A Preliminary Study on Dust Grains in the Stratosphere

被引：1

作者：

黄伯钧 ^{[1
]}

欧阳自远 ^{[1
]}

傅平秋 ^{[1
]}

高振敏 ^{[1
]}

机构：

[1] Institute of Geochemistry Academia Sinica

来源：

Chinese Journal of Geochemistry(English Language Edition) | 1990年 / 02期

基金：

中国国家自然科学基金;

关键词：

A Preliminary Study on Dust Grains in the Stratosphere;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Collected by means of a high-altitude scientific balloon and a self made automatic sample collector,a to-tal of 276 dust grains were selected for the study of shape,grain size and optical property.Some of thegrains were examined by X-ray diffraction and electron microprobe techniques.The stratospheric dust grainscan be classified as 6 types:cosmic dusts,cosmic dusts ,microtektite,natural pollutants,artificialpollutants and the unknown substances.The different types of dust grains have different characters and dis-tinguishing symbols.Widespread in the space of the solar system,cosmic dusts are the initial substances of the solar systemand,to some degree,have recorded a great wealth of information on the early history of the solar system.So they have become one of the important objects in the field of cosmochemistry at present time.Since the1960’s,scholars of many countries have collected cosmic dusts both in the space near the earth (using rock-ets,space probes and space shuttles )and in the stratosphere (using high-altitude balloons or U-2 airplanes).According to the shape (the scanning electron microimage),element composition (the energy-dispersiveX-ray spectrum)and optical properties of dust grains,the substances in the stratosphere can be classified as5 types:cosmic dusts,alumina spheroids,terrestrial artificial pollutants,terrestrial natural pollutants andunknown substances (CDPET,1982).

引用

页码：105 / 114

页数：10