3] 

机构地区：[1]湖南有色金属研究所 [2]石油勘探开发科学研究院 [3]国家海洋局第一海洋研究所

出　　处：《海洋与湖沼》1990年第1期39-43,共5页Oceanologia Et Limnologia Sinica

基　　金：国家自然科学基金

摘　　要：通过对大量宇宙尘埃(或称球粒)进行扫描电镜微结构观察发现,所呈现的球粒外部形态、表面构造和内部结构千姿百态,形式多样,显示了其不同的形成机制和运动规律。The structures of cosmic dust formed during the ablation, sudden cooling and motion process are varied, e.g. the coremantle-crust, button-shaped, worm-shaped structures of iron cosmic dust and the relic, flanged, whirled, ablation structures of silicate cosmic dust, etc.These special structures are impottarit evidences for the physical and chemical variation of grains experienced after separated from their parent. For example, all extraterrestrial mate-rials entering the Earth's atmosphere are heated by atmospheric friction could easily produce the ablation and the wormshaped structure; some of cosmic dust from, comets and asteroids having the minerals and the structures of parent bodies produced the relict structures; the spherules colliding easily with each other during their formation and motion produced the impact structure, etc.

关 键 词：宇宙 尘埃 形成 海洋 沉积物 

分 类 号：P736.211[天文地球—海洋地质]