关键词: 南极,行星际宇宙尘,恒星际宇宙尘

Abstract:

A large number of cosmic dust particles,micrometeorites and volcanic dust bands have been found and collected in Antarctic ice,snow and glacial sediments,especially in meteorite concentrated regions. Extraterrestrial spherules aslo have been discovered from the stratosphere and deep sea sediments. On the basis of distributive characteristics cosmic dust particles are classified into interplanetary dust particles and interstellar dust particles. According to their origin,cosmic dust particles can be divided into cometary origin,asteroidal origin,ablation from meteorites and interstellar origin. The criteria for identifying cosmic dust particles have been established and the origin of cosmic dust particles has aslo been discussed in this paper.